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ISDN backup DDR via external ISDN modem

I have several remote sites that will be set up to use ISDN as a backup if the data T1 fails.

At each remote site, I am planning on having an external ISDN terminal adapter attached to the AUX port.

Since the ISDN TA has a serial interface it should operate just like a standard analog modem. I do realize that the AUX port is limited to 115k where the ISDN would max at 128k with both channels running. Is there any issue to this than just a slight reduction in speed?

Are there any gotchas that I am missing here?

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Bronze

Re: ISDN backup DDR via external ISDN modem

As far as I know, it is not possible to use ISDN TA with AUX port.

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