How to connect two routers back-to-back using ISDN BRI?

[limtohsoon]

Hi Sir,

I have two routers. Each router has an ISDN BRI S/T port. I have only one ISDN BRI line.

I'd like to perform a back-to-back ISDN connection between these two routers. Do you have any reference guide on how to set it up using only a single ISDN line? My telco switch type is basic-net3.

Thank you.

B.Rgds,

Lim TS

[makchitale]

In your case you will need 2 ISDN BRI lines, one each between the router & ISDN switch.

ISDN BRI requires a switching device in the circuit to work; it’s not as simple as reversing tip and ring - you could use an ISDN simulator for this purpose.

ISDN back to back is possible using the following cards: VIC-2BRI-ST & VIC-2BRI-NT/TE (NOTE, these are mainly used for Voice applications & if I understand correctly this is not what you are looking for)

http://www.cisco.com/en/US/tech/tk652/tk653/technologies_configuration_example09186a008010ef6c.shtml

ISDN simulator is the best bet.

Thanks, Mak

[colin]

Mak,

Tried this, and it works a treat. :-)

Cheers,

-colin.