Black Box MWU2000-G703 User Manual
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Black Box MWU2000-G703 User Manual

Black Box MWU2000-G703 User Manual

2.048mbps wireless modem: g703: mwu2000-g703 x.21: mwu2000-x21 v.35: mwu2000-v35 directional antennas with 10 m of cable: 12dbi transmit/ 12dbi receive: mwu2000-1212 12dbi transmit/ 18dbi receive: mwu2000-1218 12dbi transmit/ 24dbi receive:
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2.048Mbps Wireless Modem
TECHNICAL:
(0118) 965 6000
SALES:
(0118) 965 5100
FAX:
(0118) 965 5001
ADDRESS:
464 Basingstoke Road, Reading, Berkshire RG2 0QN
WEB:
www.blackbox.co.uk
2.048Mbps Wireless Modem:
G703:
X.21:
V.35:
Directional Antennas with 10 m of cable:
12dBi Transmit/ 12dBi Receive:
12dBi Transmit/ 18dBi Receive:
12dBi Transmit/ 24dBi Receive:
MWU2000-G703
MWU2000-X21
MWU2000-V35
MWU2000-1212
MWU2000-1218
MWU2000-1224

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  • Page 1 (0118) 965 5100 FAX: (0118) 965 5001 ADDRESS: 464 Basingstoke Road, Reading, Berkshire RG2 0QN WEB: www.blackbox.co.uk 2.048Mbps Wireless Modem: G703: MWU2000-G703 X.21: MWU2000-X21 V.35: MWU2000-V35 Directional Antennas with 10 m of cable: 12dBi Transmit/ 12dBi Receive: MWU2000-1212 12dBi Transmit/ 18dBi Receive:...
  • Page 2 Web Site: www.blackbox.nl/ Belgium: Black Box Tel: 027258550 Fax: 027259212 Web Site: www.blackbox.be SALES: 0118 965 5100 How To Contact your Local Black Box Australia: Black Box Catalog Australia PTY LTD Tel: 0398797100 Fax: 0398702955 Brazil: Black Box Do Brasil.
  • Page 3 France: Black Box Catalogue Tel: 0145606700 Fax: 0145606747 Web Site: www.blackbox.fr Spain: Black Box Comunicaciones S.A. Tel: 34 91 663 0200 Fax: 34 91 661 84 35 Web Site: www.blackbox.es 2.048Mbps Wireless Modem U.S.A Black Box Corporation Tel: 724-746-5500 Fax: 724-746-0746 Web Site: www.blackbox.com...

  • Page 4: Table Of Contents

    2.048Mbps Wireless Modem Introduction ...8 About this Manual ...8 Product Description...9 Main Features of the 2.048Mbps Wireless Modem...10 Wireless Connectivity...10 Seamless Communication ...10 Versatility ...10 Error-Free Data Transfer ...10 High Speed Communication ...10 RSSI…...11 Co-location...11 Choice of Antennas, Cables and RF Accessories...11 2.048Mbps Wireless Modem Benefits...11...
  • Page 5 To access the Parameters Menu: ...46 To make selections using the Parameters menu: ...46 LIU Parameters Menu...47 MCP Parameters Menu ...60 Radio and Modem Parameters Menu ...64 REMOTE Parameters ...65 Load Default Values Menu...67 Parameter Info. Screen...68 Counters and Tracers Menu ...69 System Counters ...70...
  • Page 6 DCE/DTE Configuration...108 V.35/RS-530/X.21 Standards...108 Configuration Options ...108 2.048Mbps Wireless Modem Standard Configuration...109 Connecting your 2.048Mbps Wireless Modem to another modem...110 RS-530/V.35/X.21 Back-to-Back Configuration...110 Setting the Jumper Configuration for the LIU-V.35 and LIU RS-530/X.21 Boards ...110 DCE Options...111 DTE Options ...112 Setting the DCE/DTE Mode Parameter ...112...
  • Page 7 Appendix E – Pin Assignments ...130 E1/T1 and Fractional E1/T1 Pin Connections ...130 LIU RS-530 Connector Pin Assignments ...130 LIU D-25 to V.35 Cable Pin Assignments ...131 LIU D-25 to X.21 Cable Pin Assignments ...132 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233...

  • Page 8: Introduction

    Appendix D. Installing Other Types of Receive Amplifiers provides tips on installation of different types of receive amplifiers, which are supported by the 2.048Mbps Wireless Modem but are not supplied by Black Box. Note: This manual describes 2.048Mbps Wireless Modems with hardware version 2 that are running software version 1.7.

  • Page 9: Product Description

    Modem permits robust and reliable wireless communication between remote sites where a physical wired connection would be impossible, impractical or too expensive. The 2.048Mbps Wireless Modem/2048 supports data Transfer at speeds of up to 2.048 Mbps. A DSP modem with adaptive equalization provides a dependable communication link even in bad line-of-sight conditions.

  • Page 10: Main Features Of The 2.048Mbps Wireless Modem

    Versatility The 2.048Mbps Wireless Modem can transfer any kind of data, voice or video transmissions and can be operated together with most types of bridges, routers and multiplexers. The system supports the E1/T1 communication standards and with the appropriate Line Interface Unit, is compatible with any other communication link standards and operates transparently to data protocols.

