Cisco SPA2102-SF Administration Guide - Page 55

Configuring Voice Services Using a FAX Machine 4 • G.726-40 • G.729a • G.723 WRTP54G • G.711u (configured by default) • G.711a • G.726-32 • G.729a • G.723 Using a FAX Machine You can connect a fax machine to an FXS port on the SPA2102, SPA3102, SPA8000, and SPA8800. T.38 Fax is supported on these devices, for fax transmission over an IP network. The SPA2102 and SPA3102 support a single connection, while the SPA8000 and SPA8800 support one connection for each pair of FXS ports (1/2, 3/4, 5/6, and 7/8) for a maximum of four connections. Follow this procedure to optimize fax completion rates. STEP 1 Upgrade the ATA firmware to the latest version STEP 2 Ensure that you have enough bandwidth for uplink and downlink. • For G.711 fallback, it is recommend to have approximately 100Kbps. • For T.38, allocate at least 50 kbps. STEP 3 To optimize G.711 fallback fax completion rates, set the following on the Line tab of your ATA device: • Network Jitter Buffer: very high • Jitter buffer adjustment: disable • Call Waiting: no • 3 Way Calling: no Cisco Small Business ATA Administration Guide 55