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Summary of Contents for Digicom SNM15
- Page 1 SNM15 OPERATION MANUAL SNM15 rev.1.0 del 07/91 COD.7D0548...
- Page 2 The contents of this booklet may be modified without prior permission. Every possible care has been taken in testing and putting together all the documentation contained in this booklet, however DIGICOM can not take any responsability brought by the use of this booklet.
- Page 3 INDEX INTRODUCTION OVERALL FEATURES Mechanical Dimensions Environmental Conditions Mains Power Supply Analog Interface Control and Warning Devices FUNCTIONAL FEATURES Operational Modes Error correction and data compression CCITT V.42 and V.42bis INSTALLATION introduction Connection to the DTE Data Terminal Connecting to the Telephone Line and Telephone Operational Test USE OF THE MODEM introduction...
- Page 4 V.25 bis Introduction Duties of the DTE Definitions and Operational Modes ASYNCHRONOUS V.25BIS COMMANDS Separators 6.12 ASINCHRONOUS V.25BIS INDICATIONS 6.13 SYNCHRONOUS V.25BIS COMMANDS 6.20 SYNCHRONOUS V.25BIS INDICATIONS 6.21 Line procedures 6.22 Default configuration of the commands from AT to V.25bis 6.22 Default configuration of S-Registers from AT to V.25bis 6.23...
- Page 5 SNM15 Introduction INTRODUCTION OVERALL FEATURES The SNM 15 modem is externally designed with a metal frame. The cards are pulled out by pressing the lever located beneath the front panel. On the front panel there are indicating lights for the main interface circuits, the operational condition of the modem and the operation and test enabling switches.
- Page 6 SNM15 Introduction Environmental Conditions Operational temperature : from 0°C to +50°C Storage temperature from -20°C to +80°C Relative moisture from 5% to 92% non condensing Mains Power Supply Power supply voltage 220 Vac. (-15% : +10%) frequency 47 : 63 Hz.
- Page 7 SNM15 Introduction connection and the real primary function of transmitting data are performed. The latter function can be performed in either synchronous or asynchronous mode. COMMAND PORT : This port can only be used to send the commands to the modem. The...
- Page 8 SNM15 Introduction Cont. Circuit Direction Mnem. Description Conn. V.24RS 232 DTE-SNM15Abbrev. BA ————> TD Transmit data BB <———— RD Receive data CA ————> RTS Request to transmit CB <————> CTS Clear to transmit CC <———— DSR Modem ready AB <————>...
- Page 9 SNM15 Introduction Note: contacts 11, 12, 13, 14 and 16 have been left free. Transmitted data clock : in synchronous operation, the modem needs a clock for data transmission. This may be generated by the modem (internal clock) and supplied to the DTE via the interface circuit C114.
- Page 10 SNM15 Introduction Threshold of the receiver : definitely OFF with a carrier level (DCD) lower than -48 dBm; definitely ON with a level at -43 dBm. Call detector frequency from 25 Hz to 50 Hz; sensitivity 20 Veff or higher;...
- Page 11 SNM15 Introduction : ±1% compared to nominal Frequency tolerance frequencies laid down in the CCITT Q23 recommendation. : 100 ms ± 5 ms. Tone duration Control and Warning Devices The control and warning devices with which SNM 15 is equipped...
- Page 12 SNM15 Introduction Controls on the Rear Panel ON/OFF power supply switch on/off PWR C108 C107 C103 C104 C109 C142 LINE Front view of SNM 15 Rear view of SNM 15 Digicom SpA...
- Page 13 SNM15 Functional Features FUNCTIONAL FEATURES Operational Modes The environments V.25bis and AT that live together in the same SNM 15 modem allow you to operate, at different times, in one or another mode. When it is switched on, the system directly goes into the last environment in which you operated, by initializing the modem with the values previously saved in the non-volatile memory.
- Page 14 These techniques are made up of a line protocol acting as a logical means of transport with functions of supervising the transmitting device and optimizing the data transmission speed. SNM15 implements 2 error correction tecniques: MNP4 and CCITT V.42. When using the error check it is indispensable to use the flow control (see command &U);...
- Page 15 SNM15 Functional Features 3 classes of operation as well as a series of options have been defined. Classes 1 & 2 make use, on line basis, of an asynchronous protocol, whereas class 3 is supported by a HDLC type synchronous protocol.
- Page 16 SNM15 Functional Features MNP OPTION 4 This option introduces two new features in the world of error correction: Adaptive Packet The transferred packets are optimized, on the basis of the features of the transmitting device. During the transfer, the modem...