  • Page 11: Rssi

    Antenna reception can be fine-tuned by checking the strength of the received signal. To check signal strength, connect a Digital Voltmeter (DVM) to the Receive Signal Strength Indicator (RSSI) test point on the rear panel of the2.048Mbps Wireless Modem. Co-location This option enables to simultaneously establish a number of co-located links in star or parallel topology, when they are synchronized in frequency via a synchronizing cable.

  • Page 12: Line Interface Unit

    2.048Mbps Wireless Modem Line Interface Unit The Line Interface Unit connects the 2.048Mbps Wireless Modem to the WAN or to the DTE (Data terminal Equipment). Any data, voice or video system can be connected to the 2.048Mbps Wireless Modem using standard interfaces:...
  • Page 13 Separate DSP Transmit and Receive Modems The physical layer connection is established by two DSP (Digital Signal Processing) modems. Each modem is dedicated to one direction of the link; transmit or receive. Adaptive Equalization The time dispersion of the transmitted signal caused by multipath propagation causes inter- symbol interference (ISI).

  • Page 14: Radio

    2.048Mbps Wireless Modem ARQ – Based Error Correction The 2.048Mbps Wireless Modem uses an Automatic Retransmission Queuing (ARQ) mechanism to detect errors in received data and to request retransmission. The use of ARQ results in a significant improvement in performance, overcoming problems caused by interfering signals.

  • Page 15: Front Panel Indicators

    If self-test fails repeatedly, contact Black Box technical support. The TEST LED will blink upon identification of any alarm condition. Refer to pages 77-82 for more information on alarm conditions.

  • Page 16: Radio

    (Alarm Indication Signal - E1/T1 and Fractional E1/T1 only). Red LED lights when WAN or DTE control frame is received by the modem indicating that information that should be sent by the modem is not received by the DTE (or the WAN). The main reason for alarm indication signal is a physical cable problem.

  • Page 17: 2.048Mbps Wireless Modem Connectors

    2.048Mbps Wireless Modem 2.048Mbps Wireless Modem Connectors Figure 1-8 shows how to connect the 2.048Mbps Wireless Modem to its antennas, the power supply and to external equipment. Figure 1-8. 2.048Mbps Wireless Modem Connections (E1 or Fractional E1 LIU) TECHNICAL: 0118 931 2233...

  • Page 18: Installation Antennas And Accessories

    General The following steps provide a guide to the correct installation and configuration of the unit: 1. The 2.048Mbps Wireless Modem should be located indoors and positioned as close as possible to the antennas. 2. Connect the unit to the end equipment. If the data interface on the DTE is either V.35 or X.21, a cable adapter should be used as follows:...

  • Page 19: To Configure The Unit As Master

    Slave mode. Units are shipped from factory with a default setting of Slave. In an E1 or T1 configuration, the Master modem must be located on the same side as the E1 or T1 master (of the external equipment that provides the system clock).

  • Page 20: To Configure Channels - Fractional E1

    2.048Mbps Wireless Modem 4. From the V.35/RS-530/X.21 Parameters menu, type 1. The Clock Rate sub-menu opens. 5. Select the required clock rate according the required data rate of n x 64kb/S. For example: Type 1 for 64 Kbps Type 8 for 512 Kbps (8 x 64) Type 32 for 2048 Kbps (32 x 64) Model BL512 allows data rates up to 512 Kbps only.

  • Page 21: To Configure Channels With Echo Cancellation- Fractional T1

    2.048Mbps Wireless Modem 4. From the Add/Remove Echo Cancellation on voice channels menu, type 2 to select the Clear (Remove) Channels menu. 5. View the current list of channel with echo cancellation. If channels in which echo cancellation should not be used are included, enter the numbers of the channels that should be removed from the list.

  • Page 22: Antennas, Cables And Accessories

    2.048Mbps Wireless Modem 4. From the Add/Remove Echo Cancellation on voice channels menu, type 2 to select the Clear (Remove) Channels menu. 5. View the current list of channel with echo cancellation. If channels in which echo cancellation should not be used are included, enter the numbers of the channels that should be removed from the list.
  • Page 23 2.048Mbps Wireless Modem Figure 2-2. Basic 8.5 dBi Antenna Showing Installation screws. Medium Gain 12dBi Antenna (Uni-12) This medium gain antenna has a relatively wide beam width (22 degrees). It is intended for both indoor and outdoor installations with medium distances between sites. UNI-12 Antenna dimensions are: 15 x 15 x 38 cm.
  • Page 24 2.048Mbps Wireless Modem Figure 2-3. Medium Gain 12dBi Antenna Medium Gain 18dBi Antenna (Uni-18) This medium gain antenna has a medium beamwidth (14 degrees) which increases the sensitivity to inaccurate alignment, but decreases the influence of multipath propagation (fading). It is intended for outdoor installations over medium to long distances. It is probably the best choice for most medium to long range applications.
  • Page 25 2.048Mbps Wireless Modem Figure 2-4. Medium Gain 18dBi Antenna High Gain Antenna (Uni-24) The gain of this antenna is 24dBi. It has a narrow beam width (7.5 degrees) which increases the sensitivity to alignment inaccuracy but decreases the influence of multipath propagation (fading).
  • Page 26 2.048Mbps Wireless Modem Figure 2-5. High Gain 24dBi antenna. Table 2-1 provides a summary of the main characteristics of the basic, medium and high gain antennas: SALES: 0118 965 5100...

