Black Box 325 User Manual
  1. Manuals
  2. Brands
  3. Black Box Manuals
  4. Modem
  5. 325
  6. User manual
Black Box 325 User Manual

Black Box 325 User Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
Modem 325 Card
CUSTOMER
To order or for technical support: Call 724-746-5500 or fax 724-746-0746
Technical support and fax orders 24 hours a day, 7 days a week
SUPPORT
Phone orders 24 hours, 7 A.M. Monday to midnight Friday; Saturday 8 to 4 (Eastern)
INFORMATION
Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Modem 325
FEBRUARY 1998
MD278A
MD278A-R2
MD278C

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the 325 and is the answer not in the manual?

Questions and answers

Related Manuals for Black Box 325

Summary of Contents for Black Box 325

  • Page 1 Technical support and fax orders 24 hours a day, 7 days a week SUPPORT Phone orders 24 hours, 7 A.M. Monday to midnight Friday; Saturday 8 to 4 (Eastern) INFORMATION Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018...
  • Page 2 FEDERAL COMMUNICATIONS COMMISSION CANADIAN DEPARTMENT OF COMMUNICATIONS RADIO FREQUENCY INTERFERENCE STATEMENTS This equipment generates, uses, and can radiate radio frequency energy and if not installed and used properly, that is, in strict accordance with the manufacturer’s instructions, may cause interference to radio communication. It has been tested and found to comply with the limits for a Class A computing device in accordance with the specifications in Subpart J of Part 15 of FCC rules, which are designed to provide reasonable protection against such interference when the equipment is operated in a commercial environment.
  • Page 3 MODEM 325 AND MODEM 325 CARD TRADEMARKS Other product names mentioned in this manual may be trademarks or registered trademarks of their respective companies and are hereby acknowledged.

  • Page 4: Table Of Contents

    CONTENTS CONTENTS 1. Specifications............14 2.
  • Page 5 MODEM 325 AND MODEM 325 CARD 5.3.4 Carrier Detect ..........42 5.3.5 Received Data.
  • Page 6 CONTENTS 6.4.5 Command-Statement Buffer ........53 6.4.6 Backspace Key .
  • Page 7 MODEM 325 AND MODEM 325 CARD 6.11.11 Dial/Leased Line (&L)......... 76 6.11.12 Asynchronous/Synchronous Mode Selection (&M) .
  • Page 8 CONTENTS 7. Status Registers ............96 7.1 How S-Registers Work .
  • Page 9 MODEM 325 AND MODEM 325 CARD 7.2.51 S65-66............114 7.2.52 Link Speed Status (S67).
  • Page 10 CONTENTS Appendix B: Troubleshooting ..........138 B.1 Telephone Interface.

  • Page 11: Specifications

    MODEM 325 AND MODEM 325 CARD 1. Specifications —9600 trellis coded, 9600 and 4800 uncoded as stated in CCITT recommendation Modem Data Rates V.32, 2400 and 1200 compatible with CCITT recommendation V.22 bis, 300 as stated in Bell specification —9600, 4800, 2400 QAM with suppressed carrier (V.32, V.22 bis compliant), 1200 PSK,...

  • Page 12: Introduction

    2. Introduction 2.1 General The Modem 325 and Modem 325 Card are versatile, secure, and reliable modems that can operate full duplex on both dial-up and leased lines. The modems are compatible with all required standards and recommendations and offer a wide variety of automatic, remote, and backup capabilities. The most notable characteristics are MNP error-control protocols through Level 5 data compression.
  • Page 13 MODEM 325 AND MODEM 325 CARD Figure 2-1. Front Panel. TELSET/ LEASED LINE FUSE DIAL 1/4 AMP 115 VAC 1/4 AMP 60 HZ Figure 2-2. Rear Panel.

  • Page 14: How To Use This Manual

    CHAPTER 2: Introduction 2.3 How to Use This Manual 2.3.1 S PECIFICATIONS Modem specifications are listed in Chapter 1 2.3.2 O PTION ELECTION Four methods of selecting or changing modem options are available. You need to read only the part of the manual that deals with the method you’ve chosen.

  • Page 15: Installation

    MODEM 325 AND MODEM 325 CARD 3. Installation 3.1 General This chapter provides information for the mechanical and electrical installation of the modem. 3.2 Site Selection Install the modem within 6 feet of a 115- or 230-VAC grounded outlet as required for the specific model and no farther than 50 feet from the terminal equipment.

  • Page 16: Ac Power Connection

    CHAPTER 3: Installation AC P OWER ONNECTION Power is supplied through a 6-foot line cord with a grounded 3-wire plug. If chassis ground is available through the third prong of the plug, a separate ground wire is not required. CAUTION To protect the DC-to-DC converter from reverse-polarity damage, make sure that the positive and negative leads are properly connected.
  • Page 17 MODEM 325 AND MODEM 325 CARD MODEM MODEM TRANSMIT DATA (BA) DATA TERMINAL READY (CD) EXT TX CLOCK (DA) RECEIVE DATA (BB) TRANSMITTER RECEIVER TX CLOCK (DB) RECEIVE CLOCK (DD) REQUEST TO SEND (CB) CARRIER DETECT (CF) CLEAR TO SEND (CB)
  • Page 18 CHAPTER 3: Installation Table 3-1. Digital Interface Signal Descriptions. EIA-232D CCITT Signal Name Description V.24 Shield No connection Transmitted Data Serial digital data (to be modulated) from a data terminal or other digital data source: Synchronous data must be accompanied by the modem transmit clock (pin 15) or by an external data rate clock (pin 24).
  • Page 19 MODEM 325 AND MODEM 325 CARD Table 3-1 (continued). Digital Interface Signal Descriptions. EIA-232D CCITT Signal Name Description V.24 Signal Quality Indicator This circuit indicates probability of errors in the received data. A positive level indicates poor signal quality; a negative level indicates good signal quality.‡...

  • Page 20: Telephone Cables

    CHAPTER 3: Installation 3.5 Telephone Cables The cables used for connection between the modem and the various telco jacks are shown in Figure 3-3 The part number is printed on the cable. Part Number Modem Connection Mechanical Layout Telco Connection Telco Jack 6-PIN 8-PIN...

  • Page 21: Telephone Line Connection

    MODEM 325 AND MODEM 325 CARD 3.6 Telephone Line Connection The modem operates in one of three modes: • Permissive (PSTN) • Programmable (PSTN) • Private line Permissive and programmable modes are used on the dial-up Public Switched Telephone Network (PSTN).
  • Page 22 CHAPTER 3: Installation Telset/Leased Line 8-pin connector DTE Connector Dial 8-Pin Screws Connector TELSET/ Cable LEASED LINE DIAL FUSE Supplied with Telephone RJ-11C, RJ-45S, EIA-232 25-Pin or RJ-41S jack Connector to installed by telephone company Use the included cable with the RJ-11 jack, or EL08MS-0006.

  • Page 23: Leased-Line Connection

    MODEM 325 AND MODEM 325 CARD NOTE The modem is compatible with exclusion key phone arrangements. 3.6.4 L EASED ONNECTION Leased lines use either a 2-wire or 4-wire connection. The telephone company will install the leased line and wall jack at your site. The line connects to the modem at the 8-position TELSET/LEASED LINE jack.
  • Page 24 CHAPTER 3: Installation Dial Line (may be Telset/ used for dial Leased Line Included cable (must backup) use for leased-line connection) block TELSET/ LEASED LINE DIAL FUSE EIA-232 25-pin connector to DTE RJ-11C, RJ-45S, or Use the included cable with the RJ-11 RJ-41S jack, or EL08MS-0006.

