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New Member

MGCP FXO outbound call deleted prematurely

Hi,

I have CUCM 6.0 running in US HQ and a C2801 which has FXO port connected to local PSTN in remote UK office, I configured outbound dial plan for UK local number. The call is corrected routed to C2801 MGCP gateway, but just before a call from VoIP phone to UK local number is connected, MGCP deletes the call. MGCP debug is shown below, 10.1.9.190 is HQ VoIP phone, 172.30.0.253 is C2801 MGCP.

uk-srst#debug mgcp packets

Media Gateway Control Protocol packets debugging for all endpoints is on

uk-srst#

Mar 17 17:39:00.434: MGCP Packet received from 10.1.9.6:2427--->

CRCX 81561 AALN/S0/SU0/0@uk-srst.vocera.local MGCP 0.1

C: A0000000027c74fa000000F5

X: 0

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

M: recvonly

R: H/oc, H/of, L/hd

S: H/sup(addr(9,8,3,3,4,7,3))

Q: process,loop

<---

Mar 17 17:39:03.442: MGCP Packet received from 10.1.9.6:2427--->

CRCX 81561 AALN/S0/SU0/0@uk-srst.vocera.local MGCP 0.1

C: A0000000027c74fa000000F5

X: 0

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

M: recvonly

R: H/oc, H/of, L/hd

S: H/sup(addr(9,8,3,3,4,7,3))

Q: process,loop

<---

Mar 17 17:39:03.478: MGCP Packet sent to 10.1.9.6:2427--->

200 81561 OK

I: 5

v=0

c=IN IP4 172.30.0.253

m=audio 16528 RTP/AVP 0 100

a=rtpmap:100 X-NSE/8000

a=fmtp:100 192-194,200-202

a=X-sqn:0

a=X-cap: 1 audio RTP/AVP 100

a=X-cpar: a=rtpmap:100 X-NSE/8000

a=X-cpar: a=fmtp:100 192-194,200-202

a=X-cap: 2 image udptl t38

<---

Mar 17 17:39:03.482: MGCP Packet sent to 10.1.9.6:2427--->

NTFY 119743622 aaln/S0/SU0/0@uk-srst.vocera.local MGCP 0.1

N: ca@10.1.9.6:2427

X: 0

O: L/hd

<---

Mar 17 17:39:03.650: MGCP Packet received from 10.1.9.6:2427--->

200 119743622

<---

Mar 17 17:39:03.654: MGCP Packet sent to 10.1.9.6:2427--->

NTFY 119743623 aaln/S0/SU0/0@uk-srst.vocera.local MGCP 0.1

N: ca@10.1.9.6:2427

X: 0

O: H/oc

<---

Mar 17 17:39:03.654: MGCP Packet sent to 10.1.9.6:2427--->

NTFY 119743624 aaln/S0/SU0/0@uk-srst.vocera.local MGCP 0.1

N: ca@10.1.9.6:2427

X: 0

O: H/oc

<---

Mar 17 17:39:03.742: MGCP Packet received from 10.1.9.6:2427--->

MDCX 81562 AALN/S0/SU0/0@uk-srst.vocera.local MGCP 0.1

C: A0000000027c74fa000000F5

I: 5

X: 0

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

M: sendrecv

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

S:

Q: process,loop

v=0

o=- 5 0 IN EPN AALN/S0/SU0/0@uk-srst.vocera.local

s=Cisco SDP 0

t=0 0

m=audio 16444 RTP/AVP 0

c=IN IP4 10.1.9.190

<---

Mar 17 17:39:03.750: MGCP Packet sent to 10.1.9.6:2427--->

200 81562 OK

<---

Mar 17 17:39:03.822: MGCP Packet received from 10.1.9.6:2427--->

200 119743623

<---

Mar 17 17:39:03.822: MGCP Packet received from 10.1.9.6:2427--->

200 119743624

<---

Mar 17 17:39:08.485: MGCP Packet received from 10.1.9.6:2427--->

MDCX 81565 AALN/S0/SU0/0@uk-srst.vocera.local MGCP 0.1

C: A0000000027c74fa000000F5

I: 5

X: 0

M: recvonly

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

S:

Q: process,loop

<---

Mar 17 17:39:08.493: MGCP Packet sent to 10.1.9.6:2427--->

200 81565 OK

<---

Mar 17 17:39:08.665: MGCP Packet received from 10.1.9.6:2427--->

DLCX 81566 AALN/S0/SU0/0@uk-srst.vocera.local MGCP 0.1

C: A0000000027c74fa000000F5

I: 5

X: 0

S:

<---

Mar 17 17:39:08.681: MGCP Packet sent to 10.1.9.6:2427--->

250 81566 OK

P: PS=236, OS=37760, PR=238, OR=38080, PL=0, JI=60, LA=0

<---

uk-srst#no deb all

All possible debugging has been turned off

uk-srst#

3 REPLIES
Silver

Re: MGCP FXO outbound call deleted prematurely

CSCdt85876 - Admin status in sh mgcp endpoint up,with controller,voice port shut

Re: MGCP FXO outbound call deleted prematurely

This looks like this message is causing problems:

Mar 17 17:39:03.654: MGCP Packet sent to 10.1.9.6:2427--->

NTFY 119743623 aaln/S0/SU0/0@uk-srst.vocera.local MGCP 0.1

N: ca@10.1.9.6:2427

X: 0

O: H/oc

This is the RFC description:

Report on completion

The report on completion event is detected when the gateway was

asked to perform one or several signals of type TO on the

endpoint, and when these signals were completed without being

stopped by the detection of a requested event such as off-hook

transition or dialed digit. The completion report may carry as

parameter the name of the signal that came to the end of its live

time, as in:

-nick

New Member

Re: MGCP FXO outbound call deleted prematurely

Hi, Nick,

Thanks a lot for your response, what happened was that I was not aware that in remote office a separate access digit needed to be dialed for outbound calls. Once I added that digit in dial-pattern, it worked.

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