[cisco-voip] Adding BLF to 7962 causes phone to deregister permanently

[Sechaba Mokoena]

Hi Wes,

This phone is registered at an SRST site. The router sits behind an Expand Accelerator. UCM is behind a firewall at the central site. It worked fine until I upgraded the firmware to version 9.1.1. I've downgraded to the previous firmware but the problem still persists.


Kind regards,

Sechaba Mokoena



On 26 Jan 2011, at 2:59 PM, Wes Sisk <wsisk at cisco.com> wrote:

> This sounds very much like what happens when you have a transit network device doing packet/protocol inspection that does not understand the messaging associated with those features.  Is there a NAT boundary, firewall doing inspection, or similar network device between this phone and the CM server?  Can you move the phone closer to the server to confirm it is not a network issue?
> 
> Regards,
> Wes
> 
> On 1/26/2011 7:23 AM, Sechaba Mokoena wrote:
>> 
>> Hi,
>> 
>> I've got a 7962 with one 7915 expansion module. When I change the phone button template on the phone to include BLFs, the phone deregisters and goes into SRST mode. I also lose Line 1 on the phone. The phone resgisters when the default phone button template is used. I'm using the lastest firmware for the phone and the expansion module. Has anyone encountered a similar problem.
>> 
>> Kind regards,
>> 
>> Sechaba Mokoena
>> 
>> _______________________________________________
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>> cisco-voip at puck.nether.net
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> 
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