  • Page 25: Option Selection

    MODEM 325 AND MODEM 325 CARD 4. Option Selection 4.1 General NOTE This chapter contains the options available by pushbutton in response to the LCD. There are four factory option sets to choose from. The modem is shipped configured to factory option set #1 (see Appendix D).
  • Page 26 CHAPTER 4: Option Selection Lock Clip Cover Lock Prong Chassis Bottom Figure 4-1. Removing the Cover. Figure 4-2. Option Strap Configuration.
  • Page 27 MODEM 325 AND MODEM 325 CARD Speaker Factory use only - Do not change Ground Option SIG GND CH GND Factory use only - Do not change QM Disable Option Tip and Ring NORM NORM/REV Figure 4-3. Strap Locations.

  • Page 28: Hardware Straps

    CHAPTER 4: Option Selection 4.3 Hardware Straps 4.3.1 T IP AND OLARITY Some telephones are sensitive to tip and ring polarity. If a dial tone is detected after dialing, reverse these two straps. NORM NORM Normal tip and Reverse tip ring connection and ring connection...

  • Page 29: Qm Disable Option

    MODEM 325 AND MODEM 325 CARD 4.3.3 QM D ISABLE PTION When enabled, the Quality Monitor (QM) output is connected to the EIA-232 (pin 11) interface. Disabled disconnects the QM output. Refer to for more QM information. Chapter 5 Table 3-1...
  • Page 30 CHAPTER 4: Option Selection NOTE Main Menu 1 does not scroll. The displays in Main Menu 1 show the current operating mode or status. These displays are the results of other selected options and are not themselves option selections. While operating in the option menu, pressing NO scrolls vertically down the columns in Table 4-1 and pressing YES advances horizontally across the columns.
  • Page 31 MODEM 325 AND MODEM 325 CARD Table 4-1 (continued). Menu Options. MAIN MENU SUBMENU SUBMENU ITEM S-REG ITEM OPTION COM. CARRIER RECEIVE LEVEL DISPLAYS — — DESCRIPTIONS NEAR END ECHO STATUS LEVEL FAR END ECHO LEVEL ESTIMATED DELAY FREQUENCY TRANSLATION...
  • Page 32 CHAPTER 4: Option Selection Table 4-1 (continued). Menu Options. MAIN MENU SUBMENU SUBMENU ITEM S-REG ITEM OPTION COM. MODIFY CHANGE MODEM FORCED ANSWER NORM ORIGIN CONFIGUR- OPTIONS? OR NORMAL FORCED *OR1 ATION (CONT) ORIGINATE ANSWER V.32 FAST TRAIN ENABLE, DIS *FT1, *FT AUTO RETRAIN ENABLE, DIS...
  • Page 33 MODEM 325 AND MODEM 325 CARD Table 4-1 (continued). Menu Options. MAIN MENU SUBMENU SUBMENU ITEM S-REG ITEM OPTION COM. CHANGE MNP MNP PROTOCOL ENABLE \N2, \N3 OPTIONS? DISABLE \N, \N1 (Async Only) AUTO FALLBACK/ DISCONNECT DISCONNECT FALLBACK TO (If MNP Proto En)
  • Page 34 CHAPTER 4: Option Selection Table 4-1 (continued). Menu Options. MAIN MENU SUBMENU SUBMENU ITEM S-REG ITEM OPTION COM. PARITY (Async) NO, EVEN, ODD — AT COMMAND ENABLE *NT1 DISABLE DIAL METHOD ASYNC DTR, &M1, &M2 (Sync) MANUAL, &M3 (Async allows V.25 BISYNC, &M4 DTR control)
  • Page 35 MODEM 325 AND MODEM 325 CARD Table 4-1 (continued). Menu Options. MAIN MENU SUBMENU SUBMENU ITEM S-REG ITEM OPTION COM. RTS/CTS DELAY 0 to 90 ms — (10 ms) DTE COMMANDED ENABLE *FB1 FALLBACK DISABLE OPTIONS RES/ RESTORED *RO1 RETND AT DISC...
  • Page 36 CHAPTER 4: Option Selection Table 4-1 (continued). Menu Options. MAIN MENU SUBMENU SUBMENU ITEM S-REG ITEM OPTION COM. CALL TIMEOUT 15, 30, 45, 60, 75, — — 90, 105, 120 SEC ANSWER RING #X MANUAL, 1, 2, 4, — 8, 16 801 V.32 TIMEOUT LONG, SHORT —...

  • Page 37: Option Selection

    MODEM 325 AND MODEM 325 CARD 4.6 Option Selection Options are selected by pressing the YES/NO buttons. When powered up, the modem will go to the selected display under the Main Menu 1 header in . Any time a Main Menu is displayed, Table 4-1 pressing NO scrolls through the Main Menus.

  • Page 38: Item Option

    CHAPTER 4: Option Selection 4.6.4 I PTION When in the Item Option column, respond to the prompt question on the LCD to either keep or change the current display. USE RECEIVE USE EXTERNAL USE INTERNAL YES INTERNAL TRANSMIT TRANSMIT TRANSMIT CLOCK CLOCK? CLOCK?

  • Page 39: Operation

    MODEM 325 AND MODEM 325 CARD 5. Operation 5.1 General This chapter contains a functional description of the modem. 5.2 Controls and Indicators The front panel houses the LCD panel and LED indicators. The power switch is located on the rear panel.

  • Page 40: Manual Dialing

    CHAPTER 5: Operation • Ensure the modem is installed according to the instructions in Chapter 3 • Turn on the computer and the modem. 5.4.1 M ANUAL IALING After turning the modem on the LCD shows the software version and advances to main menu 1. •...

  • Page 41: Flow Control

    MODEM 325 AND MODEM 325 CARD 5.6 Flow Control Flow control adjusts for differences in speed between the modem and DTE. The DTE can operate at a constant speed independent of the bit rate of the modem. Flow control works in both directions. The modem can start and stop the DTE transmitter and the DTE can start and stop the modem transmitter.

  • Page 42: 2-Wire Dial-Up Operation

    CHAPTER 5: Operation NOTE DTR must be held high in 2-wire leased line operation. This is accomplished by DTE control, wiring pin 20 of the digital interface cable high, or by selecting the option, IGNORES DTR. If DTR is terminal controlled, loss of synchronization can be corrected by cycling DTR.

  • Page 43: Operating Without Security

    MODEM 325 AND MODEM 325 CARD 5.11.1 O PERATING ITHOUT ECURITY The modem operates like a standard V.32 modem, except that several additional AT commands are available to access security. With these commands, any user can set the passwords and turn security on when the modem is not already secure.

  • Page 44: Security Reset

    CHAPTER 5: Operation 5.11.7 S ECURITY ESET The only security operation available through the front-panel menu is RESET SECURITY. If you forget both passwords, this option will reset security to its initial state (off and with no passwords stored). This option is located under the LOAD FACTORY OPTIONS menu: RESET SECURITY?

  • Page 45: Dial Backup

    MODEM 325 AND MODEM 325 CARD 5.12 Dial Backup Dial backup allows the modem to switch to a dial-backup mode if the data connection on the leased line becomes unacceptable for communications. This can be accomplished in two ways: • Automatic—the modem can be set to switch to the backup line automatically after an extended loss of carrier or 4 unsuccessful retrains in 3 minutes •...

  • Page 46: Direct Connect With An Exclusion-Key Telephone

    CHAPTER 5: Operation 5.13.2 D IRECT ONNECT WITH AN XCLUSION ELEPHONE • Place the LCD in IDLE mode and the telephone in voice mode (pull the exclusion key button up). Wait for a dial tone. • Dial the number of the remote site. •...

