I'd like to set up VG224 to support analog phones, modems, and fax machines with extensions on DID blocks. I've followed Cisco's SCCP Controlled Analog (FXS) Ports doc, and have successfully configured a voice port for an analog phone. However, the same config doesn't work when attaching fax machine. Fax machines generally transmit/receive faxes to/from external parties, not over IP WAN.
Recent posts recommend MGCP over SCCP but suggested configs may not work in my environment. I have a PRI terminating on a Catalyst WS-X6608-T1 module. CallManager 4.1(3)SR4d in single cluster, VG224 running 12.4(2)T5, configured in CCM as SCCP gateway with all 24 endpoints as analog phones.