Cisco Cisco 2600 3600 Series 1-Port 30-Channel J1 Voice Fax Network Module Manuale Tecnico

VIC2−2BRI−NT−TE
2−Port ISDN BRI
VIC, S/T interface,
NT, TE

12.2(15)ZL,
12.3(2)XA,
12.3(2)XC,
12.3(2)XE,
12.3(4)T,
12.3(5)

Not Supported

12.2(15)ZJ, 12.3(4)T

12.2(15)ZJ,
12.3(4)T
(Not
supported
for Cisco
3620.

4

)

12.2(15)ZJ,
12.3(4)T

12.2(15)ZJ,
12.3(4)T,
12.3(4)XD

Not
Supported

1

 Voice requires a Cisco IOS Software Voice feature set on the 1700 series router, and a Cisco IOS Software

Plus feature set on the 2600/3600 series router.

2

 Voice is not supported on the 3631 router.

3

Cisco 1750 router platforms do not support the BRI VICs.

4

Cisco 3620 series routers do not support the VIC2−2BRI−NT−TE cards.

Some of the known issues with the BRI VICs are discussed in this section.

When the BRI voice interfaces are configured, this error message is received:

%C542−1−INSUFFICIENT_DSPS: VNM(1), cannot support all voice channels on VICs.

This is because the VIC−2BRI−S/T−TE can have more B channels than the Voice Network Module can
handle. The NM−1V can handle two voice calls (has two DSPs). The NM−2V can handle four voice calls
(four DSPs). For more information on this, refer to the error message %C542−1−INSUFFICIENT_DSPS
(registered customers only) in the Error Message Decoder (registered customers only)

Another known problem is due to Cisco bug ID CSCdv00152 (registered customers only) .

The compand−type a−law command does not exist on the CLI for a BRI port.

This bug restricted the use of the BRI−VIC to North America, as it resulted in the wrong compand decoding
being applied and caused distorted voice. It was introduced in Cisco IOS Software Releases12.2(2) and
12.2(3)T, and corrected in the 12.2(5) and 12.2(8)T releases.

One of the applications of the BRI VICs is shown in this example. Observe that the BRI VIC can be directly
connected to the PSTN or the ISDN PBX.