No DTMF tones to PSTN over MGCP Gateway

Unanswered Question
Mar 20th, 2007

Hello,

when a Phone is connected to a service and sends DTMF tones the tones are not recognized. Seems like the Gateway does not transmit the tones.

MGCP uses follwing DTMF configuration with the BRI interface on basic-net3:

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

What can i do?

with kind Regards

i.A. Martin

I have this problem too.
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gogasca Tue, 03/20/2007 - 13:31

Could you please try to turn on:

debug mgcp packet

debug vpm signal

debug vtsp tone

and upload the info.

Thanks

joerg.loeschmann Tue, 03/20/2007 - 23:51

Hello,

here is the trace. Seems like the gateway gets the tones.

Regards

Martin

*Mar 21 06:40:44.287: MGCP Packet received from 192.168.3.230:2427--->

CRCX 1058 [email protected]_srst MGCP 0.1

C: D00000000100027d000000F500000006

L: p:20, a:PCMU, s:off, t:b8

M: recvonly

<---

*Mar 21 06:40:44.299: MGCP Packet sent to 192.168.3.230:2427--->

200 1058 OK

I: 7

v=0

c=IN IP4 192.168.3.249

m=audio 17710 RTP/AVP 0 100

a=rtpmap:100 X-NSE/8000

a=fmtp:100 192-194

<---

*Mar 21 06:40:44.999: MGCP Packet received from 192.168.3.230:2427--->

MDCX 1059 [email protected]_srst MGCP 0.1

C: D00000000100027d000000F500000006

I: 7

X: 2

L: p:20, a:PCMU, s:off, t:b8

M: sendrecv

R: D/[0-9ABCD*#]

S:

Q: process,loop

v=0

o=- 7 0 IN EPN [email protected]_srst

s=Cisco SDP 0

t=0 0

m=audio 26226 RTP/AVP 0

c=IN IP4 192.168.3.157

<---

*Mar 21 06:40:45.003: MGCP Packet sent to 192.168.3.230:2427--->

200 1059 OK

<---

*Mar 21 06:40:46.987: MGCP Packet received from 192.168.3.230:2427--->

RQNT 1060 [email protected]_srst MGCP 0.1

X: 2

R: D/[0-9ABCD*#]

S: D/#

Q: process,loop

<---

*Mar 21 06:40:46.987: MGCP Packet sent to 192.168.3.230:2427--->

200 1060 OK

<---

*Mar 21 06:40:50.523: MGCP Packet received from 192.168.3.230:2427--->

RQNT 1061 [email protected]_srst MGCP 0.1

X: 2

R: D/[0-9ABCD*#]

S: D/9

Q: process,loop

<---

*Mar 21 06:40:50.527: MGCP Packet sent to 192.168.3.230:2427--->

200 1061 OK

<---

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