Installation guide

Connecting WAN and Voice Interface Cards to a Network 3-31
2-Port ISDN BRI Card
ISDN BRI Card Considerations
To use all four voice channels, you must install the ISDN BRI card in slot 0 of a two-slot
voice network module (Cisco part number NM-2V). Slot 1 should remain empty.
Note If slot 0 is unoccupied, the system treats it as a pair of analog voice ports.
If you install any of the following configurations, the Cisco IOS software disables certain
ports, as shown in Table 3-6:
• An ISDN BRI voice interface card in a one-slot voice network module (Cisco part
number NM-1V)
• Two ISDN BRI voice interface cards in a two-slot voice network module
• One ISDN BRI voice interface card and one analog voice interface card (VIC-2FXS,
VIC-2FXO, VIC-2FXO-EU, VIC-2FXO-M3, or VIC-2E/M) in a two-slot voice
network module
Table 3-6 Voice Interface Card Configurations
Network
Module Slot Voice Interface Card Port Status
NM-1V 0 VIC-2BRI-S/T-TE 0 Up
1Down
NM-2V 0 VIC-2BRI-S/T-TE 0 Up
1Up
NM-2V 0 VIC-2BRI-S/T-TE 0 Up
1Up
1 VIC-2BRI-S/T-TE 0 Down
1Down
NM-2V 0 VIC-2BRI-S/T-TE 0 Up
1Up