This might be related to the Cseq problem described a while ago here. Try doing a nanual fix to sofia_presence.c (search for the thread) or uograde to 1.4.8;
Did the problems start about 2 weeks ago? If so - it is probably related to this.

                   Regards, __Yehavi:

2014-09-22 20:09 GMT+03:00 Cj B <chris@cjbonline.org>:
Hello list,

I have a Cisco 525G and 504G both with side cars. They were working fine for a while (green lights, flash when ringing, etc) and then all of a sudden they are now just blinking orange constantly. I haven't upgraded freeswitch (1.4.6+git~20140603T193516Z~9479729340~32bit). 

The sidecar still seems to work, I can transfer to other lines, I can dial them, but the lights just stay flashing orange. Here's a packet capture: http://pastebin.com/vDreS2bm

Does anyone know what could cause this?

Thanks for any help!

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