VIC2-2BRI-NT/TE back to back

Unanswered Question
May 25th, 2009


I have this VIC card installed on both a 2801 and 2811, I have tried connecting the two back to back using different cables but have no luck, I have used a normal straight through and a cross over and I have also used a cable with pins 3 and 4 to 5 and 6.

Layer 1 is showing deactivated and I am not sure how to bring them up.

interface BRI0/1/0

no ip address

isdn switch-type basic-net3

isdn point-to-point-setup

isdn layer1-emulate network


interface BRI0/0/0

no ip address

isdn switch-type basic-net3

isdn point-to-point-setup

isdn incoming-voice voice

Appreciate your help.

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Overall Rating: 4 (1 ratings)
Brandon Svec Mon, 05/25/2009 - 22:12

I think you need to use:

isdn layer1-emulate network

isdn protocol-emulate network


isdn layer1-emulate user

isdn protocol-emulate user

to accomplish this. Probably the 3,4 to 5,6 cable as well.

hadisharifi Mon, 05/25/2009 - 22:54

Thanks for the info it was the isdn point-to-point-setup command and I have got this part of it working.

I am not able to make any calls across it it gives me a secondary dialtone. Below is the debug isdn q931 output.

*May 26 07:54:41.318: ISDN BR0/1/1 Q931: Applying typeplan for sw-type 0x1 is 0x0 0x0, Calling num 411

*May 26 07:54:41.322: ISDN BR0/1/1 Q931: Sending SETUP callref = 0x000D callID = 0x800F switch = basic-net3 interface = Network

*May 26 07:54:41.322: ISDN BR0/1/1 Q931: TX -> SETUP pd = 8 callref = 0x0D

Bearer Capability i = 0x8090A3

Standard = CCITT

Transfer Capability = Speech

Transfer Mode = Circuit

Transfer Rate = 64 kbit/s

Channel ID i = 0x89

Exclusive, B1

Progress Ind i = 0x8183 - Origination address is non-ISDN

Display i = 'Frank'

Calling Party Number i = 0x0080, '411'

Plan:Unknown, Type:Unknown

Called Party Number i = 0x80, '511'

Plan:Unknown, Type:Unknown

*May 26 07:54:41.370: ISDN BR0/1/1 Q931: RX <- CALL_PROC pd = 8 callref = 0x8D

Channel ID i = 0x89

Exclusive, B1

*May 26 07:54:41.386: ISDN BR0/1/1 Q931: RX <- CONNECT pd = 8 callref = 0x8D

Channel ID i = 0x89

Exclusive, B1

*May 26 07:54:41.390: %ISDN-6-CONNECT: Interface BRI0/1/1:1 is now connected to 511 N/A

*May 26 07:54:41.390: ISDN BR0/1/1 Q931: TX -> CONNECT_ACK pd = 8 callref = 0x0D

*May 26 07:54:44.206: %ISDN-6-DISCONNECT: Interface BRI0/1/1:1 disconnected from 511 , call lasted 2 seconds

*May 26 07:54:44.210: ISDN BR0/1/1 Q931: TX -> DISCONNECT pd = 8 callref = 0x0D

Cause i = 0x8290 - Normal call clearing

*May 26 07:54:44.230: ISDN BR0/1/1 Q931: RX <- RELEASE pd = 8 callref = 0x8D

Cause i = 0x8090 - Normal call clearing

*May 26 07:54:44.234: ISDN BR0/1/1 Q931: TX -> RELEASE_COMP pd = 8 callref = 0x0D

Brandon Svec Tue, 05/26/2009 - 07:27

Is one side set to 'user' and one to 'network"? I don't work with BRI much (ever), but with PRI a lot and I know that would be important for a setup like this.

Paolo Bevilacqua Tue, 05/26/2009 - 09:20

On the router that receives the call, configure:

dial-peer voice 1 pots

incoming called-number .


Recommend you read more documentation before working with routers because all you're asking is explained in there.

hadisharifi Tue, 05/26/2009 - 17:22

Thanks guys, I managed to get it working there was a redundant incoming dialpeer which was used for incoming calls and it didn't have the direct-inward-dial.

p.bevilacqua, I know about working on a router but there are certain things which may seem obvious but is not and the documentation can not resolve it. Appreciate your recommendation but it's not always the case to refer to the doco hence there is sites like this one. I had another dialpeer which was being used for incoming calls.


Paolo Bevilacqua Tue, 05/26/2009 - 18:51


I did not mean that you don't use due diligence, but simply that answers to issues like "bri network side" or "dialtone calling into router" are easily found using the forum or cco searchbox, because these are frequently asked.

No problem anyway and good luck.


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