  • Page 27: Rf Accessories

    -10dBm to 0dBm. The TPA 24 LH receives an input power of 0dBm to +10dBm. Both models then amplify the input power to a fixed output level of 24dBm (250mW). The TPA 24 gets its DC power supply from the modem transmitter through the RF cable.
  • Page 28 1. Install the TPA 24 as close as possible to the transmitting antenna. Figure 2-6. TPA 24 Connections Diagram 2. Set the transmitter DC power supply of the 2.048Mbps Wireless Modem to 12V using the internal jumpers according to Figure 2-15: Figure 2-7.
  • Page 29 2.048Mbps Wireless Modem Note: Installations exceeding regulations set by local authorities expose the installer and the user to potential legal and financial liabilities. LNA-10 Low Noise Receive Amplifier The LNA-10 is a high-performance, low-noise preamplifier designed to enhance fringe area reception and to provide additional gain on the receive antenna, especially when using long cable runs.
  • Page 30 2.048Mbps Wireless Modem NF2 = Noise Figure of the cable = Loss of cable NF3 = Noise Figure of the modem = 2.8 G1 = Gain of LNA 10 = 10 G2 = Gain of the cable = 1/Loss of cable (*) All values above are taken in absolute value (not dB).
  • Page 31 2.048Mbps Wireless Modem Figure 2-9. LNA-10 Cable Connection Diagram The power supply (PS) and Power Inserter are supplied with the LNA-10. The RG-59 coaxial cable (with F-type connector) is not supplied and must be purchased separately. Note: See Appendix C for installing other types of receive amplifiers...

  • Page 32: Cable Types

    This cable is thicker, heavier and more expensive. However, its attenuation is very low. Impedance is 5 W. Outer diameter is 12.5mm (0.5"). The following table provides details on the attenuation of standard cables available from Black Box. Table 2-3. Attenuation of Standard Cables...

  • Page 33: Antenna Sets

    Failure to do so may void the Product Warranty and will certainly expose the end user to legal and financial liabilities. Black Box are not liable for injury, damage or violation of government regulations associated with the installation of antennas.
  • Page 34 2.048Mbps Wireless Modem Figure 2-12. Wall Mount with Azimuth and Elevation Alignment Figure 2-13 One 12dBi Antenna SALES: 0118 965 5100...

  • Page 35: Range Tables

    Modem Master and Slave units). The tables are based on the assumption that the default modem rate is being used. If a modem rate higher than the default rate is being used, the achievable range should be estimated according to the actual modem rate.

  • Page 36: Antenna Alignment

    Step 2 –Activating the front panel LEDs Two pairs of LEDs on the 2.048Mbps Wireless Modem front panel are lit when the units are synchronized. When the Radio LEDs are both lit it is an indication that the radio link is synchronized, and when the Line RXD and TXD LEDs are lit it is an indication that the line to the DTE is synchronized.

  • Page 37: Step 3 - Fine Tuning The Adjustment Of The Antenna Using Rssi Measurement

    RF channels in use. The modem also enables to collect a measurement of the average RSSI using a DVM (digital voltmeter) connected to the RSSI test pin in the rear panel of the unit.
  • Page 38 1. Set a Bias-T connection before the Receive Antenna. Figure 2-16. A Bias-T connection for RSSI measurement near the Receive Antenna 2. Set the jumpers in the Receive module of the 2.048Mbps Wireless Modem to the RSSI position. SALES: 0118 965 5100...
  • Page 39 Jumpers in the Receive module back to the default position (NC), otherwise the modem will not function. In addition, damage might be caused to the modem if the Receive Antenna is connected directly to the Receive cable, and the jumpers are not in the default position...

  • Page 40: Synchronizing Co-Located Modem Units

    Figure 2-18. Default position (NC) of the Jumpers in the Receive Module. Synchronizing Co-located Modem Units When two or more 2.048Mbps Wireless Modem units are co-located, you should perform the following procedures in order to allow optimal performance. These procedures enable synchronization of the hopping sequences used by the links, and ensure sufficient separation between frequencies used by the links at any given time.

  • Page 41: Step-1: Installing The Antennas

    Note: On the Master side, the 2.048Mbps Wireless Modem units with a SW version 1.6 and up and HW version 2 must be used. On the Slave side, 2.048Mbps Wireless Modem units with a SW version 1.6 and up can be used with either HW version 2 or previous HW version.
  • Page 42 2.048Mbps Wireless Modem Set “Number of links to synchronize” to a value greater or equal to the actual number of connected links. This setting is not necessary for the “Slave” units. Note: Selecting the option “Synchronize as many links as possible” may result in less than optimal performance.

  • Page 43: Step-3 Connecting The Master Units

    Figure 2-21. Connecting Units for Synchronization Use a standard FCC 68 4-pin plug (male) to FCC 68 4-pin plug (male) telephone cable with two twisted pairs (supplied by Black Box) to interconnect the Master units that should be synchronized. Figure 2-22. Synchronization Cable...

  • Page 44: Set-Up And Configuration

    Parity None Flow control None Connector Available Com port Connect the terminal to the monitor interface of the 2.048Mbps Wireless Modem. The monitor appears displaying the main menu. Main Menu When the Setup and Configuration screen appears the main menu is displayed, providing...

  • Page 45: Parameters Menu

    LIU parameters – setting Line Interface Unit Parameters MCP parameters – setting Management and Control Parameters Radio and Modem Parameters – setting Radio and Modem Parameters REMOTE parameters –viewing and/or setting parameters of the remote unit Load Default Values –loading the factory default values Parameters Info.

