I am looking for some feedback from voice users who had SIP trunk to PSTN and dealed with AT&T conference system. I have two issues here:
1. DTMF is not recognized by AT&T conference number (+1 215-446-0183). I have set the UCM 8.0 SIP trunk using RFC2833 as DTMF method. I read a doco saying Cisco rtp-nte DTMF is not so compatible with AT&T thus I have to add these config for inbound dial-peer to UCM.
rtp payload-type nse 99
rtp payload-type nte 100
Has anyone used the above and has got the DTMF work? Is there anything else I need to setup for getting away of the DTMF problem?
2. the AT&T conference calls were always dropped at around 9 - 10 minutes. I tried with the below config but still having call drop:
I'm not able to access my old voice mail messages all of a sudden. The recording says something like 'the message is currently not available'. This has never happened before in all the years I have been using this system. I have t...