Cisco

CME 8.8 upgrade and Exchange UM voicemail problem

Brian Scheewe

20 Sep 2011 — 1 min read

We recently upgraded to the new Cisco CallManager Express (CME) version 8.8 so that we could try out the new 8945 phones for point to point video. Immediately after the upgrade Exchange no longer answered calls to voicemail or auto-attendants and instead gave us a busy signal. In reviewing the Exchange logs I found the following error:

The Unified Messaging server rejected an incoming call with the ID "2ACCC6EF-E2F911E0-9286A0ED-1857E3E@10.1.1.22". Reason: "The Unified Messaging server received "INVITE" request with an invalid SIP header "USER-AGENT" with value ""."

That seemed strange that the USER-AGENT field would be ". so I created a sip-profile and modified the header to be "CME" instead.

router(config)# router(config)#voice class sip-profiles 1 router(config)#request INVITE sip-header User-Agent modify "." "CME"

then I applied the profile under "voice service voip"

router(config)#voice service voip router(config)#sip router(config)#sip-profiles 1

Now the calls go through. Here is the entire SIP config:

voice service voip cti csta mode basic no cti shutdown allow-connections sip to sip no supplementary-service sip moved-temporarily no supplementary-service sip refer fax protocol t38 version 0 ls-redundancy 0 hs-redundancy 0 fallback none sip session transport tcp header-passing registrar server expires max 300 min 60 sip-profiles 1 ! voice class sip-profiles 1 request INVITE sip-header User-Agent modify "." "CME"

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