  • Page 46: System Reset

    Resetting the system from the System Reset menu implements all the changes made to the parameters of all the Setup and Configuration functions. Testing This menu is for authorized Black Box technical staff only. Parameters Menu You can access most of the items for configuring your 2.048Mbps Wireless Modem from the...

  • Page 47: Liu Parameters Menu

    V.35/RS-530/X.21 Parameters Menu. (Select if a V.35/RS-530/X.21 LIUis used). Loopback Mode. Line Interface Unit type (set at factory and should not be changed unless LIU changes). E1 Parameters Menu Table 3-1. E1 Parameters Menu Items and Actions 2.048Mbps Wireless Modem appears). TECHNICAL: 0118 931 2233...
  • Page 48 2.048Mbps Wireless Modem E1 Alarm Buffer The Possible alarms are: LOS (all zeros signal): Loss Of Signal – No signal is received from the data equipment. AIS: Alarm Indication Signal – No signal is received by the connected end equipment.
  • Page 49 Unframed all ones: The transmitted signal comprises a continuous sequence of ones without any ramming or other signalling messages The Remote alarm method should be set in accordance with the configuration of the end equipment. 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233...
  • Page 50 This parameter determines the sensitivity of the receiver circuits in the line interface to the end equipment. If the distance between modem and the end equipment is up to 500 meters, it should be set to 0 (short haul). If the distance is more than 500 meters, it should be set to 1 (long haul) to compensate for losses by increasing the sensitivity of the receiver circuits by approximately 30 dB.
  • Page 51 Too many BPV/CV Too many Bipolar code violations, indicates selection of Bipolar AMI line code in the modem when the end equipment uses HDB3 line code. When an alarm is detected a note appears at the bottom of the display: (Note:An alarm has been activated), and the message ALARM EXISTS is displayed on the menu header (see Figure 3-1).
  • Page 52 2.048Mbps Wireless Modem When an alarm is detected, a note appears at the bottom of the display (Note: An alarm has been activated) and the message: ALARM EXISTS is displayed on the menu header (see Figure 3-1). In addition, the TEST LED will blink.
  • Page 53 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233...
  • Page 54 2.048Mbps Wireless Modem SALES: 0118 965 5100...
  • Page 55 T1). The selection should be made according to the length of the line connecting the terminal equipment to the 2.048Mbps Wireless Modem, and according to the type of application (CSU or DSU network interface). The selection affects the pulse mask used in the 2.048Mbps Wireless Modem...
  • Page 56 2.048Mbps Wireless Modem interface, as per the requirement specified in the applicable standard (DSX-1 for DSU network interface, ANSI T1.403 for CSU network interface). See Appendix C for more details about CSU and DSU network interfaces. CRC6 Usage The F-bits in an ESF multiframe (see Superframe method above) provide Cyclic Redundancy Check 6 (CRC6) information.
  • Page 57 Yellow-alarm: Indication from the connected end equipment that it does not succeed to synchronize with the modem. Frame-slip: Indicates lack of compatibility between the clocks of the modem and the end equipment. Remote-BreezeLINK-Unsync: Indicates a temporary incidence of a very noisy radio channel.
  • Page 58 2.048Mbps Wireless Modem V.35/RS530/X.21 Parameter Menu Table 3-5. V.35/RS-530/X.21 Parameters Menu Items and Actions DCE/DTE The current selection is displayed (or a “NOT DEFINED message, if a different LIU is used). Table 3-6 displays DCE/DTE functionality options: Table 3-6. DCE/DTE Functionality Options...
  • Page 59 Wireless Modem or in the end equipment itself. When the end equipment supports local loopback testing, this helps to identify whether the source of the problem is in the end equipment or in the connection.

  • Page 60: Mcp Parameters Menu

    For fractional E1/T1, the LIU card performs the loopback. Both clock and data are looped back. When the Master modem is set for loopback operation, the clock starts drifting from the clock of the end equipment (under normal conditions, the system clock is supplied by the Master end equipment).
  • Page 61 Total Link Delay In order to improve performance the 2.048Mbps Wireless Modem uses an Automatic Retransmission Queuing (ARQ) mechanism that enables to detect errors in the received data and to request retransmission of that data. The ARQ mechanism breaks the data into fragments (called buffers) and adds a Cyclical Redundancy Check (CRC) code, which enables detection of errors in the received fragment.
  • Page 62 Some data communications protocols are sensitive to delay. Select the appropriate delay while taking into consideration the relevant performance. The actual value of the link delay is dependent on the modem rate and data rate configuration, and is displayed when setting the total link delay.
  • Page 63 The maximum length of the string is 50 characters. For example: if you wish to add to the above example a command that will cause the dial-up modem to dial the phone number 1234567 using DTMF tone dialling after every reset of the modem, use the following string: AT&f\nATS0=1\nAT&K0\nATS23=3B\nATQ1\nATDT 1234567\n...

  • Page 64: Radio And Modem Parameters Menu

    Table 3-10. Radio and Modem Parameters Menu Options Modem Rate The modem rate is set automatically according to the selected LIU Data Rate (Clock Rate), according to the following table: Table 3-11. Default Modem Rate According to Selected LIU Data Rat...

