We use Broadvox SIP trunk with 3cx phone system 8. We just upgraded to phone system 9. The outbound caller ID has never worked on either version....it always displays "Unavailable" when making external calls through the Broadvox SIP trunk. We have the Outbound callerID configured for each extension in 3cx...but it doesn't work. Anyone know if this is an issue with 3cx config or Broadvox? Any suggestions much appreciated. Thanks.