Hi,
It appears with the 7.4.9c firmware, the phone no longer honors an Alert-Info header to specify a distinctive ring.
As an example, sending Alert-Info: <n=Simple-1;w=2;c=1> does not play the Simple-1 ring tone, but will only play the default ring tone for the line.
This was also broken in 7.4.9a
Thanks.
-- James