  • Page 65: Remote Parameters

    Test Sequence is used as the Hopping Standard. Test Sequence should only be used as the Hopping Standard by authorized Black Box technicians. Any changes to the Test Sequence channels shall have no effect when regular Hopping Standards are being used.
  • Page 66 2.048Mbps Wireless Modem Copy local database and download to remote unit. Table 3-12. REMOTE Parameters Menu Options Switch to Remote Monitor When selecting option 1 (Switch to remote monitor) in the REMOTE Parameters Menu, the database of the remote unit starts loading into the local unit. This process takes some time, and the time required is even longer if the quality of the link is poor.

  • Page 67: Load Default Values Menu

    1 – Do not copy database and download to remote unit yet. Reset the remote unit for the changes to take effect. Load Default Values Menu The Load Default Values menu gives you access to the following options: Cancel Operation Load Values 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233...

  • Page 68: Parameter Info. Screen

    2.048Mbps Wireless Modem Table 3-13. Load Default Values Menu options Note: The Hopping Standard and LIU type parameters are fixed and are not affected by this operation. Parameter Info. Screen Option 6 in the Parameters menu opens the Info Screen, which presents information on the current status of main parameters of either the local or the remote unit (depending on local/remote monitoring status).

  • Page 69: Counters And Tracers Menu

    Type 6 to display maximum number of consecutive traced errors versus time. Type 7 to set the Time Tracer resolution. Type 8 to display the Reset Counter. Type 9 to clear the Reset Counter. Type A to display Alarms. 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233...

  • Page 70: System Counters

    (LIU side) and with the other end of the wireless link (Radio side). The data stream received/transmitted from/to the 2.048Mbps Wireless Modems is divided internally in the 2.048Mbps Wireless Modem into buffers, and the statistics are based on these buffers. The data is accumulated continuously until the System Counters are cleared.
  • Page 71 Note: Buffer Error Rate is different from Bit Error Rate. Each buffer contains between 40 to 300 bytes, depending on modem rate. A buffer with errors means errors in between 1 to all bits in the buffer. Thus, the Bit Error Rate may be any number between the Buffer Error Rate and the Buffer Error Rate divided by number of bits in the buffer (number of bytes times 8).

  • Page 72: Channel Tracer Rssi Per Channel

    The “Error correction algorithm” graph indicates the expected Bit Error Rate after error correction of the Wireless Modem versus RADIO BUFFERS ERROR RATE. See the description of the Error correction algorithm in the Technical Specification. Channel Tracer RSSI per channel In the Counters and Tracers menu, type 2 to view the Channel Tracer RSSI per channel graph.

  • Page 73: Channel Tracer Errors Per Channel

    The RSSI per channel test displays in graphic format the strength of the received signal on each of the RF channels used by the 2.048Mbps Wireless Modem. Each vertical column represents the level of the received RF signal on one of the channels. Available channels are from 0 to 100 (0 representing 2.400GHZ and 100 representing 2.500GHz), depending on...

  • Page 74: Clear System Counters And Channel Tracer

    2.048Mbps Wireless Modem Each column represents the percent of RADIO ERROR BUFFERS in each of the RF channels, out of all the buffers that were transmitted on the channel. A “–” sign at the bottom represents a channel that is not included in the set of hopping frequencies. On top of the graph, information is provided on the channel with the highest error rate (Max errors in percentage and the number of the channel with the maximum error rate).

  • Page 75: Set Time Tracer Resolution

    2.048Mbps Wireless Modem Figure 3-12. Time Tracer Max Consecutive Errors Graph Using the same time resolution as the Time Tracer Errors versus Time, this graph displays the maximum number of consecutive errors in each time unit. At the top of the graph appears...

  • Page 76: Reset Counters

    Unexpected Loss of CPU clock Unexpected software reset Unexpected assertion of SW reset line All the “Unexpected” causes indicate HW problems that must be checked by Black Box engineer Clear Reset Counter In the Counters and Tracers menu, type 9 to clear the Reset Counter.

  • Page 77: Watch Alarms

    Description: Appears in V.35/RS-530/X.21 units that are configured as DCE EXTERNAL CLOCK or as DTE; indicates that the end equipment does not supply a clock to the LIU. Configure the end equipment to supply the clock, and connect it to the Correction: modem.. 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233...
  • Page 78 (e.g. clocks with excessive jitter) or a problem related to configuration of clocks. Correction: Check the quality of the radio link. If the quality is low, try to improve it. Otherwise, the unit should be checked by an authorized Black Box technician Message: Too many BPV/CV Description: In Fractional E1 applications, too many Bipolar code violations-indicates selection of bipolar AMI line code in the 2.048Mbps Wireless Modem when...
  • Page 79 WARNING: Modem rate too low for RADIO BUFFER ERROR RATE (based on counters) Description: The difference between the modem rate and the LIU rate is too small to allow the ARQ error correction protocol to correct all the errors. Increase the modem rate, decrease the LIU rate or improve the error rate on Correction: the radio by improving the quality of the RF link.
  • Page 80 2.048Mbps Wireless Modem Message: WARNING: Delay setting may be too short to correct all errors Description: The selected delay setting might be too short to allow the ARQ to correct the bursts of radio errors present. Correction: Increase the delay setting or identify and eliminate the cause of the bursts by using the tracers.
  • Page 81 E1/T1 Parameters setting: in a E1/T1 application. Correction: Configure the parameters properly. Note: HOP Standard setting can only be configured by an authorized Black Box technician. 2.048Mbps Wireless Modem parameters: in a fractional E1/T1 application, different parameters used in the two units...

