SPA-525 Registration Issue

Unanswered Question
Oct 21st, 2009

I have a new SPA-525 that is not registering to our UC500 from a remote worker site.  Currently, I have it wired to a SR520.  Phone keeps saying downloading XML files and it cycles through several other downloading prompts.  Here is my SR520 config.  I have verified that the UC520 has the correct phone loads and also verified the tcp adjustment on my dialer interface.  I have a 524 that registers just fine with the same setup.  I have also verified the TFTP server setup on the 525, it just won't register.  Any suggestions would be appreciated.

I have this problem too.
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klogata Wed, 10/21/2009 - 08:56


In the Settings > Device Administration > Call Control Settings menu, is the Signaling Protocol set to SCCP and "Auto Detect SCCP" checked?


Steven Smith Wed, 10/21/2009 - 15:17

Is the 524 on the same site?  What version of IOS are you running on the SR520?

rowseyba1 Wed, 10/21/2009 - 16:45

The 524 is at the same site.  I am running 12.4(22)T on the SR520.

rowseyba1 Wed, 10/28/2009 - 09:46

Ok, I finally figured it out.  On my SR520 DHCP pool I did not have the option 150 pointing to the ip address of the CME on the UC520.  This allowed the phone to register almost immediately.

Patrick Born Wed, 10/28/2009 - 15:34

Great tip. Thanks for sharing this with the community rowseyba1.





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