  • Page 47: Call Termination

    MODEM 325 AND MODEM 325 CARD 5.15 Call Termination 5.15.1 C ONDITIONS ERMINATE The following conditions cause call termination: • Abort Disconnect Default 30 sec. Selectable (No answer, busy 1 to 30 sec. signal, no modem, etc.) • ATH Disconnect command.

  • Page 48: Asynchronous Operating Commands

    CHAPTER 6: Asynchronous Operating Commands 6. Asynchronous Operating Commands 6.1 General Most of the time, you will probably use your modem with communications software, Your software will configure the modem for you, or will offer you simple menu choices for configuring the modem. The software will also establish and maintain the communications link for you.

  • Page 49: Online Command Mode

    MODEM 325 AND MODEM 325 CARD 6.3.2 O NLINE OMMAND This mode is entered from the data mode by issuing the escape command. The data communication link remains established but data transmission is suspended. The modem will now accept commands as it does in the offline command mode.

  • Page 50: Autobaud

    CHAPTER 6: Asynchronous Operating Commands 6.4.2 A UTOBAUD The attention code (AT) is analyzed by the modem to determine the transmission speed, parity, and bits per character used by the DTE. This autobaud process is repeated each time the AT command prefix is sent.

  • Page 51: Repeating A Command (A/)

    MODEM 325 AND MODEM 325 CARD 6.4.7 R (A/) EPEATING A OMMAND This command tells the modem to repeat the last command stored in its buffer. It automatically reexecutes the command without retyping. The return key does not need to be pressed.

  • Page 52: Command Table

    CHAPTER 6: Asynchronous Operating Commands 6.5 Command Table is a listing of the AT commands used by the modem. Table 6-1 Table 6-1. AT Commands. Control General Description Page Command Number Repeat last command Escape code Go off hook in answer mode (answer immediately) Dial Local terminal echo Hang up...
  • Page 53 MODEM 325 AND MODEM 325 CARD Table 6-1 (continued). AT Commands Control Command General Description Page Number &G Guard tones &L Line type (telephone) &M Async/sync data and sync dial method &P Pulse-dial make/break ratio &R RTS to CTS delay &S...
  • Page 54 CHAPTER 6: Asynchronous Operating Commands Table 6-1 (continued). AT Commands Control Command General Description Page Number Transmit a break/set break length Auto-reliable buffer Modem port flow control Constant speed interface on/off Break control Operating mode Originate MNP link Serial-port flow control Serial-port ring indicate Inactivity timer Accept an MNP link...
  • Page 55 MODEM 325 AND MODEM 325 CARD Table 6-1 (continued). AT Commands Control Command General Description Page Number Enables or disables fast train DTE controlled local analog loopback Wait for dial-backup call (leased line) Controls line-current disconnect Dial autodial number (leased line)

  • Page 56: Response Commands

    CHAPTER 6: Asynchronous Operating Commands 6.6 Response Commands The modem communicates with the operator through response messages. These appear on the monitor or a computer printout to show the result of the command or action executed. Response messages can appear as words or as numbers. 6.6.1 H ESPONSE ESSAGES...

  • Page 57: Dial Parameter And Connect Speed Displays (X)

    MODEM 325 AND MODEM 325 CARD 6.6.5 D ARAMETER AND ONNECT PEED ISPLAYS Command Description Dial-tone and busy-signal detection not selected. CONNECT (code 1) response messages displayed for all speeds. Dial-tone and busy-signal detection not selected. Appropriate CONNECT response messages or codes displayed for data rate.

  • Page 58: Number Code Application (*Rc)

    CHAPTER 6: Asynchronous Operating Commands NOTE When an X2, X3, or X4 command is in effect, an appropriate CONNECT data-rate message or code is displayed as for X1. When a blind-dial command (X, X1, X3) is in effect, the modem waits 2 seconds or the time set by S6 and then dials.

  • Page 59: Response Number Codes/Messages

    MODEM 325 AND MODEM 325 CARD 6.6.7 R ESPONSE UMBER ODES ESSAGES Response number codes, messages, and their corresponding meanings are listed in . The Table 6-5 connect speeds indicated are the serial-port rate (DTE), not the DCE speed. Table 6-5. Response Codes/Messages.

  • Page 60: Dial Commands

    CHAPTER 6: Asynchronous Operating Commands 6.7 Dial Commands Dial commands let the modem originate a call to another modem. These commands can be used with either tone- or pulse-dial telephone systems. 6.7.1 D IALING To dial a number—for example, 555-1212, Enter AT D 555-1212 The modem dials the number, either pulse or tone, whichever is currently in effect, and takes the role of the originate modem.

  • Page 61: Tone Dialing (T)

    MODEM 325 AND MODEM 325 CARD 6.7.2 T IALING To tone-dial a number sequence, insert a T in the dial command. Enter AT D T 323-1111 In this example, the modem tone-dials the telephone number. The dialing method selected remains in effect until changed.

  • Page 62: Remaining In Command Mode

    CHAPTER 6: Asynchronous Operating Commands For example, you might enter a dollar amount for a banking transaction by entering AT D 1400 ; This sends the sequence 1400 and then returns to the command mode for further entries, according to the requirements of the banking service.

  • Page 63: Answering A Call

    MODEM 325 AND MODEM 325 CARD 6.8 Answering a Call There are three ways to answer a call for data connection: • Manual • AT command • Autoanswer The most common is autoanswer. 6.8.1 M ANUAL NSWER When the phone rings, answer by changing the front-panel switch from TALK to DATA after the first ring.

  • Page 64: Data Carrier Detect (&C)

    CHAPTER 6: Asynchronous Operating Commands 6.9.1 D (&C) ARRIER ETECT When using DCD to indicate a valid carrier, enter AT&C1. Some terminals and other devices require DCD on to communicate with the modem; if so, select &C. Table 6-7. Data Carrier Detect (&C). Command Operation &C...

  • Page 65: Data Terminal Ready (&D)

    MODEM 325 AND MODEM 325 CARD 6.9.3 D (&D) ERMINAL EADY In data mode, DTR may be used for modem control. Table 6-9. Data Terminal Ready (&D). Command Description &D Causes the modem to ignore DTR† &D1 Causes the modem to go to command mode from data mode when DTR goes from on to off.

  • Page 66: Request To Send/Clear To Send (&R)

    CHAPTER 6: Asynchronous Operating Commands 6.9.5 R (&R) EQUEST TO LEAR TO When the modem is operating in nonbuffered mode (direct mode), AT&R enables the RTS-to-CTS delay, determined by the value in S26. AT&R1 forces CTS high, and the modem ignores RTS. With AT&R2 selected, CTS goes high when carrier is detected.

  • Page 67: Test Commands (&T)

    MODEM 325 AND MODEM 325 CARD 6.10 Test Commands (&T) Diagnostic tests are used to isolate faults in the communications path. Diagnostic tests will terminate after the period of time specified by S18. If S18 is set to 0, the timer is disabled and tests will run continuously.

  • Page 68: Bilateral Test Enable/Disable (*An, *Dg)

    CHAPTER 6: Asynchronous Operating Commands 6.10.1 B (*AN, *DG) ILATERAL NABLE ISABLE Enables or disables bilateral test function. Table 6-14. Bilateral Test Enable/Disable. Command Operation Bilateral analog loop disabled† *AN1 Bilateral analog loop enabled Bilateral digital loop disabled† *DG1 Bilateral digital loop enabled †default 6.10.2 DTE-C 21) (*RD)

  • Page 69: General Commands

    MODEM 325 AND MODEM 325 CARD Table 6-16. DTE Controlled Local Analog Loopback (Pin 18) (*LA). Command Operation Ignore pin 18† *LA1 LAL enabled (pin 18) †default NOTE If the test timeout option is enabled and pin 18 remains high, the modem returns to idle mode at the end of the test timeout and then immediately reenters the test mode.

