I just upgraded two of the SPA509G phones on our system to formware version 7.4.9a. Now it seems that the phones are no longer honoring the Alert-Info SIP header and defaulting to the Classic-1 ring tone. This caused a minor revolt in the office so I tried backing the phones back to 7.4.7 and the phones no longer registered with the Asterisk server. I've been able to manually set the Simple-1 ring tone on the two phones, but the distinctive ring patterns that differentiate between internal and external calls isn't working since the phones seem to ignore the Alert-Info header. I'd sure appreciate some help resolving this before I get lynched.
Is it possible to successfully back the phones back down to the 7.4.7 firmware?
I've watched the network traffic with an analyzer and I can see that the Alert-Info header is being sent and the phones that weren't upgraded to 7.4.9 are still accepting the Alert-Info header and ringing as desired. I am using asterisk v126.96.36.199. Here is an exerpt from the dial plan that has been working until the firmware upgrade.
First, an internal call:
exten => 123,1,SIPAddHeader(Alert-Info: Simple-1)
exten => 123,n,Dial(SIP/phone-001,30,Tt)
exten => 123,n,Voicemail(123@default,su)
exten => 123,n,Hangup()
and, an external call:
exten => 100,1,SIPAddHeader(Alert-Info: Simple-2)
exten => 100,n,Dial(SIP/phone-001&SIP/phone-002&SIP/phone-003&SIP/phone-004,30,T)
exten => 100,n,VoiceMail(1@default,su)
exten => 100,n,Hangup()
Again, everything worked fine until the two phones I upgraded to firmware v7.4.9a seemed to stop paying attention to the Alert-Info SIP header.
Thanks for any help you can offer.