16 Oct
2020
16 Oct
'20
9:32 a.m.
Hi. I have 3 external SIP trunks for making external calls, provided by SIP telephony carriers: SIP carrier1, SIP carrier2, SIP carrier3. If SIP carrier1 trunk is ready to making callings then the outboud calling outside of FS is making using the trunk, otherwise, for example, if the trunk state is unknown/invalid or disabled by carrier that is unavailable or already ringing/busy then attempting of calling will be made using SIP carrier2 and if the same situation with SIP carrier2 trunk then attempting of calling will be made using SIP carrier3 trunk and if SIP carrier3 trunk has state which do not allow the calling voice message to caller will be send back What is the best way to make the following schema ?