How Caller ID for outbound calls can be specified?

First of all, you can specify Caller ID if it was previously verified or if it’s a number you got from VoxImplant. There are two ways to verify custom Caller ID: using Control Panel -> Settings -> CallerIDs or using VerifyCallerID method of HTTP API. Caller ID can be specified in VoxEngine scenario in callPSTN function as 2nd parameter.