- Page 17 SNM15 Functional Features SNM 15 can operate with the following configurations: CLASS (with &E=4 or 5) 2 + 4 3 + 4 CLASS (with &E=4 or 5 and *E=1) 2 + 5 3 + 5 2 + 4 + 5...
- Page 18 SNM15 Functional Features CCITT V.42 and V.42bis V.42 and V.42bis are standard error correction and data compression tecniques stated by CCITT; V.42bis allows to have a more efficient data compression respect MNP5; infact the line efficiency can reach 400% of the nominal value.
- Page 19 SNM15 Installation INSTALLATION INTRODUCTION This part contains some indications for the preinstallation of the modem as well as the operational procedure for its correct mechanical and electrical installation. Connection to the DTE Data Terminal It is better to make sure that the data interface of the DTE to be connected to the modem complies with the CCITT V.24 or V.28...
- Page 20 SNM15 Installation RJ11 MAIN PORT COMMAND PORT RJ11 TO DTE telephon plug RJ11 SNM15 INSTALLATION OF THE SNM 15 Digicom SpA...
- Page 21 SNM15 Installation Operational Test After installing your modem, it is preferable to carry out an operational test on a local level to check out whether the modem is working all right and the telephone line is exactly matched. We suggest you carry out the test as follows: Connect the DTE to the modem on the marked connector with the MAIN PORT.
- Page 22 SNM15 Installation (300, 1200 or 2400) will be sent to the display, and LED lamp C142 will light up on the modem. The same thing can be done, by keying in the command AT&T1 from the terminal. Press the push-button TEST again to disable the loop, or key in the ESCAPE sequence (+++) from the terminal and once it is confirmed by “OK”, key in AT&T0.
- Page 23 SNM15 Use of the Modem USE OF THE MODEM INTRODUCTION Control and worning devices All the manual controls and indicating lights are located on the front panel of the modem (Fig. 1). In order to identify them, consult the mnemonic reading on the panel.
- Page 24 SNM15 Use of the Modem the ANS push-button may remain in the OUT position, since when the call comes in from the telephone line, it will be automatically set to ANSWER (see register S0). This option is available when the terminations are indifferently set to call and to answer, typically in unattended automatic systems.
- Page 25 SNM15 Use of the Modem Warning Devices (Power) green LED lamp, on indicates that that the modem has been switched on. (Data Terminal ready) red LED lamp: ON indicates C108 that the DTE is connected. (Transmitted Data) red LED lamp: ON indicates that...
- Page 26 SNM15 Use of the Modem AT COMMANDS The AT command set has become a de facto industry standard for commanding low, medium and high speed asynchronous modems. The SNM 15 modem’s extended AT command set is fully compatible with the original AT command set, but in addition, it contains command for error control, speed conversion and stored numbers for auto-dialling.
- Page 27 SNM15 Use of the Modem a. “AT” or “at” + <command body> + <CR> EXAMPLE:ATDP0331263122<CR> b. “AT&” or “at&” + <command body> + <CR> EXAMPLE: AT&F <CR> c. “AT*” or “at*” + <command body> + <CR> EXAMPLE:AT*E1 <CR> 2. “A/” or “a/”...
- Page 28 SNM15 Use of the Modem Auto-Baud and Auto-Parity Detection When in command mode, each time an AT command is entered, the SNM 15 modem will automatically analyze the prefix “AT” or “at” to detect the speed and parity of your computer or terminal.
- Page 29 SNM15 AT Command Set Description AT COMMAND SET DESCRIPTION COMMAND DESCRIPTION Attention Repeats last command Connection in Answer mode Dial command Echo Communication standard on line Connection/disconnection from the line Modem ID Loudspeaker volume Loudspeaker control Nn&Zxx Stores telephone number...
- Page 30 SNM15 AT Command Set Description &M Async/Sync mode &N Displays telephone numbers directory &R CTS options in synchronous mode &S Enables/disables front panel buttons &T Test mode &U Flow control &W Stores user configuration &X Synchronous clock source &Y Command port...
- Page 31 SNM15 AT Command Set Description ATTENTION: in the AT command state the modem can automatically detect the terminal bit rate and character format, adjusting itself accordingly, as soon as a command is issued. The following DTE rates are permitted: 300, 1200 and 2400 bps (for 4800 and 9600 bps see command *I) This command causes the modem to repeat the last AT command.
