I have a customer with Spectrum SIP trunks and they have a DID they want to use as for their analog fax machine. Is there a way to setup the analog fax machine to send and receive faxes on the SIP trunk DID? How would I get the outbound SIP DID to Analog line for the outbound faxing? Is there hardware that would take the SIP DID and convert it to analog line for the fax or is there another way of doing this? I have set up 3CX inbound faxing over SIP DID but that doesn't always work either. Any thoughts would be helpful.