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DX-120 Installation and Maintenance Manual
O
VERVIEW
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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