- Page 32 SNM15 AT Command Set Description Selects the modulation standard that the modem will have to adopt when it is connected to the remote modem. The choice of a modulation standard automatically disables the other options; for example with ATF4 you set the modem to operate only with the V.22 standard (1200 bps full-duplex).
- Page 33 SNM15 AT Command Set Description This command controls the volume of the modem’s internal loudspeaker. = Low loudspeaker volume = Medium loudspeaker volume = High loudspeaker volume This command controls the loudspeaker. = Loudspeaker always off = Loudspeaker on until the carrier is detected = Loudspeaker always on ATNn&Zxx...
- Page 34 SNM15 AT Command Set Description This command enables or disables any messages or answers when faced with commands supplied by the DTE. If it is disabled, the modem will accept the commands but it will not confirm them. = Messages and Answers enabled...
- Page 35 SNM15 AT Command Set Description LIST OF THE MESSAGES IN SHORT AND EXTENDED FORMS SHORT EXTENDED DESCRIPTION 0 OK command performed 1 CONNECT 300 connected to 300 bps 2 RING ring on 3 NO CARRIER carrier absent 4 ERROR illegal command...
- Page 36 SNM15 AT Command Set Description In extended form the messages are preceded and followed by control characters [RETURN] [LINEFEED]. In short form only the characters given in the table are sent followed by [RETURN]. = Compatible with Hayes 300 modem = Enables result code “CONNECT 1200”...
- Page 37 SNM15 AT Command Set Description AT&C Selects the mode for handling criteria C109 (DCD) and C107 (DSR). &C0 = C107 and C109 forced ON &C1 = C107 and C109 handling depends on the selected modulation standard. &C2 = C107 forced ON.
- Page 38 SNM15 AT Command Set Description AT&D This command selects the mode for handling criterion C108 (DTR). &D0 = DTR is ignored. &D2 = DTR is handled like C108.2; the standby condition disables the modem when it calls and answers. If the modem is switched off on-line, it will be immediately disconnected.
- Page 39 SNM15 AT Command Set Description buffer mode after 8 seconds. In this case the received characters are stored and sent to the DTE (the buffer capacity is 200 characters). &E0 = the error correction function is disabled. &E1 = error correction (MNP and LAPM) are enabled in autoreliable mode with autoreliable buffer and character.
- Page 40 SNM15 AT Command Set Description AT&I This command enables or disables the constant speed of the data interface. This command allows you to maintain a constant transmission speed between the DTE and modem and vice-versa, independently from the transmission speed on line. A buffer in the modem will take care of “parking”the data if the speed on line is...
- Page 41 SNM15 AT Command Set Description &I2 = constant speed is enabled. Upon connection, “CONNECT” will appear followed by the data interface speed. &I3 = same as &I1 with parity reconstruction AT&M This command selects synchronous or asynchronous mode of operation.
- Page 42 SNM15 AT Command Set Description AT&N This command displays the entire telephone directory. &N = Displays the telephone directory &N99 = Deletes the entire telephone directory AT&R This command controls the interaction of criteria C105 and C106 (see register S26).
- Page 43 SNM15 AT Command Set Description AT&U This command enables or disables the option for the modem or the DTE to block the data flow. It is important to set this option expecially with error correction active. The flow control can be hardware and/or software.
- Page 44 SNM15 AT Command Set Description AT&W This command stores the configuration parameters set by the user. It may be given on its own or be preceded by the commands that you intend to store, such as e.g.: ATF0X4&I1S0=0S8=3&W In this way, the given configuration is stored, as well as selecting the operational mode of the modem.
- Page 45 SNM15 AT Command Set Description OPERATION PORT PORT PORT ESCAPE V.25bis SYNC MAIN MAIN MAIN N.A. N.A. SYNC COMMAND COMMAND MAIN COMMAND N.A. ASYNC MAIN MAIN MAIN MAIN MAIN ASYNC COMMAND COMMAND MAIN COMMAND N.A. USE OF THE SNM 15 PORTS N.A.
- Page 46 SNM15 AT Command Set Description AT*D This command enables the C108.1 functionality in asynchronous mode. This feature allows the modem to dial the number stored in memory location N0 when DTR is raised; communication is asynchronous. The modem hangs up the call and returns to command mode when DTR is lowered.
- Page 47 SNM15 AT Command Set Description AT*I This command disables the auto-speed function (that allows the interface speeds to be automatically selected up to 2400 bps) and defines the operation with constant DTE side speed for the value selected (e.g. “AT*I6” the modem remains forced on the interface side to operate at 4800 bps;...