  • Page 70: Hanging Up (H)

    CHAPTER 6: Asynchronous Operating Commands Table 6-17. Bilateral Test Enable/Disable. Command Operation Echo off Echo on† †default 6.11.3 H ANGING To terminate a call, enter the command ATH. This tells the modem to disconnect and go on hook. The modem must be in command mode to use this command. 6.11.4 V.32 C (H2, H3) LEARDOWN...

  • Page 71: Speaker Volume (L)

    MODEM 325 AND MODEM 325 CARD 6.11.6 S PEAKER OLUME ATL commands offer three volume levels. Table 6-20. Speaker Volume (L). Command Operation L, L1 Speaker volume low Speaker volume medium† Speaker volume high †default 6.11.7 S PEAKER ONTROL ATM commands enable or disable the speaker for monitoring purposes.

  • Page 72: Long-Space Disconnect (Y)

    CHAPTER 6: Asynchronous Operating Commands 6.11.9 L PACE ISCONNECT One method of disconnecting two modems is called long-space disconnect. When any disconnect condition is detected by the local modem, it will send 4 seconds of data space condition to the remote modem before disconnecting.

  • Page 73: Dial/Leased Line (&L)

    MODEM 325 AND MODEM 325 CARD 6.11.11 D (&L) EASED If operating on dial-up lines, enter AT&L. If operating on leased lines, enter AT&L1 for 2-wire or AT&L2 for 4-wire. Table 6-24. Dial/Leased Line (&L). Command Operation &L Dial (switched)†...

  • Page 74: Make/Break Dial Pulse Ratio (&P)

    CHAPTER 6: Asynchronous Operating Commands 6.11.13 M (&P) REAK ULSE ATIO Using AT&P, the dial pulse is on for 39% and off for 61% of one cycle. Using AT&P1, the dial pulse is on for 33% and off for 67% of one cycle. Table 6-26.

  • Page 75: Disconnect Buffer Delay (%D)

    MODEM 325 AND MODEM 325 CARD Table 6-28. DCE Speed (%B). Command Operation Use DTE speed 300 bps 1200 bps 2400 bps 4800 bps 9600 bps 9600 trellis† †default 6.11.16 D (%D) ISCONNECT UFFER ELAY Sets a delay during which the modem will process data in its transmit and receive buffers before disconnecting.

  • Page 76: Auto Retrain (%E)

    CHAPTER 6: Asynchronous Operating Commands 6.11.17 A (%E) ETRAIN This option allows the modem to automatically retrain in response to poor received signal quality without a reconnection. The modem will always respond to a retrain request from the remote modem. Table 6-30.

  • Page 77: Talk/Data (*Da)

    MODEM 325 AND MODEM 325 CARD 6.11.21 T (*DA) The AT*DA command selects talk or data mode. Table 6-32. Talk/Data (*DA). Command Operation Switches modem to talk *DA1 Switches modem to data 6.11.22 D (*DB) ACKUP Determines whether dial-backup mode will be manual or automatic.

  • Page 78: Return To Leased Line From Dial Backup (*Lb)

    CHAPTER 6: Asynchronous Operating Commands 6.11.24 R (*LB) ETURN TO EASED ACKUP On dial-up lines, *LB causes the modem to return to leased line operation from dial backup. On leased lines with forced answer enabled, *LB causes the modem to wait for a dial backup call. 6.11.25 L (*LC) URRENT...

  • Page 79: Answer/Originate (*Or)

    MODEM 325 AND MODEM 325 CARD 6.11.28 A (*OR) NSWER RIGINATE Forces modem to answer or originate mode. This option is used with 2 or 4-wire leased line operation with error correction and/or dial backup. Table 6-37. Answer/Originate (*OR). Command Operation Force originate†...

  • Page 80: Reset To Stored Configuration (Z)

    CHAPTER 6: Asynchronous Operating Commands Factory Active User Option Set #1 Profile (1-9) Profile &W (to store) S0, S2, S7, &Y Reset/Powerup S9 ..S80 Z Immediate &F (1-9) &F (1-9) User Option Set #2 &W1 (to store) S0, S2, S7, &Y1 Powerup S9 .

  • Page 81: Load Factory Options (&F)

    MODEM 325 AND MODEM 325 CARD 6.12.3 L (&F) ACTORY PTIONS The AT&Fn command is used to load the factory option sets. Refer to for a complete list of Appendix C each set. Table 6-40. Load Factory Options (&F). Command Operation &F, &F1...

  • Page 82: Retaining/Restoring Options (*Ro)

    CHAPTER 6: Asynchronous Operating Commands AT*ND—Displays the stored numbers (1-9). NOTE Phone numbers stored using AT commands are limited to 34 characters. 6.12.6 R (*RO) ETAINING ESTORING PTIONS This option is used when the modem is shared by two or more DTEs. When options are retained, the current configuration is not altered at disconnect.

  • Page 83: Remote Configuration (%T=)

    MODEM 325 AND MODEM 325 CARD 6.13.2 R (%T=) EMOTE ONFIGURATION This mode of operation allows the modem user to view or modify the option set of a remote modem. Entering AT%T= (security code of remote) will initiate remote configuration.

  • Page 84: Serial Port (Dte) Bps Adjust (\J)

    CHAPTER 6: Asynchronous Operating Commands Table 6-46. Operating Mode (\N). Command Operation Normal mode (no error control): data is buffered Direct mode (no error control): data is not buffered Reliable mode (MNP only) Auto-reliable mode (try MNP then fall back to normal async) 6.14.2 S (DTE) (\J)

  • Page 85: Serial-Port Flow Control (\Q)

    MODEM 325 AND MODEM 325 CARD 6.14.4 S (\Q) ERIAL ONTROL Sets the type of flow control used by the serial port. If the serial-port speed exceeds that of the modem connection, characters may be sent by the DTE to the modem faster than it can send them to the remote modem.

  • Page 86: Xon/Xoff Passthrough (\X)

    CHAPTER 6: Asynchronous Operating Commands Table 6-50. XON/XOFF Passthrough (\X). Command Operation Process but do not pass XON/XOFF characters to remote DCE† Process and pass XON/XOFF characters to remote DCE †default 6.14.6 MNP D (%C) OMPRESSION To enable data compression while running MNP protocol, enter AT%C1. To disable data compression, enter AT%C.

  • Page 87: Break Control (\Kn)

    MODEM 325 AND MODEM 325 CARD Table 6-52. Auto-Reliable Fallback Character (%An). Command Operation Sets ASCII character to be recognized as the auto-reliable fallback character. NOTE The modem must be configured for auto-reliable mode (AT\N3). 6.14.8 B REAK ONTROL Use AT\Kn (n =0-5) to indicate the action taken by the modem when a break is encountered.
  • Page 88 CHAPTER 6: Asynchronous Operating Commands Table 6-54. Break-Control Command Effects. Command Effect \K, \K2, \K4 Enter command mode but do not send break to the remote modem Empty the data buffers and send break to the remote modem Immediately send break to the remote modem Send break to the remote modem in sequence with any data received from the serial port 2.

  • Page 89: Maximum Mnp Block Size (\A)

    MODEM 325 AND MODEM 325 CARD 4. If a transmit break command is issued while the modem is in command state during a reliable (MNP) or normal connection (no protocol, data buffered): Table 6-57. Break-Control Command Effects. Command Effect \K, \K1...

