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New Member

No DTMF over CUBE - CUCM - MGCP - ISDN

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

2 REPLIES
VIP Super Bronze

No DTMF over CUBE - CUCM - MGCP - ISDN

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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New Member

Re: No DTMF over CUBE - CUCM - MGCP - ISDN

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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