- Page 48 SNM15 AT Command Set Description pin 19 has a negative polarity (MARK) or it is not connected, the modem works regularly; the changing to a positive polarity (SPACE) is the same as &M1 command. = CCONF function is disabled = CCONF function is enabled AT*S This command displays the current setting of the S-registers.
- Page 49 SNM15 AT Command Set Description AT*X This command allows to control the clocks for synchronous operation of the modem. *X0 = The clocks are supplied upon connection. *X0 = The clocks are always present. This ESCAPE command allows you to bring the modem into command mode, by maintaining the connection with the remote modem.
- Page 50 SNM15 AT Command Set Description Dial Commands (ATD) Digit to select Selects stored telephone number Pulse dial Touch dial tone Wait for dial tone Pause Wait for 1/8 sec ATD0-9 Represents digits of the telephone number. The P modifier instructs the modem to pulse dial a telephone number. The T...
- Page 51 SNM15 AT Command Set Description ATDW Instructs the modem to wait 5 sec for a dial tone before dialling the rest of the dial string. If the dial tone is not detected the call will be aborted and the message “NO DIAL TONE” will be displayed.
- Page 52 SNM15 AT Command Set Description DEFAULT CONFIGURATION When the modem is switched on, it is preset as follows: ECHO 1 ECHO ENABLED STANDARD 0 MULTISTANDARD VOLUME 2 AVERAGE LOUDSPEAKER VOLUME LOUDSPEAKER 1 LOUDSPEAKER ON SINCE CARRIER DETECTION ANSWER 0 COMMAND...
- Page 53 SNM15 AT Command Set Description &X CLOCK 0 SUPPLIED BY THE MODEM &Y PORT POSITION 0 MAIN PORT ASYNCH. C108/1 0 DISABLED DATA COMPRESS. 1 ENABLED V.42BIS/MNP CLASS 5 DTE SPEED 0 BY AUTOBAUD CTS IN ASYNC. 1 CTS NORMAL...
- Page 54 SNM15 V.25 bis V.25 BIS INTRODUCTION SNM 15 includes the V.25bis command protocol to allow auto- dialling from Synchronous and asynchronous data terminal equipments, using series 100 interface circuits. This is an international standard which makes the modem compatible with host software already written for dial-up modems.
- Page 55 SNM15 V.25 bis Definitions and Operational Modes Before tacking the explanations for use, it is a good idea to supply some definitions regarding the V.25bis and point out how to operate it. The following fields can be distinguished in the V.25bis:...
- Page 56 SNM15 V.25 bis Telephone calls: by using the telephone book (in V.25bis mode) or sending the desired number one at a time, you can make a telephone call with the help of the appropriate commands. If, for any reason, the call were not successful (engaged number,...
- Page 57 SNM15 V.25 bis number with another one, the number that you wish to operate on must not be present in the Black List. It is possible to insert a number into the File that is already present in the Black List, for example due to an unsuccessful phone-call made with the direct dialing command.
- Page 58 SNM15 V.25 bis DIALING State: Determines the state of the telephone number in the memory. To determine it, the parameters U, D and F are used with the following meaning: Phone-call with no Restrictions (U): In this case the number may be dialed in any case you wish since it is not subject to restrictions.
- Page 59 SNM15 V.25 bis Examples: COMMAND: RLN(XX) This is sent from the DTE; XX (01-20) represents the memory area in which the number whose related parameters you wish to find out are contained (without XX, the situation of all the numbers in the memory will be displayed).
- Page 60 SNM15 V.25 bis Asynchronous V.25bis commands and indications MESSAGE CR LF The format of the characters must be the same as in the IA5 alphabet, i.e: 7 data bits and EVEN parity. It should thus be noted that the operations always take place with a 10 start-stop character format.
- Page 61 SNM15 V.25 bis ASYNCHRONOUS V.25BIS COMMANDS COMMAND FORMAT DESCRIPTION CRNXX..XX REQUEST FOR CALL WITH TELEPHONE NUMBER SUPPLIED BY DTE. It is sent from the DTE to start up the procedure. The command is always accompanied by the number to be dialed.
- Page 62 SNM15 V.25 bis determined by the first two figures of the parameter, separated by the number to be stored with the symbol “;”. RLNXX REQUEST FOR THE LIST OF NUMBER IN MEMORY. This command allows the DCE to list the numbers contained in the memory together with their state.
- Page 63 SNM15 V.25 bis priority even if the DCE is set for auto-answer. The DCE must receive the DIC command within a time limit of 5 sec. since the display of INC. Any incoming calls will be ignored for a minute since the reception of DIC.
