MD110 E1 2811 MGCP only 1-15 timeslots work

Unanswered Question

Hi!


I have a strange problem with my Erisson MD 110 and CCM 4.3 & 2811 (MGCP). MD110 connected to 2811 (E1 QSIG), 2811 registered as MGCP gateway. I find out, that no voice in both direction, when calls occupied timeslots after 17.


sh voice call summary

PORT CODEC VAD VTSP STATE VPM STATE

============== ========= === ==================== ======================

0/0/0:15.1 - - -

0/0/0:15.2 - - -

0/0/0:15.3 - - -

0/0/0:15.4 - - -

0/0/0:15.5 - - -

................................

after

0/0/0:15.17 - - -

0/0/0:15.18 - - -

no voice in both direction


2811 config:


!

controller E1 0/0/0

pri-group timeslots 1-31 service mgcp

!

!

interface Serial0/0/0:15

no ip address

encapsulation hdlc

no logging event link-status

isdn switch-type primary-qsig

isdn incoming-voice voice

isdn bind-l3 ccm-manager

isdn send-alerting

isdn contiguous-bchan

isdn bchan-number-order ascending

isdn sending-complete

no cdp enable

!

!

mgcp

mgcp call-agent CCM1 2427 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 package-capability rtp-package

no mgcp package-capability res-package

mgcp package-capability sst-package

no mgcp package-capability fxr-package

mgcp package-capability pre-package

no mgcp timer receive-rtcp

mgcp sdp simple

mgcp fax t38 inhibit

no mgcp explicit hookstate

mgcp rtp payload-type g726r16 static

!

mgcp profile default

!


Somebody know how to fix problem with other 17-31 timeslots?

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iptuser55 Tue, 09/02/2008 - 01:32

Is the MD configured for all 30 channels, can teH GW support 30. Also I see you have isdn contiguous-bchan set maybe remove it

Ayodeji Okanlawon Tue, 09/02/2008 - 01:34

Hi,


You can do a sh diag ...this will telly ou how many dsps you have. May be you have PFDM2-16, which can only support 16 channels..

iptuser55 Tue, 09/02/2008 - 02:13

To check the configuration of the MD in that how many have tehy configured , you could if they have configured correctly ie. CCM uses top down, MD bottom down


Use DEBUG Q931 and ask the MD user to make a call = what does it come on - channel 31 ? ch 1 If it is ch 31, 30 , 29 etc then I guess the MD guy have configured it correctly with the correct number of channels

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