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2.048Mb
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s Wireless Modem
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Problem 9: The fractional E1/T1 link is synchronised, but one or some systems that are
connected to the end equipment (i.e. telephone, fax voicemail) is not working
properly...........................................................................................................93
Technical Specifications.........................................................................................................................95
Wireless Modem Technical Specifications................................................................................95
Models.........................................................................................................................95
Radio Type ..................................................................................................................95
Transmission Technique..............................................................................................95
Line Interface Specifications......................................................................................101
Front Panel LED Indicators........................................................................................103
Connectors ................................................................................................................103
Mechanical Specifications..........................................................................................104
Environmental Specifications.....................................................................................104
Standards ..................................................................................................................104
Antennas Sets............................................................................................................105
TPA 24 Technical Specifications.............................................................................................105
LNA-10 Technical Specifications ............................................................................................105
AL-1 Technical Specifications.................................................................................................106
Appendix A - V.35/RS-530/X.21 Applications ......................................................................................108
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
Appendix B - E1 / T1 Applications........................................................................................................114
Introduction.............................................................................................................................114
E1/T1 Connections and Common Problems - Link Setup.......................................................114
E1/T1 LIU Jumper Settings.....................................................................................................115
T1 CSU/DSU Applications ......................................................................................................118
E1/T1 Back-to-Back Configuration..........................................................................................119
Appendix C – Fractional E1/T1 Applications........................................................................................120
Introduction.............................................................................................................................120
When to Use the Fractional E1/T1 LIU ...................................................................................120
Fractional E1 LIU Jumper Settings .........................................................................................122
Fractional T1 CSU/DSU Applications......................................................................................125
Fractional E1/T1 Back-to-Back Configuration.........................................................................126
Echo Cancellation in Fractional E1/T1 Applications................................................................126
Potential Problems in Fractional E1/T1 Applications...............................................................127