SPA525G2 not registering on UC540

Unanswered Question
Aug 2nd, 2012
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I have a problem with a SPA525G2. It doesn't register on the UC540 if its IP is from another range than the UC540. on the phone

ex: spa525 (10.10)----Router-----Unity (20.1).

if the phone is plugged directly into the unity, it works without problems.


SPA525 Firmware: 7.5.2a


CME: 8.6



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paolo bevilacqua Fri, 08/03/2012 - 09:53
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Maybe you need to configure option 150 in DHCp at the remote relocation.

Note: UC500 is not Unity.

Cristian Iconaru Sat, 08/04/2012 - 22:56
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Hi Paolo,

150 is configured, the phone gets the SEP file but then remains in connecting...and nothing happens.

if I turn on the VPN, it works without problems.


janickle Sun, 08/05/2012 - 00:06
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Hi Cristian,

Is the SPA525 local to the UC or is it a remote phone?

Thank you,

Jason Nickle

Cristian Iconaru Sun, 08/05/2012 - 23:14
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Hi Jason,

yes, it's a simple lab setup.

spa525 --- router --- uc540