- Page 64 SNM15 V.25 bis REDIALING OF THE LAST NUMBER This command allows the DCE to redial the last number you called The command is linked to the last time the DTE sent a CRN. ECHO ON Faced with this command, the DTE will echo each command that it receives from the DTE.
- Page 65 SNM15 V.25 bis Separators In comparison to what was given in table 4/V.25bis of the CCITT the following meaning has been allocated to the separators: - Separator No.2 (<) : 2 second pause indication. - Separator No.3 (=) : 5 second pause indication.
- Page 66 SNM15 V.25 bis ASINCHRONOUS V.25BIS INDICATIONS INDICAT. FORMAT DESCRIPTION END OF LIST This indication allows the DCE to inform the DTE that it has completed the list of the requested indications. ON LINE INDICATION This indication allows the DCE to...
- Page 67 SNM15 V.25 bis VALID COMMAND. The DCE informs the DTE that is able to acknowledge the programmed command it has received as valid. INCOMING CALL. The DCE informs the DTE of the presence of an incoming call signal on line.
- Page 68 SNM15 V.25 bis CFIXX CALL FAILURE This is an indication sent by the DCE in reply to a CRN, DLN or CRS of the DTE; it must be accompanied by a two letter parameter that determines the cause of it.
- Page 69 SNM15 V.25 bis PERFORMED DIALING RT: The call is interrupted due to a 40+5 sec. time-out on the detection of a ring tone (call control tone). NT: The call is hung up since there is no answer tone from the remote DCE (test on 60 + 5 sec.).
- Page 70 SNM15 V.25 bis COMMAND CHECK INDICATION CONSEQUENCE Any one Command not performed CRN(YY..Y) ONL (1) Call accepted CRS(XX) ONL (1) Call accepted ONL (1) Call accepted CRN(YY..Y) DLCX The call cannot be accepted for an X period. CRS(XX) DLCX The call cannot be accepted for an X period.
- Page 71 SNM15 V.25 bis LSDXX;Y.Y; As indicated above but limited ZPST only to delayed numbers. CLAXX Cancellation of the number in the XX memory area. The DCE will echo each command that it gets from the DTE. The DCE will not echo any command that it from the DTE.
- Page 72 SNM15 V.25 bis Synchronous V.25bis commands and indications In synchronous V.25bis, in order to send commands to the modem, the frame structure must follow V.25bis reccomandation concerning the use of a bit oriented protocol (HDLC) The frame structure is as following:...
- Page 73 SNM15 V.25 bis Example The modem has to call this number: 0331-263122; sequence will be the following: 7E FF 13B CRN0331<263122 FCS 7E Note: for convenience, the content of message field is displayed in text and not in hexadecimal form as the remaining sequence (except the not specified FCS field).
- Page 74 SNM15 V.25 bis PRN;YY..YY TELEPHONE NUMBER PROGRAMMING. It is the command that sets the DCE into a programming state. It allows the user to put a maximum of 20 number with 20 figures each into the memory. Their position is...
- Page 75 SNM15 V.25 bis LINE PROCEDURES For everything concerning the exchange tones and related levels, consult the CCITT E180, E181, E182 recommendations, whereas you need to consult what is outlined in brochure 11.2 supplement N° 2 of the CCITT for the modulation of the tones.
- Page 76 SNM15 V.25 bis &U FLOW CONTROL 5 FLOW CONTROL RTS/CTS AND XON/XOFF &X CLOCK 0 SUPPLIED BY THE MODEM &Y PORT POSITION 0 MAIN PORT *D C108.1 IN ASYNC. 0 DISABLED DATA COMPRESS. 1 ENABLES - CLASS 5 MNP *H CTS IN ASYNC.
- Page 77 SNM15 V.25 bis REG. RANGE UNIT DECIM. DESCRIPTION V.25bis NUM. DEF. (Default) 0-255 RING 00 Rings awaited for connection 0-255 RING 00 Detected rings counter 0-127 ASCII 43 Escape character 0-127 ASCII 13 Return CR (F) 0-127 ASCII 10 Line feed...
- Page 78 SNM15 Diagnostic DIAGNOSTICS INTRODUCTION The modem is supplied with circuits for diagnostics in compliance with CCITT recommendations. They can be used to carry out a complete test of all the elements making up the network. The command used to enable the loops from DTE is &Tn; the list below describes the function of this command and are only valid in HAYES mode.
