Fax Over IP - T.38 compliant Group 3 Fax Relay up to 14.4 kbps and auto switch to G.711 for fax pass-through. Fax Datapump V.17, V.21, V27ter, V29 for T.38 fax relay
Telephony Features - Caller ID display or block, call waiting, blind or attended transfer, call forward, do not disturb, 3-way conference, last call return, paging, message waiting indicator LED support and stutter tone, auto dial, flexible dial plan