  • Page 90: Protocol Result Codes (\V)

    CHAPTER 6: Asynchronous Operating Commands 6.14.11 P (\V) ROTOCOL ESULT ODES Enables or disables protocol result codes. See Table 6-60 Table 6-60. Protocol Result Codes (\V). Command Operation Disable protocol result codes† Enable protocol result codes †default 6.14.12 T (\B) RANSMIT REAK REAK...

  • Page 91: Originate Mnp Link (\O)

    MODEM 325 AND MODEM 325 CARD 6.14.14 O MNP L (\O) RIGINATE The AT\O command forces the local modem to return online and initiate a MNP link regardless of whether it originated or answered the call. For this command to succeed, the remote modem must have received the AT\U command.

  • Page 92: Switch From Mnp To Normal (\Z)

    CHAPTER 6: Asynchronous Operating Commands 6.14.17 S (\Z) WITCH FROM ORMAL This command causes the modem to return online and switch from a reliable connection to a normal connection. Table 6-66. Switch from MNP to Normal (\Z). Command Operation Switch from MNP to normal NOTE If \J1 and \C are set, the \Z command forces the modem to the direct mode.

  • Page 93: Status Registers

    MODEM 325 AND MODEM 325 CARD 7. Status Registers Most users can skip this chapter. Your communications software, or the AT commands described in , will be enough to configure your modem for everything you need it to do. Chapter 6 However, manipulating the status registers (usually called “S-registers”) directly gives programmers...

  • Page 94: S-Register Operation

    CHAPTER 7: Status Registers 7.2 S-Register Operation To read a register value: Enter ATSn? (n=register number) for decimal value ATSn?^ for hexadecimal value For example, to determine the current backspace character Enter ATS5? The screen will show the ASCII value of the backspace character stored in register S5. To change (write to) a register value: Enter ATSn=v (n=register number, v=decimal value) ATSn=^v (^v=hexadecimal value)

  • Page 95: Autoanswer (S0=0-255)

    MODEM 325 AND MODEM 325 CARD NOTE This method of option selection can be used on all S-registers except read-only registers. 7.2.2 A (S0 = 0-255) UTOANSWER This register turns autoanswer on or off. Set the register to 0 to turn autoanswer off.

  • Page 96: Pause Interval For Comma (S8=0-255)

    CHAPTER 7: Status Registers 7.2.10 P (S8 = 0-255) AUSE NTERVAL FOR OMMA When a dial command contains a comma, the modem pauses the number of seconds in S8. Change S8 to change the basic pause interval (0-255), or use several commas in a row for greater delay during dialing. The default value is 2 (seconds).

  • Page 97: S14 (Bit-Mapped Options)

    MODEM 325 AND MODEM 325 CARD 7.2.16 S14 (B APPED PTIONS Table 7-2. S14 (Bit-Mapped Option). Value Command Description — — Reserved Local character echo off †1 Local character echo on †0 Response displays on Response displays off Response digit messages †1...

  • Page 98: System Tests (S16)

    CHAPTER 7: Status Registers 7.2.18 S (S16) YSTEM ESTS Contains the status of system-test settings. Table 7-3. System Tests (S16). Value Command Description — Analog loopback inactive Analog loopback in progress — — Reserved Digital loopback inactive Digital loopback in progress Slaved digital loopback inactive Slaved digital loopback in progress Remote digital loopback inactive...

  • Page 99: Test Timeout (S18)

    MODEM 325 AND MODEM 325 CARD 7.2.20 T (S18) IMEOUT Amount of time (0-255), in 1-second increments, that a diagnostic test will run. A value of 0 disables the timer. The default value is 0. 7.2.21 S19, 20 Not used 7.2.22 S21 (B...

  • Page 100: S22 (Bit-Mapped Options)

    CHAPTER 7: Status Registers 7.2.23 S22 (B APPED PTIONS Table 7-5. Bit Mapped (S22). Value Command Description 1, 0 Speaker volume low Speaker volume low †10 Speaker volume medium Speaker volume high 3, 2 Speaker off †01 Speaker on until carrier detect Speaker always on Speaker off when modem is dialing 6, 5, 4...

  • Page 101: S24

    MODEM 325 AND MODEM 325 CARD 7.2.25 S24 Not used 7.2.26 DTR S (S25) TATE ECOGNITION The S25 register specifies the amount of time (0-255) in 0.01-second (10-ms) increments that DTR must stay high or low in order to be recognized as such. The default value is 5 (0.05 second).

  • Page 102: Loopback Timer (S28)

    CHAPTER 7: Status Registers 7.2.29 L (S28) OOKBACK IMER Amount of time in 1-minute increments that the modem will remain in dial-backup mode before retrying leased-line mode. This is only used if automatic dial backup is enabled. A zero will disable automatic lookback to leased-line mode.

  • Page 103: S30 (Bit-Mapped Options)

    MODEM 325 AND MODEM 325 CARD 7.2.31 S30 (B APPED PTIONS Table 7-10. S30 (Bit-Mapped Options). Value Command Description — — Reserved †0 V.25 ASCII V.25 EBCDIC — — Reserved †0 NRZI 7, 6 V.25 disabled &M4 V.25 Bisync †10 &M5...

  • Page 104: S32 (Bit-Mapped Options)

    CHAPTER 7: Status Registers 7.2.33 S32 (B APPED PTIONS Table 7-11. S32 (Bit-Mapped Options). Value Command Description &L1 2-wire (leased line only) &L2 4-wire (leased line only) *LC1 Line current disconnect=short †1 *LC2 Line current disconnect=long Line current disconnect=disable †1 *LC1 Line current disconnect=enable or *LC2...

  • Page 105: S34 (Bit-Mapped Options)

    MODEM 325 AND MODEM 325 CARD 7.2.35 S34 (B APPED PTIONS Table 7-12. S34 (Bit-Mapped Options). Value Command Description †0 Bilateral analog=disable *AN1 Bilateral analog=enable †0 Bilateral digital=disable *DG1 Bilateral digital=enable †0 DTE commanded LAL=disable *LA1 DTE commanded LAL=enable DTE commanded RDL=disable...

  • Page 106: S52 (Bit-Mapped Options)

    CHAPTER 7: Status Registers 7.2.39 S52 (B APPED PTIONS Selects leased-line transmit level from 0 to -15 dBm in 1-dB increments. Table 7-14. S52 (Bit-Mapped Options). Value Command Description †0 to *TLn Transmit level in dB (n=0-15) 0 dB through -15 dB) —...

  • Page 107: Flow Control (S54)

    MODEM 325 AND MODEM 325 CARD 7.2.41 F (S54) ONTROL Selects flow-control options. Table 7-16. Flow Control (S54). Value Command Description 1, 0 Disable DTE flow control Enable DTE XON/XOFF flow control Enable DTE CTS flow control Enable bilateral CTS/RTS flow control —...

  • Page 108: Mnp Inactivity Timer (S58)

    CHAPTER 7: Status Registers 7.2.44 MNP I (S58) NACTIVITY IMER Specifies the number of minutes the modem waits before terminating a call when no data is sent or received. 0 disables timer. AT\Tn load inactivity timer, n=0-255 minutes. Table 7-18. MNP Inactivity Timer (S58). Value Command Description...

  • Page 109: S60 (Bit-Mapped Options)

    MODEM 325 AND MODEM 325 CARD 7.2.46 B (S60) APPED Table 7-20. Bit Mapped (S60). Value Command Description Disable auto retrain †1 Enable auto retrain Disable data compression †1 Enable data compression †0 Disable auto reliable data buffer Buffer data for 4 seconds or 200 characters...

  • Page 110: Dte Speed (S61)

    CHAPTER 7: Status Registers 7.2.47 DTE S (S61) PEED Indicates DTE rate. Works in conjunction with the DCE rate in S69. This register is read-only. Table 7-21. DTE Speed (S61). Value Command Description 2, 1, 0 0-300 1200 2400 4800 —...

