First, we are running 4.5.0.1090 Epsilon Geminids (CentOS32), however, this problem was there on the previous version. We use shared lines, two trunk groups with the failover option set to "on all error codes". We use snom 3xx phones. If you use the speed dial or redial key, the snomONE first tries the prime line, gets a fail message, then sends the call on the second line. However, if you pickup the handset and start dialing, the prime line is selected, when the snomONE gets a failure, instead of re trying on the second trunk, it drops the call. We are running the latest version of the snom software, testing with a snom 370 (snom370-SIP 8.4.35 ).
Any help or thoughts would be greatly appreciated.