  • Page 82: Mode And Access Control Menu

    During the Site Survey test, the 2.048Mbps Wireless Modem does not transmit, and a link cannot be established. Only one unit is required for Site Survey. The Site Survey graph presents the history of the received signal’s strength on each of the frequency channels (only...

  • Page 83: System Reset Menu

    Note: Reset the system if you made any changes in the local and/or remote unit parameters. Verify the proper setting for re-establishing the link after thenew parameters take effect. Figure 3-14. Site Survey Graph ⇒ To access the System Reset TECHNICAL: 0118 931 2233 2.048Mbps Wireless Modem...

  • Page 84: Problem 1: Two Units Are Connected Together But There Is No Radio Link Between Them

    2.048Mbps Wireless Modem Introduction In the process of establishing a link, various problems may arise, either single link problems or co-located link problems. The possible problems are: Two units are connected but there is no radio link between them Poor performance of a radio link...

  • Page 85: Problem 2: Poor Performance Of Radio Link

    Verify that the One Antenna Standard (Diplexer) is the selected hopping sequence. If you use the Transmit Power Amplifier (TPA-24): Check the 12 VDC power supply jumpers on the Modem transmitter. Check the power level of the Transmit Power Amplifier(TPA-24).

  • Page 86: Problem 3 There Is A Radio Link But Lui Does Not Operate, Or Is Not Synchronised

    2.048Mbps Wireless Modem The received power should be above the reception threshold for the modem rate in use. It is preferable to keep the received power level at least 10 dB above the threshold for an adequate fade margin. If the received power level is not sufficient, check RF installation and increase the antenna gain, use cables with lower loss or add a Transmit Power Amplifier or an LNA.

  • Page 87: Synchronize

    Probable cause: Problem with the cable connecting the unit and the end equipment. ⇒ To check the cable connecting the unit and the end equipment: 1. From the Parameters menu, select Parameters Info. Screen. 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233...

  • Page 88: Problem 5: The Radio Link Is Stable, But The Error Rate On The End Equipment Is Unacceptable

    1. From the Counters and Tracers menu, select Watch Alarms. 2. If the “Modem rate too low for RADIO BUFFER ERROR RATE” alarm appears, this indicates that the difference between the LIU clock rate and the modem rate is too low to correct all radio errors.

  • Page 89: Problem 6: The Radio Link Is Fine, But The Voice Quality/Data Rate Is Poor, Or The End Equipment Loses Synchronization From Time To Time

    From the Counters and Tracers menu, select Set Time Tracer resolution to view the Time Tracer time resolution. Change the resolution to “zoom-in” or “zoom-out” in order to locate and understand the error bursts. 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233...
  • Page 90 2.048Mbps Wireless Modem Problem 7: The system resets with an error message Use the following table to determine the source of the error messages: SALES: 0118 965 5100...
  • Page 91 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233...

  • Page 92: Another Link, Performance Degrades

    2.048Mbps Wireless Modem Problem 8: One or more links function properly (are synchronised), but when adding another link, performance degrades. Probable cause: Incorrect configuration of all units connected by the synchronization cable. Physical problems with the synchronization cable. ⇒ To check the configuration of each unit: 1.

  • Page 93: Properly

    2. Check that all the relevant channels are selected in both 2.048Mbps wireless Modems. If Fax(es) does not work properly: 1. Verify that the tone disabling method selected in the 2.048Mbps Wireless Modem matches the capabilities of the fax equipment 2.
  • Page 94 3. Check that the error rate of the LIU link is not too high. It is recommended that the LIU BUFFER ERROR RATE should not exceed 10-5 Contact Black Box Should you still have problems, contact your local Black Box. All of the phone numbers are listed at the front of this manual. SALES: 0118 965 5100...

  • Page 95: Technical Specifications

    For data rates of up to 2.048 Mbps, with E1, T1, RS-530, V.35 or X.21 interface 512Kbps Wireless Modem For data rates of up to 512kbps, with RS-530, V.35 or X.21 interface. Call Black Box for a quote for this model.
  • Page 96 2.048Mbps Wireless Modem The modem rate is selected automatically by the selected LIU Data Rate (Clock Rate), according to the following table: Table 5-2. Default Modem Rate According to Selected LIU Data Rate Channel Bandwidth The bandwidth for each channel is –20dBc at ±500KHz from carrier, regardless of bit rate.
  • Page 97 Receiver Sensitivity Retransmission of packets with errors. Elastic buffer to maintain continuous data flow. The Radio BER improvement for the various bit rates at the default delay setting is according to the following graph 2.048Mbps Wireless Modem TECHNICAL: 0118 931 2233...
  • Page 98 2.048Mbps Wireless Modem Figure 5-1. Radio BER Improvement Table 5-5. System Gain Maximum Receive Level -10dBm for modem rates: 0.5Mbps, 1Mbps, 2Mbps. -25dBm for modem rate of 3Mbps. Recommended Receive Level 10dB above sensitivity threshold for an adequate fade margin.
  • Page 99 3db in the sensitivity of the receiver. The graph below displays the adjacent channel rejection of the modem receiver as a function of the frequency separation (Delta F in MHz) between the frequency of the interfering signal and the desired signal.
  • Page 100 2.048Mbps Wireless Modem Maximum Number of Links to Synchronize Table 5-6. Maximum Number of Synchronized Links Filter Curves Filter curves for the transmitter and receiver are shown in the graph below. Note that the receiver contains two cascaded filters of this type.