- Page 79 SNM15 Diagnostic The local modem, the telephone line and the line circuits of the modem will be checked in this way. Disabling Remote Loop 2 To bring the test to an end, key in the ESCAPE sequence and then AT&T0; key in ATO to put it back on line with the remote modem or else press the TEST push-button on the front of the modem.
- Page 80 SNM15 Diagnostic simply keying in the characters and making sure that the modem restores them correctly. A more effective test can be carried out with an analysis instrument such as a data tester or a data analyzer. Disabling Loop 3 To remove the loop, you need to key in the ESCAPE sequence and when the modem answers with “OK”...
- Page 81 SNM15 Use of the S-Register USE OF THE S-REGISTERS INTRODUCTION The SNM 15 modem is equipped with some registers to store the value of the control characters on, timers and counters then used in operation. The registers can be identified as internal (used by the modem) registers that can be modified by the operator.
- Page 82 SNM15 Use of the S-Register S0 Auto answer feature Enables and disables the auto-answer device. S0=0 The auto-answer feature is disabled. S0=n (where n>0) the auto-answer feature is enabled before carrying out the connection. S1 Ring counter Detecteds RING counter.
- Page 83 SNM15 Use of the S-Register S6 Waiting time for dialling tone This register determines the time the modem needs to wait to detect the dialing tone supplied by the telephone exchange (if the detection has been enabled by the command X).
- Page 84 SNM15 Use of the S-Register value of parameter F must compulsorily be different from 0 (zero). The value is determined in tenths of a second. S10 Disconnection Time for Carrier Absence This register determines the time interval between the loss of carrier and the disconnection of the modem.
- Page 85 SNM15 Use of the S-Register S26 RTS/CTS Delay This sets the delay time for the operational transition of the CTS in relation to the RTS. The value is in hundredths of a second. 29, S30, S31, S32, S33 Internal registers.
- Page 86 SNM15 Use of the S-Register Default configuration of the register REG. RANGE UNIT DECIM. DESCRIPTION ° DEF. 0-255 RING 00 Rings awaited for connection 0-255 RING 00 Detected rings counter 0-127 ASCII 43 Escape character 0-127 ASCII 13 Return 0-127 ASCII...
- Page 87 SNM15 Typical Applications TYPICAL APPLICATIONS INTRODUCTION A few examples of how to use the modem are given in this section of the manual. The programs given are related to general applications and start from the default programming of the modem.
- Page 88 SNM15 Typical Applications CONNECTION IN V.22 AND MNP The programming for the connection of the two modems, by enabling the error corrector, is given below. Remember that the auto-answer function is by default disabled in the modem. The programming commands are:...
- Page 89 SNM15 Typical Applications Call from the Command Port Should you only have one personal computer available and you wish to first enable the terminal emulation program and then the synchronous emulation, you need to use register S25 (delay to disconnect).
- Page 90 SNM15 Typical Applications Call from the Main Port Repeat the operations described above, without sending the command to enable the COMMAND PORT. Remember that the ESCAPE FUNCTION is no longer available with this configuration. The commands will thus become: ATS25=30 AT&M1...
- Page 91 SNM15 Dip-Switches setting DIP-SWITCHES SETTING A table summarizing the functions played by each single dip- switch is given below: Level TX - 1 dBm - 2 dBm - 3 dBm - 4 dBm - 5 dBm - 6 dBm - 7 dBm...
- Page 92 SNM15 Dip-Switches setting Dip-switch Position Description Reserved for future use Reserved for future use Reserved for future use Reserved for future use Reserved for future use Reserved for future use OFF interface speed as autobaud ON interface speed 9600 bps...
- Page 93 SNM15 Dip-Switches setting Topographical view of SNM 15 Digicom SpA...
- Page 94 SNM15 Dip-Switches setting TERMINAL EMULATION PROGRAM A program that allows you to obtain a terminal emulation, by using the Basic interpreter present in the DOS operating system, is given below. To enable it you only need to key in GWBASIC under DOS, for Olivetti systems, while in IBM systems you will need to key in BASIC or BASICA, depending on the system.
- Page 95 SNM15 Dip-Switches setting 210 REM 4) Character length. E.g: 7, 8 bits 220 REM 5) Number of stop bits. E.g: 1, 1.5, 2 230 REM 1 2 3 4 5 240 OPEN “com2:1200,e,7,1,rs,cs,ds,cd” AS #1 260 IF EOF(1) THEN 270 ELSE GOSUB 340 270 A$=INKEY$: IF A$=””...