[asterisk-users] Cisco SPA303 won't ring for more than 60 seconds

[jg]

At first I also thought this might be a phone setting. But then I found the same 60s to be true 
for a variety of SIP phones (Snom, Cisco, ...), despite the 300s timeout value in the Dial cmd. 
So it is likely to be Asterisk. The Asterisk Admin Guide says that the default value is 136 
years, so there must be something that sets this timeout value.

jg