09-18-2013 03:17 AM - edited 03-16-2019 07:26 PM
Hello,
I have problems with DTMF ...
This is my topology/callflow:
3rd Party telephone system - SIP(DTMF with RFC 2833) - CUBE - SIP - CUCM - MGCP - ISDN
We hear only very short "tuts"
DTMF are OK from 3rd Party tel. system to CUBE to CUCM - ATA
DTMF are OK from IP-Phone or ATA to MGCP - ISDN
but not over the CUBE
This are the dielpeers on CUBE:
dial-peer voice 30 voip
corlist incoming CSS-ESV
description *** incoming calls from ESV ***
session protocol sipv2
session transport udp
incoming uri via 3
incoming uri from 3
voice-class codec 1 offer-all
media-class 1
dtmf-relay rtp-nte
ip qos dscp cs3 signaling
no vad
dial-peer voice 11 voip
corlist outgoing PT-TKLO
description *** outgoing to TKLO ***
destination-pattern +437327720T
session protocol sipv2
session target ipv4:10.211.1.24
session transport udp
voice-class codec 1 offer-all
media-class 1
dtmf-relay rtp-nte sip-notify sip-kpml
ip qos dscp cs3 signaling
no vad
MGCP Config:
ccm-manager switchback immediate
ccm-manager fallback-mgcp
ccm-manager redundant-host UCLI01-007.voip.ooe.gv.at
ccm-manager mgcp
no ccm-manager fax protocol cisco
ccm-manager music-on-hold
!
mgcp
mgcp call-agent UCLI01-003.voip.ooe.gv.at service-type mgcp version 0.1
mgcp dtmf-relay voip codec all mode out-of-band
mgcp rtp unreachable timeout 1000 action notify
mgcp modem passthrough voip mode nse
mgcp voice-quality-stats all
mgcp ip qos dscp cs3 signaling
mgcp package-capability rtp-package
mgcp package-capability sst-package
mgcp package-capability pre-package
mgcp package-capability srtp-package
mgcp package-capability fm-package
no mgcp package-capability res-package
no mgcp package-capability fxr-package
no mgcp timer receive-rtcp
mgcp sdp simple
mgcp fax t38 inhibit
mgcp rtp payload-type g726r16 static
mgcp bind control source-interface Loopback0
mgcp bind media source-interface Loopback0
!
mgcp profile default
Has someone an idea?
best regards
Martin
09-18-2013 03:37 AM
Martin,
From your config you have two types of DTMF..RTP-NTE and OOB. Your SIP leg uses RTP-NTE and your MGCP uses OOB. For this to work, you will need to either
1. Use MTP to convert between the two DTMF methods
2. Configure RFC2833 on your MGCP gateway
mgcp dtmf-relay voip codec all mode [nte-ca|nte-ga]
If you decide to use option 2, dont forget to shutdow mgcp and start it again. Please be aware that this may cause interruptions to calls.
conf t
no mgcp
mgcp
Test again
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09-19-2013 01:08 AM
Hello aokanlawon,
In the evening, I changed the configuration on the mgcp gateways to mgcp dtmf-relay voip codec all mode nte-gw
and reset it - no mgcp - mgcp
but it still does not work. :-(
what can we do? MTP on the SIP Trunk to CUBE is enabled!
best regards
Martin
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