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Polycom IP450 - Dial from Missed Calls

Occasional Advisor

Polycom IP450 - Dial from Missed Calls

Hi All,


We are unable to successfully dial numbers from our missed calls, Received Calls, Placed Calls or speed dial on the above handset. We have tried using firmware 4.03 4.04 and 4.10.


When a number is selected from any of the above lists, the phone does try to make the call.sip: 0203xxxxxx is displayed on the LCD. Then eventually times out.


I have included a SIP log just in case... Any help will be very much appreciated.






         INVITE sip:01134166007;transport=udp SIP/2.0

         Via: SIP/2.0/UDP;branch=z9hG4bK9c655e8c46941F9F;received=

         Max-Forwards: 70

         Contact: <sip:441164244020@;transport=udp>

         To: <sip:01134166007>

         From: "4020" <>;tag=97EA806A-16495AB5

         Call-ID: 4246665e-78a35af9-41ccbc60@

         CSeq: 1 INVITE

         Accept-Language: en


         Content-Type: application/sdp

         Supported: 100rel, replaces

         User-Agent: PolycomSoundPointIP-SPIP_450-UA/

         Allow-Events: conference, talk, hold

         Content-Length: 294



Message 1 of 2
Polycom Employee & Community Manager

Re: Polycom IP450 - Dial from Missed Calls

Hello Synety,

welcome back to the Polycom Community.

If you have a look at your INVITE To: Field.


According to the RFC3261:


To: The To header field contains the address of record whose
           registration is to be created, queried, or modified.  The To
           header field and the Request-URI field typically differ, as
           the former contains a user name.  This address-of-record MUST
           be a SIP URI or SIPS URI.

You are just sending the number and not a full URI.


This maybe simply caused by a misconfiguration of the phone and the community FAQ holds enough details on what a minimal configuration should contain. You should also check the registration status of the phone.


For further support please contact your Polycom reseller and / or Polycom support directly.

Best Regards

Steffen Baier

Polycom Global Services

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Message 2 of 2