I got called in on this phone issue. THey have voip PBX box (positron) and SIP trunk lines.
they had put the pbx box on the DMZ and supposedly was hacked. Now their caller ID for outgoing calls says a totally wrong phone number.
I put the PBX box behind the firewall and set port forwarding as per positron's instructions.
caller id is still wrong.
positron says it's not them and we are waiting for a call back from the SIP provider. is it with them? something we shoudl be able to change by logging in to sip provider? or they need to correct it?
or is that controlled somewhere else?