CSCsl74701 Bug Details

May 21, 2010 in Blog, CCIE Voice with 2 Comments

I got burned by this bug last night.  Read up on it and be aware of what you might run into with CUCM 7.0(1) on the lab!

CSCsl74701 Bug Details
ARQ requests 1280 when no regions are defined to use g711

Symptom:
ARQ sent to gatekeeper requests bandwidth for a g711 call (1280) even though only g729 is configured in all of the regions.

Conditions:
In a call routed to a GK controlled ICT and all regions are configured for g729, the originating CCM requests 160 in the ARQ to the gatekeeper. When the h225 setup arrives at the terminating CCM, an ARQ is sent to the gatekeeper requesting 1280. This is because the IntraAudioRegionDefault and InterAudioRegionDefault service paramater settings are included in the calculation for the maximum bandwidth request. Callmanager default setting for IntraAudioRegionDefault is g711.

It should check region pair before applying default if there is nothing matched.

Workaround:
Set both service parameters to g729, or increase zone bandwidth setting on the gatekeeper

About Matthew Berry: Husband to @ElisabethBerry, father of two awesome boys, amateur theologian, sporadic blogger, coffee snob, Senior UC Engineer @ CDW - My tweets are my own!

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2 Responses to “CSCsl74701 Bug Details”

  1. voice3v January 8, 2011 at 11:44 am #

    Got stuck on this one, found the below discussion from OSL useful:
    http://www.mail-archive.com/ccie_voice@onlinestudylist.com/msg12690.html

    Calls work and shows G.729, but show gatekeeper calls displays 128kbps.

  2. adam October 15, 2011 at 1:10 pm #

    Dont we have to set BRQ enabled —>TRUE in service parameters apart from this to fix this bug