Vertical Edge 120 Specifications Page 33

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DX-120 Installation and Maintenance Manual OVERVIEW
ISDN Card (T1/PRI Module) Details
The ISDN Card (T1/PRI Module) allows for expansion of the DX-120 system CO line interface to a capacity
maximum of 23 Digital CO line ports.
ISDN Card (T1/PRI Module)
D10 Signaling Synchronization indicator Synchronous = Green lit
Non-Synchronous = Dark
Clock source On-board crystal and can be set as master or slave to synchronize
with PSTN, depending upon the networking requirement.
Backplane connector 15-pin
Backplane interface covers the following:
Power feeding •5 VDC
PCM highway System will provide an 8KHz frame signal for T1 card’s
synchronization.
Control data interface Compatible with SPI (Serial Peripheral Interface) bus timing.
ISDN Card (T1/PRI Module) Details
Capacity: One (1) T1(1.544Mbps, 24channels) interface
Network interface mode ISDN (T1/PRI) Interface
Network connector RJ-45
LED indicator ISDN (T1/PRI) Card has 9 LEDs on the PCB which indicate alarms of
T1 trunk,
in-use status, and synchronous clock enable status.
ISDN Card (T1/PRI Module) Details (continued on next page)
T1 Card (T1 Module) Details (continued)
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