From: Forest Riek (forestr@xxxxxxx)
Date: Thu Aug 03 2000 - 05:38:10 GMT-3
Question,
Do you have a digital modem card in the 3640? It is required to terminate the
in-bound analog users.
What is happening is, the in-bound call is tag on the call setup as a analog
call. If your router does not have the digital modem card, it will reject the
call, thus giving the caller a busy signal.
Turn on debug isdn q.921 and q.931 and you will see the call reaching the
router.
I hope this helps.
Forest
zhencai wrote:
> Hi,
>
> I have a T1 PRI line (Cisco 3640 router), ISDN dials in and dials out no
> problem but analog doesn't work (users can't access using modem). When they
> dial the number, it gives busy signal. I run some debug and found out that
> the call didn't make to the router at all. Any idea what's wrong? (I
> configured "isdn incoming-voice modem")
>
> Thanks a lot.
>
> Zhen Cai
>
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