VoIP FAQS Fallback
From wiki.IPBRICK.COM
In which situation is a fallback of a call performed on IPBRICK?
A fallback happens when you have more than one telephony line configured on IPBRICK and your default line fails when your attempting to make a call.
Possible reasons for the execution of a fallback and IPBRICK's respective answers:
- Fail on the default service: SERVICE UNAVAILABLE;
- Busy channels: CONGESTION;
- Fail on the answer to sipsak: ping SIP (which we perform before sending the call).
