When implementing Store and Forward Fax on a modem card, the off-ramp gateway does not necessarily need to have MMoIP dial peers configured to establish connectivity with the receiving fax device; therefore, off-ramp MMoIP dial peers are optional when using a modem card. You basically use off-ramp MMoIP dial peers if you need to specify a particular resolution for the fax transmission or if you need to define an encoding type. For example, it might suit your company's needs to send the fax-mail using the least definition as possible to save network resources. In that case, you might want to define a higher image resolution using an off-ramp MMoIP dial peer. Another case where you might want to use an MMoIP dial peer would be if the fax devices in your network could only process a particular type of encoding or compression. If you do decide to configure a MMoIP dial peer, be sure to match the incoming called number command value with the destination pattern telephone number you configured for the corresponding on-ramp POTS dial peer.