  • Page 111: Maximum Mnp Block Size (S63)

    MODEM 325 AND MODEM 325 CARD 7.2.49 M MNP B (S63) AXIMUM LOCK Sets maximum transmit block size. Table 7-23. Maximum MNP Block Size (S63). Value Command Description Maximum block size=64 Maximum block size=128 Maximum block size=192 †255 Maximum block size=256 †default...

  • Page 112: Dce-Independent Speed (S69)

    CHAPTER 7: Status Registers 7.2.54 DCE-I (S69) NDEPENDENT PEED Selects DCE-independent rate operation. When S69 is 0, DTE and DCE rates are equal and the maximum originate connect rate is determined by S61. When S69 is non-zero, the maximum originate connect rate is determined by S69.

  • Page 113: Operating Mode Status (S71)

    MODEM 325 AND MODEM 325 CARD 7.2.56 O (S71) PERATING TATUS Indicates level of MNP error-controlling protocol. This register is read-only. Table 7-28. Operating Mode Status (S71). Value Command Description 2, 1, 0 No MNP Negotiating MNP MNP level 2...

  • Page 114: Autocallback Timer (S78)

    CHAPTER 7: Status Registers 7.2.59 A (S78) UTOCALLBACK IMER Specifies the time in seconds that the modem waits for autocallback. Default is 30 seconds. Table 7-30. Autocallback Timer (S78). Value Command Description 0-255 Time in seconds to wait for autocallback 7.2.60 B (S79) REAK...

  • Page 115: S84 (Bit-Mapped Options)

    MODEM 325 AND MODEM 325 CARD 7.2.62 S84 (B APPED PTIONS Table 7-32. S84 (Bit-Mapped Options). Value Command Description 0† Any-key abort enabled Any-key abort disabled 0† Remote DCD goes low in RDL and remote configuration Remote DCD stays high in RDL and remote configuration 0†...

  • Page 116: Bis Autodialer

    CHAPTER 8: V.25 bis Autodialer 8. V.25 bis Autodialer 8.1 General V.25 bis is an option that allows dialing functions to be controlled using synchronous data. Select this option by the front panel LCD or by the appropriate &M command in the AT command set see Section 6.11.12 If using the LCD: •...

  • Page 117: Explanations Of Invalid Responses

    MODEM 325 AND MODEM 325 CARD • Each response below is considered an individual message per V.25 bis conventions. A dial command with intermediate call progress enabled is illustrated: From DTE To DTE <sy><sy><stx>CRN<sp>(205)555-0124<etx> <sy><sy><stx>VAL<etb> <sy><sy><stx>CNX<sp>@9600BPS<etx> • Spaces in a command from the DTE are optional and ignored.

  • Page 118: Dial Parameters

    CHAPTER 8: V.25 bis Autodialer 8.3 Dial Parameters describes the parameters used in autodialing. The memory available for dialing can hold up to Table 8-1 40 characters. Parameters inserted for readability are not counted. Table 8-1. V.25bis Dial Parameters. Character Function 0 through 9 DTMF and pulse digit...

  • Page 119: Bis Command And Response Definitions

    MODEM 325 AND MODEM 325 CARD 8.4 V.25 bis Command and Response Definitions The following sections describe the commands used with the V.25 bis autodialer and explain the responses received when each command is executed. 8.4.1 D (CRN OMMAND The dial command is CRN followed by the number to be dialed ( .

  • Page 120: Program Number Command

    CHAPTER 8: V.25 bis Autodialer 8.4.2 P (PRN ROGRAM UMBER OMMAND The program number command is PRN followed by the one-digit decimal address ( ) and the number to be stored ( . Each address can store up to 32 dial parameters. Ignored characters in the dial nn .

  • Page 121: Disregard Incoming Call (Dic)

    MODEM 325 AND MODEM 325 CARD If no number is stored at the specified address, nothing is returned for that address. The separator {sep} is a <etb><sy><sy><stx>LSN<sp> sequence for BISYNC format (the last LSN string terminates with <etx> per V.25 bis. For synchronous bit-oriented operation, each LSN string is treated as an individual message per V.25 bis.

  • Page 122: Link Number By Address

    CHAPTER 8: V.25 bis Autodialer Failure response is {sep} ;{call progress messages}... where is the recall count (1 < = r < = n ; 1, 2..., etc.), followed by a separator field <etb><sy><sy><stx> and call progress messages (CFI, etc.). If the call fails to connect, this is repeated for the specified number of times.

  • Page 123: Request List Of Linked Numbers (Rll)

    MODEM 325 AND MODEM 325 CARD INVPV Invalid command—parameter value error. Examples: PRL 1;Q PRL Q;1 PRL 1;45 where only addresses 01 - 09 are defined 8.4.10 R (RLL) EQUEST IST OF INKED UMBERS The request list of linked numbers command is RLL without parameters.

  • Page 124: Modem Options Command

    CHAPTER 8: V.25 bis Autodialer 8.5 Modem Options Command (PRO xxx;yy;0;0...) The program options command is PRO followed by the starting register address (1 to 3 decimal digits), option count (1 or 2 decimal digits) and the data for each option (1 to 3 decimal digits per option). The Options section below lists all available options with definitions, possible settings, and default values.

  • Page 125: Save Current Settings (Prk)

    MODEM 325 AND MODEM 325 CARD This invalid message can be returned when a block of options is being changed. The conditions for this invalid response are as follows: • An undefined option number is specified. In the example above, if option 12 is undefined for a certain modem (and no other error conditions apply) options 10 and 11 would be changed as specified in the command message.

  • Page 126: Request List Of Stored Options (Rlo N)

    CHAPTER 8: V.25 bis Autodialer INVMS Invalid command—message syntax error. Examples: PRP;1 PRP Q INVPS Invalid command—parameter syntax error. Examples: PRP 1; PRP 1;1 PRP 001 INVPV Invalid command—parameter value error. Example: PRP 5 where factory default 5 is not defined for the modem. Current modem factory options are 1, 2, 3, and 4.

  • Page 127: Options

    MODEM 325 AND MODEM 325 CARD LSO List stored options. The separator {sep} is a <etb><sp><sp><stx>LSO<sp> sequence for the sync format (the last LSO string terminates with <etx> per V.25 bis). For synchronous bit-oriented operation, each LSO string is treated as an individual message per V.25 bis.
  • Page 128 CHAPTER 8: V.25 bis Autodialer 021 - 022: Not applicable 023 - 049: Reserved for future use. 050: Mode 0 - 2-wire dial-up operation (PSTN) 1 - 4-wire leased line operation 2 - 2-wire leased line operation Default value = 0 051: Primary transmit / receive rate (See the...
  • Page 129 MODEM 325 AND MODEM 325 CARD 077: Speaker volume 0 - Low 1 - Medium 2 - High Default value = 1 078 - 084: Not applicable 085: Constant carrier RTS/CTS delay 0 to 250 ms Must be set in increments of 10 ms: 10, 20, 30 .
  • Page 130 CHAPTER 8: V.25 bis Autodialer 096: DTR dial 0 - Disable 1 - Enable 2 - N/A Default value = 0 097: Not applicable 098: Call timeout 0 - Off 1-255 sec Default value = 30 sec 099 - 102: Not applicable 103: Signal quality retrain...

  • Page 131: Rate Select

    MODEM 325 AND MODEM 325 CARD 907: Test timer 0 - Until DTR drops 1 to 255 sec Default value = 0 908: Not applicable Options 909-999 are reserved for future use. ELECT 000 - 006: Not applicable 007: V.22...

