VoIP
T38 FAX Cisco SPA122 Configuration
T38 FAX. Cisco SPA122 Configuration How to enable T38 FAX support on Cisco SPA122 VoIP adapters. Proxy and Registration In “Proxy and Registration” and “Subscriber Information” fill Proxy: YourSIP.Server User ID: SIP Username Password: SIP Password NAT Settings Goto Voice –> Line 1 or Line 2 depending your lines