  • Page 101: Line Interface Specifications

    Bipolar AMI or B8ZS Impedance: E1 Interface Data Rate: 2048 Kbps Type: CEPT-I, meets CCITT G.703 and G.823 Connector: 2 x BNC (unbalanced), RJ-45 (balanced) Line Code: HDB3 or AMI Impedance: (unbalanced), 12 2.048Mbps Wireless Modem (balanced). TECHNICAL: 0118 931 2233...
  • Page 102 2.048Mbps Wireless Modem Fractional T1 Interface Data Rate: 1544 Kbps Type: DSX-1, meets CCITT G.703, G.704 and G.823 Connector: RJ-45 Line Mode: Bipolar AMI or B8ZS Impedance: Fractional E1 Interface Data Rate: 2048 Kbps Type: CEPT-I, meets CCITT G.703, G.704 and G.823...

  • Page 103: Front Panel Led Indicators

    AC Appliance Inlet or 48 VDC terminal block DTE: Modular Monitor: D-Type 9-pins female In/Out 2 x molex jack, 4-pin (mate with FCC 68 plugs) Synchronization - LOS (Loss of Signal), T1/E1 only TECHNICAL: 0118 931 2233 2.048Mbps Wireless Modem...

  • Page 104: Mechanical Specifications

    100 - 240 VAC or 18 - 72 VDC, 25 W max. Management Monitoring, diagnostics and configuration. Interface - V.24/RS-232, 9 pins D Type female connector. Access using a locally connected ASCII terminal or remotely via dial-up modem. Remote unit management, through the wireless link. Mechanical Specifications Dimensions Standard 1U half 19”...

  • Page 105: Antennas Sets

    - 8.5dBi, 8.5dBi. Basic – 12 dBi, 12dBi Medium Gain - 12dBi, 18dBi. High Gain – 12, 24dBi. TPA 24 Technical Specifications Models used with 2.048Mbps Wireless Modem: TPA 24 LH. Input Power: Output Power: Input Impedance: Output Impedance:...

  • Page 106: Al-1 Technical Specifications

    2.048Mbps Wireless Modem Connectors LNA 10 Power Inserter • To CONV: F-type, female Power Supply Required Voltage: Required Current: Operating Temperature: Dimensions: Operating Environment: • LNA 10 • Power Supply • Power Inserter Technical specifications are listed as provided by the manufacturer...
  • Page 107 Operating Environment: Grounding: One of the female-type N connectors is mounted directly through a hole in the shelter wall and held in place with a lockwasher and nut. Indoor/Outdoor TECHNICAL: 0118 931 2233 2.048Mbps Wireless Modem...

  • Page 108: Appendix A - V.35/Rs-530/X.21 Applications

    LIU board and through theRS-232 monitor. It is important to note that modem assumes that the clock frequency on both sides of the link is exactly the same, therefore the clock frequency can be forced on the Master side of the link only.

  • Page 109: 2.048Mbps Wireless Modem Standard Configuration

    DTE is identical to the clock supplied by the 2.048Mbps Wireless Modem Standard Configuration Figure A-1. Standard modem Application Both wireless modem units are configured as DCE, internal clock. Either unit A or B can be defined as the Master unit. Synchronizing your Modem to Another Network Figure A-2.

  • Page 110: Connecting Your 2.048Mbps Wireless Modem To Another Modem

    Modem B is configured as “Slave”, DCE internal clock. Connecting your 2.048Mbps Wireless Modem to another modem Modem A is defined as a DCE. It supplies the clock for the 2.048Mbps Wireless Modems. 2.048Mbps Wireless Modem A is configured as “Master”, DTE (except in applications with an X.21 interface).

  • Page 111: Dce Options

    2.048Mbps Wireless Modem DCE Options 1. DCE, internal clock - Supported by V.35, RS-530 and X.21. Jumper configuration: Figure A-5. DCE, Internal Clock Jumpers 2. DCE, external clock - Supported by V.35 and RS-530. Jumper configuration: Figure A-6. DCE, External Clock Jumpers...

  • Page 112: Dte Options

    2.048Mbps Wireless Modem DTE Options 1. DTE - Supported by V.35, RS-530. Jumper configuration: 2. DTE - Supported by X.21. Jumper configuration: Setting the DCE/DTE Mode Parameter To set the DCE/DTE mode: 1. From the Setup and Configuration Main menu, type 1 to access the Parameters menu.
  • Page 113 2.048Mbps Wireless Modem Type 3 for DTE (X.21) mode Valid selections are in accordance with following guidelines: DCE internal clock (V.35 & Rs-530 & X.21)- Supported by V.35, RS-530and X.21 DCE external clock (V.35 & RS-530)- Supported by V.35 and RS-530 DTE (V.35 &...

  • Page 114: Appendix B - E1 / T1 Applications

    One end equipment unit is the source of the clock and is called “CO” (Central Office). The other unit uses loopback timing (i.e. lock on the CO clock and return it) and is called PBX. The modem connected to the CO is configured as Master, and the other modem as Slave.