  • Page 132: Protocols

    CHAPTER 9: Protocols 9. Protocols 9.1 MNP Reliable Mode MNP (Microcom Networking Protocol) provides error detection and automatic retransmission of data upon detection of an error. The modem supports MNP levels 2, 3, 4 and 5. Level 2 is the asynchronous version.

  • Page 133: Maintenance

    MODEM 325 AND MODEM 325 CARD 10. Maintenance WARNING Disconnect power before performing maintenance. Although dangerous voltage levels are not exposed, disconnecting power will ensure no electric shock hazard is present. The modem contains no internal electronic components that can be serviced or replaced by the user.

  • Page 134: Appendix A: Phone Jack Descriptions

    APPENDIX A: Phone Jack Descriptions Appendix A: Phone Jack Descriptions A.1 Dial-Line Pin Functions The 8-pin phone jack connects to the PSTN dialup lines. Pin functions for this jack are: Pins 1, 2—Not used Pin 3 MI—Switch hook on exclusion-key telephone Not used in some systems Pin 4 R—Ring side of telephone line Pin 5 T—Tip side of telephone line...

  • Page 135: Appendix B: Troubleshooting

    MODEM 325 AND MODEM 325 CARD Appendix B: Fault Isolation Procedure This diagnostic test procedure and the indicator lights built into the modem allow a rapid check of the terminals, modems, and telephone-line interface. This procedure can be used to verify normal system operation and to isolate faulty equipment in case of failure.

  • Page 136: Modem And Telephone Line Check

    APPENDIX B: Fault Isolation Procedure B.5 Modem and Telephone Line Check Step 1: Configure the modem for LOCAL ANALOG LOOP WITH TEST PATTERN. This terminates the local modem telephone lines into 600 ohms and connects the local modem transmit output amplifier back to its own receiver through the AGC.
  • Page 137 MODEM 325 AND MODEM 325 CARD Step 2 This step determines the performance of the local and remote modems and the telephone circuits. It also determines each modem’s ability to receive a transmitted signal from the other site, properly equalize and decode the signal, and then loop this regenerated signal into the transmitter for transmission back to the other modem.
  • Page 138 APPENDIX B: Fault Isolation Procedure Step 3 This step determines the performance of the telephone line. This test is valid for 4-wire operation only. Configure the modem for REMOTE ANALOG LOOP WITH TEST PATTERN. This signals the remote to connect its receive pair to its transmit pair through a gain amplifier stage. The test pattern transmitted locally is now looped back to the local modem.

  • Page 139: Appendix C: Command Index And Defaults

    MODEM 325 AND MODEM 325 CARD Appendix C: Command Index and Defaults C.1 General This guide provides async command characters and their meanings. Pages listed provide initial information on the commands. S-registers are listed as a cross reference. † indicates factory defaults.
  • Page 140 APPENDIX C: Command Index and Defaults Command Page S-Reg Description L or L1 Speaker volume low Speaker volume medium† Speaker volume high Speaker off Speaker off when carrier is present Speaker always on Speaker off when dialing and carrier is present Restore data mode (after escape) Response displays on†...
  • Page 141 MODEM 325 AND MODEM 325 CARD Command Page S-Reg Description &D DTR ignored† &D1 DTR recalls command mode &D2 DTR disconnects &D3 DTR disconnects and resets modem to stored configuration &F or &F1 Restore factory configuration 1† &F2 Restore factory configuration 2 &F3...
  • Page 142 APPENDIX C: Command Index and Defaults Command Page S-Reg Description &T Terminate any test or exit remote configuration mode &T1 Initiate analog loopback &T2 Initiate remote analog loopback &T3 Initiate digital loopback &T4 Allow acceptance of remote commanded digital loopback† &T5 Denies acceptance of remote commanded digital loopback...
  • Page 143 MODEM 325 AND MODEM 325 CARD Command Page S-Reg Description Sets security code to value entered after equal sign (0-99999999) %P=D Disabled Displays security code of local modem Transmit test pattern Followed by a security code, establishes remote configuration Display product revision level Display product serial number Permissive†...
  • Page 144 APPENDIX C: Command Index and Defaults Command Page S-Reg Description Normal mode Direct mode Reliable only Auto reliable mode† Originate on reliable link Disable DTE flow control Enable DTE XON/XOFF flow control† Enable DTE CTS flow control Enables bilateral CTS/RTS flow control RI, blinks for ring and remains on for duration of call RI, blinks for ring and turns off when call is answered†...
  • Page 145 MODEM 325 AND MODEM 325 CARD Command Page S-Reg Description Disables bilateral digital loop† *DG1 Enables bilateral digital loop Ignore pin 23† *FB1 Pin 23 transition causes DTE speed fallback Disable fast train† *FT1 Enable fast train Ignore pin 18†...

  • Page 146: Status Registers

    APPENDIX C: Command Index and Defaults Command Page S-Reg Description $E=x Enables security where x is either password Displays the current security status $D=x Disables security where x is either password Reset security Displays the current status of security C.2 Status Registers S-Reg RO/RW Page...
  • Page 147 MODEM 325 AND MODEM 325 CARD S-Reg RO/RW Page Function Factory-Default Option Set #1 Bit mapped Bit Mapped DTR recognition time 5 (0.5 sec) RTS/CTS delay Bit mapped Lookback timer 15 min Bit mapped Bit mapped Bit mapped Bit mapped...

  • Page 148: V.25 Bis Dialer Commands

    APPENDIX C: Command Index and Defaults S-Reg RO/RW Page Function Factory-Default Option Set #1 Auto-reliable fallback character 0 Link speed status DCE speed Operating mode Operating mode status Bit mapped Autocallback timer Break length Bit mapped RO=Read-Only RW=Read or Write C.3 V.25 bis Dialer Commands Synchronous Command Page...
  • Page 149 MODEM 325 AND MODEM 325 CARD Synchronous Command Page Description CRS a Dial stored number (a=address) Disregard incoming call Save current option settings PRL a;b Link number at address a with number at address b PRN a; nn...n Program number (nn...n=number to be dialed, a=address) PRO xxx;yy;0;0...

  • Page 150: Factory Option Sets

    APPENDIX C: Command Index and Defaults C.4 Factory Option Sets Factory Option Set #1 (Asynchronous Dialup with MNP) • Modem Options DCE rate—9600 Normal originate Fast train originate Auto retrain enabled Transmit clock internal Dial line Jack type RJ-11 (permissive) Line current disconnect long enabled Long space disconnect enabled V.22 guard tone disabled...
  • Page 151 MODEM 325 AND MODEM 325 CARD • Speaker Options Volume medium On until carrier detect Factory Option Set #2 (Asynchronous Dialup Without MNP) • Modem Options DCE rate=DTE rate* Normal originate Fast train disabled Auto retrain enabled Transmit clock internal...
  • Page 152 APPENDIX C: Command Index and Defaults DTE fallback disabled Options retained at disconnect • Speaker Options Volume medium On until carrier detect Factory Option Set #3 (Synchronous Dialup Without MNP) • Modem Options DCE rate—9600 trellis Normal originate Fast train disabled Auto retrain enabled Transmit clock internal Dial line...
  • Page 153 MODEM 325 AND MODEM 325 CARD RTS/CTS delay 0 ms* DTE fallback disabled Options retained at disconnect • Speaker Options Volume medium On until carrier detect Factory Option Set #4 (Synchronous 4-Wire Leased Line without MNP) •Modem Options DCE rate—9600 trellis...
  • Page 154 APPENDIX C: Command Index and Defaults Ignores DTR DSR normal* DCD normal* CTS follows RTS* RTS/CTS delay 0 ms* DTE fallback disabled Options retained at disconnect • Speaker Options Volume medium On until carrier detect *Different from Factory Option Set #1...

