CCVP GWGK Quick Reference Sheets

Faxing

The same reasons for running voice over data are the same reasons for faxing over data. Although faxing probably does not take as long to complete as a phone conversation, expenses can be high for long-distance faxing. There are a few ways to get that important fax across a voice network. Each of them was developed for specific situations.

Cisco Fax Relay

This Cisco proprietary protocol was created to send faxes over a VoXX network. The DSP acts like a virtual fax machine, converts the signal back to its original form, and then sends it to the remote fax machine. To save bandwidth, it uses 9.6 kbps. A key point to know is why a fax cannot be treated like a normal call. When a fax comes into the GW, it cannot be treated like a normal voice ...