I have three branches in 2 states. Currently those branches are configured with SLRG, call routes through local SIP trunk. Customer wants to implement TEHO. I can do with route groups; how do i reflect the caller ID? Because ITSP only displays the caller id belongs the SIP trunk number range.
If you use remote gateway (or SIP trunk) to route the call to PSTN and there is no DDI number (of caller) associated with respective SIP trunk, you probably won't have any choice to alter the CLI and will have to rely on one of the DDI number associated with respective SIP trunk.