  • Page 155: Appendix D: Abbreviations And Acronyms

    MODEM 325 AND MODEM 325 CARD Appendix D: Abbreviations and Acronyms —Abort Time or Answer Back Tone —Alternating Current —Acknowledgement, Positive —Abort Call, Retry —Automatic Call Unit —Analog to Digital —Address Field —Address ADDR —Automatic Gain Control —American Standard Code for Information Interchange ASCII —American Telephone and Telegraph...
  • Page 156 APPENDIX D: Abbreviations and Acronyms —Call Failure Indication—Local DCE Busy CFICB —Call Failure Indication—No Dial Tone CFIDT —Call Failure Indication—No Answer Back Tone CFINT —Call Failure Indication—Ringback Detected CFIRT —Chassis Ground Ch Gnd —Connect Incoming Call —Complementary Metal Oxide Semiconductor CMOS —Connect Complete —Computer Output Microfilm...
  • Page 157 MODEM 325 AND MODEM 325 CARD —Digital Data Service/Multi Rate DDS/MR —Disregard Incoming Call —Dual In-line Package —Disable DIS, DS —Data Link Escape —Data Line Occupied —Digital Multiplexor System —Department of Communications (Canada) —Disk Operating System —Digit Present —Data Rate Select —Data Set Ready...
  • Page 158 APPENDIX D: Abbreviations and Acronyms —External Transmit Clock —End of Text —External —Feature Activator —Fallback —Federal Communications Commission —Frequency Division Modulation —Full-Duplex Transmission —Form Feed —Frame Ground FGND —Flag —Fixed loss loop —Frequency Modulation —Test message (“The quick brown fox jumps over the lazy dog 0123456789”) Fox message —Frequency-Shift Keying —Foreign Exchange...
  • Page 159 MODEM 325 AND MODEM 325 CARD —Link Access Protocol-D Channel LAPD —Link Access Protocol for Modems LAPM —Loopback Options LB OPTS —Liquid Crystal Display or Line Current Disconnect —Local Digital Loopback —Limited-Distance Modem —Light Emitting Diode —Line Feed —Analog Telephone Line Connection LINK —Local Loopback...
  • Page 160 APPENDIX D: Abbreviations and Acronyms —Out of Service —Private Branch Exchange —Personal Computer —Printed Circuit (board) —Power Indication —Pseudo random —Present Next Digit —Plain Old Telephone Service POTS —Primary —Program Option —Programmable PROG, PR —Programmable Read Only Memory PROM —Restored Factory Straps —Power/Test Mode/Error PR/TM —Phase Shift Keying...
  • Page 161 MODEM 325 AND MODEM 325 CARD —Request List of Stored Options —Received Line Signal Detector RLSD —Request List of Version —Root-Mean-Square —Remote Loopback RMT LB —Ringback Detection —Receive Only —Read Only Memory —Remote Terminal —Request to Send RTS, RS —Receive —Reference Designator...
  • Page 162 APPENDIX D: Abbreviations and Acronyms —Telephone Company TELCO —Telephone Set TELSET —Test Mode —Test Pattern —Terminal Ready —Test —Temporary Text Delay —Transistor-to-Transistor Logic —Transmit —Reference Designator —Universal Asynchronous Receiver/Transmitter UART —Universal Service Ordering Code USOC —CCITT Code Designation —List of definitions for interchange circuits between data terminal equipment and data circuit- V.24 terminating equipment (and provisional amendments, May 1977) —Volts Alternating Current...

  • Page 163: Appendix E: Ascii And Ebcdic Character Table

    MODEM 325 AND MODEM 325 CARD Appendix E: ASCII and EBCDIC Character Table Table E-1. Hexadecimal Equivalents of Binary and Decimal Numbers. Binary Decimal Hexadecimal 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110...
  • Page 164 APPENDIX E: ASCII and EBCDIC Character Table The following table lists the ASCII decimal, hexadecimal, equivalent character values, and EBCDIC characters. The table only goes as high as available keyboard symbols. Control keys are shown in the right column of the first table. Table E-2.
  • Page 165 MODEM 325 AND MODEM 325 CARD Table E-2 (continued). ASCII and EBCDIC Characters. ASCII Symbol Decimal EBCDIC Control Key (DC4) RE (restore) (NAK) NL (new line) (SYN) BS (backspace) (ETB) IL (light) (CAN) CN (cancel) (EM) EM (end of message)
  • Page 166 APPENDIX E: ASCII and EBCDIC Character Table Table E-2 (continued). ASCII and EBCDIC Characters. ASCII Symbol Decimal EBCDIC CP (bypass) LF (line feed) & EB (end of block) ‘ EC (escape) — — C2 (CU2) — EQ (enquiry) AK (acknowledgement) BL (bell) —...
  • Page 167 MODEM 325 AND MODEM 325 CARD Table E-2 (continued). ASCII and EBCDIC Characters. ASCII Symbol Decimal EBCDIC — C3 (CU3) < D4 (device control 4) NK (no acknowledgement) > — SB (substitute) space — — — — — — —...
  • Page 168 APPENDIX E: ASCII and EBCDIC Character Table Table E-2 (continued). ASCII and EBCDIC Characters. ASCII Symbol Decimal EBCDIC — & (ampersand) — — — — (leading pad) — — — — ! (exclamation) $ (dollar sign) * (asterisk) ) (close parenthesis) ;...
  • Page 169 MODEM 325 AND MODEM 325 CARD Table E-2 (continued). ASCII and EBCDIC Characters. ASCII Symbol Decimal EBCDIC (DC4) RE (restore) — — — — — > ACK0 — — — — — — — —...
  • Page 170 APPENDIX E: ASCII and EBCDIC Character Table Table E-2 (continued). ASCII and EBCDIC Characters. ASCII Symbol Decimal EBCDIC ‘ (single quote) : (colon) # (pound) @ (at) ' (apostrophe) = (equal) " (double quote) — — — — — — —...
  • Page 171 MODEM 325 AND MODEM 325 CARD Table E-2 (continued). ASCII and EBCDIC Characters. ASCII Symbol Decimal EBCDIC — † — — — — — — — — — — — — — — — — — — ± — —...
  • Page 172 APPENDIX E: ASCII and EBCDIC Character Table Table E-2 (continued). ASCII and EBCDIC Characters. — — — — — — — — — — ≥ (greater than or equal) — — • — S0 (SM0) — S1 (SM1) — S2 (SM2) —...
  • Page 173 MODEM 325 AND MODEM 325 CARD Table E-2 (continued). ASCII and EBCDIC Characters. ASCII Symbol Decimal EBCDIC — — ] (close bracket) ≠ (not equal) — — — — { (open brace) — — — — — — — —...
  • Page 174 APPENDIX E: ASCII and EBCDIC Character Table Table E-2 (continued). ASCII and EBCDIC Characters. ASCII Symbol Decimal EBCDIC — — — — — — — — — — — — — — — — — — — — — — \ (backslash) —...
  • Page 175 MODEM 325 AND MODEM 325 CARD Table E-2 (continued). ASCII and EBCDIC Characters. ASCII Symbol Decimal EBCDIC — — — — — — — — (unprintable character) — — — — — — — — — — — — —...
  • Page 176 APPENDIX E: ASCII and EBCDIC Character Table Table E-2 (continued). ASCII and EBCDIC Characters. ASCII Symbol Decimal EBCDIC — — — — — (trailing pad)
  • Page 177 ©Copyright 1998. Black Box Corporation. All rights reserved. 1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746...

This manual is also suitable for:

325 card

Table of Contents