Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

E1 cannot accept following digits

Hi all,

I have a very strange case regarding E1. We use E1 as PSTN trunk. The line number is xxxxxx00 - xxxxxx99 which maps exactly to users extension xxx00 - xxx99.

We use xxx00 as the CTI Route Point which forwards the call to IVR. Currently, calls to xxxxxx00 has behaves unusual. Some inbound call from certain operators are answered by IVR, but the following digits inputted by the caller are not accepted / read. But the other callers from different operators doesn't feel so.

We are heading to a deadlock, since neither of the side (provider and us) can point out where is the problem ? Is there any relation to E1 setting in CCM. We use MGCP and CCM 4.1(3)SR5b. Thank you.



Re: E1 cannot accept following digits

You mean DTMF digits not being recognized by IVR?

Check mgcp dtmf commands

mgcp dtmf-relay codec all mode out-of-band

New Member

Re: E1 cannot accept following digits

The command has been configured in the VG. There is no issue with this command. Any other possibility ?

Hall of Fame Super Gold

Re: E1 cannot accept following digits


you need to configure the CCM for overlap. If you have trouble doing that in MGCP mode, try H.323 with "isdn overlap-receiving.