  • Page 115: E1/T1 Liu Jumper Settings

    In addition to the faults mentioned in the above table, there is a possibility of a cable being disconnected or shortened. Both these situations usually result in LOS indication either by the modem or by the end equipment. E1/T1 LIU Jumper Settings The LIU default setting is E1 balanced or T1 balanced, unless an E1 unbalanced configuration is specified.
  • Page 116 2.048Mbps Wireless Modem Figure B-2. E1/T1 Board Location To access the jumpers: 1. Disconnect all cables, including the power cable, from the unit. 2. Loosen and remove the two screws on the rear panel. Carefully slide out the boards. The jumpers are located at the bottom side of the LIU board shown in Figure B-3.
  • Page 117 2.048Mbps Wireless Modem Figure B-3. E1 Unbalanced (Coax connector, 75 W) Figure B-4. E1 balanced (RJ-45 connector, 120 W) Figure B-5. T1 balanced (RJ-45 connector, 100 W) TECHNICAL: 0118 931 2233...

  • Page 118: T1 Csu/Dsu Applications

    DSX-1 standard, the Pulse Shape Parameter should be set according to the line length. In several applications, the modem may be connected to CSU/DSU equipment, as shown in Figure B-7. This type of connection may be chosen because of a technical (e.g., a special MUX interface not supported by 2.048Mbps Wireless Modem) or some other reason.

  • Page 119: E1/T1 Back-To-Back Configuration

    2.048Mbps Wireless Modem E1/T1 Back-to-Back Configuration Figure B-8. E1/T1 Back-to-Back Configuration TECHNICAL: 0118 931 2233...

  • Page 120: Appendix C - Fractional E1/T1 Applications

    For example, in a fractional E1 application with 4 channels in use, the effective data rate of the modem is 320Kbps (4 data channels plus 1 channel for frame alignment signals TSO), and the default modem rate is just 0.5Mbps vs.
  • Page 121 (8+1)*64 = 576Kbps. In fractional T1 applications, the modem will add a full 64Kbps channel for signalling. The maximal data rate of the modem for a 24 channel T1 is therefore 1600Kbps, vs. the 1544Kbps of a regular T1. In Fractional E1using Common...

  • Page 122: Fractional E1 Liu Jumper Settings

    In addition to the faults mentioned in the above table, there is a possibility of a cable being disconnected or shortened. Both these situations usually result in LOS indication either by the 2.048Mbps Wireless Modem or by the end equipment. Fractional E1 LIU Jumper Settings The Fractional E1 LIU default setting is balanced, unless a Fractional E1 unbalanced configuration is specified.
  • Page 123 2.048Mbps Wireless Modem Figure C-2. Fractional E1 Board Location To access the jumpers: 1. Disconnect all cables, including the power cable, from the unit. 2. Loosen and remove the two screws on the rear panel. Carefully slide out the boards. The jumpers are located at the upper side of the LIU board shown in Figure C-3.
  • Page 124 2.048Mbps Wireless Modem Figure C-3. Fractional E1 Unbalanced (Coax connector, 75 W) Figure C-4. Fractional E1 balanced (RJ-45 connector, 120 W) SALES: 0118 965 5100...

  • Page 125: Fractional T1 Csu/Dsu Applications

    Figure C-7. This type of connection may be chosen because of a technical (e.g., a special MUX interface not supported by 2.048Mbps Wireless Modem) or other reason. This type of connection is referred to as a CSU network connection and the...

  • Page 126: Fractional E1/T1 Back-To-Back Configuration

    2.048Mbps Wireless Modem Fractional E1/T1 Back-to-Back Configuration Figure C-7. Fractional E1/T1 Back-to-Back Configuration Echo Cancellation in Fractional E1/T1 Applications Regular telephony systems use 4 wires circuits: one pair for the transmitted signal (microphone) and one pair for the received signal (earphone). The transmission system is comprised of a single pair (2 wires) and a hybrid component used for the required conversion from 4- to 2-wires and vice versa.

  • Page 127: Potential Problems In Fractional E1/T1 Applications

    To support identification of modem and fax signals by echo canceller circuits, these devices transmit a signal at 2100Hz. Upon detection of such a signal the echo canceller will be disabled for the duration of the presence of this signal.

  • Page 128: Appendix D - Installing Other Types Of Receive Amplifiers

    General The 2.048Mbps Wireless Modem supports other types of Receive Amplifiers which are not supplied by Black Box. Following are some tips regarding installation of different types of Receive Amplifiers. The installation of other types of Receive Amplifiers is usually similar to the installation of the LNA-10.
  • Page 129 2.048Mbps Wireless Modem Figure D-2. Jumper Setting for 12 VDC Power Supply To supply DC input through the RF cable 1. Connect the RF + Power Cable directly to the RF input in the Receive Amplifier. 2. Set the jumper Jp1 in the Rx Radio module to 12 VDC.

  • Page 130: Appendix E - Pin Assignments

    2.048Mbps Wireless Modem Appendix E – Pin Assignments E1/T1 and Fractional E1/T1 Pin Connections Table E-1. E1/T1 and Fractional E1/T1 Pin Connections LIU RS-530 Connector Pin Assignments Figure E-1. LIU RS-530 Pin Assignments. SALES: 0118 965 5100...

  • Page 131: Liu D-25 To V.35 Cable Pin Assignments

    2.048Mbps Wireless Modem LIU D-25 to V.35 Cable Pin Assignments Figure E-2. LIU D-25 to V.35 Cable Pin Assignments. TECHNICAL: 0118 931 2233...

  • Page 132: Liu D-25 To X.21 Cable Pin Assignments

    2.048Mbps Wireless Modem LIU D-25 to X.21 Cable Pin Assignments Figure E-3. LIU D-25 to X.21 Cable Pin Assignments SALES: 0118 965 5100...

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