Cisco Cisco VN 2900 Network Adaptation Interface Installation Guide

ISDN BRI voice interface cards have three LEDs, as listed in 

.

A Direct Inward Dial (DID) voice interface provides DID service to extensions on a PBX. 

 

shows the VIC-2DID card, and 

 shows the VIC-4FXS/DID card.

To comply with the Telcordia GR-1089 NEBS standard for electromagnetic compatibility and safety, 
connect the 4-port FXS/DID card (VIC-4FXS/DID) only to intra-building or non-exposed wiring or 
cabling. The intrabuilding cable must be shielded and the shield must be grounded at both ends.

Each port on the 4-port FXS/DID VIC can be configured as either Foreign Exchange Station (FXS) or 
Direct Inward Dial (DID) when it is used with phones with a Ringer Equivalence Number (REN) load 
of 1 or less. 

If the REN load on any port is greater than 1, all four ports must be configured as either FXS or DID. 
For information about using FXS with the 4-port FXS/DID VIC, see the 

Cisco 2600XM series, Cisco 2691, Cisco 2800 series, Cisco 3600 series, Cisco 3700 series, and 
Cisco 3800 series routers support DID on the 4-port FXS/DID cards in Cisco IOS Release 12.3(14)T and 
later.

B1

Call active on B1 channel

B2

Call active on B2 channel

OK

Interface is connected to an ISDN network

36014

SEE MANUAL BEFORE INSTALLATION

VIC

2DID