BRI Configuration as Backup link.

[ciscovoipsupport]

Does anyone know if we setup back-2-back BRI using 2x WIC-1B-S/T-V3 ?

Using 2901 router.

[ciscovoipsupport]

Anyone..?

[paolo bevilacqua]

Likely not, but you can check if you can configure the isnd network side commands.

[dojoy · Accepted solution]

Using the WIC-1B-S/T-V3 Interface alone you wont be able to simulate the back to back.

Reason: WIC-1B-S/T-V3 does not emulate as network.

e.g. : isdn layer1-emulate network Command wont work.

You will have to use an NT/TE Interface to simulate a ISP Side. This interface can support voice calls. Not data calls.

Below is the minimum commands required for the ISDN link to come up.

NT/TE Interface:

interface BRI0/1/0

no ip address

isdn switch-type basic-net3

isdn protocol-emulate network

isdn layer1-emulate network

isdn skipsend-idverify

end

S/T Interface:

interface BRI0/2/0

no ip address

isdn switch-type basic-net3

end

Hope this helps.

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Regards