... .711/G.723/G.729 codec calls and T.38/Pass-through Fax). TG1800 supports Intelligent Multiple Trunk Routing technology, makes ... functions are supported for VoIP business operation, such as Call through, Call back, Calling card, Call shop, Call center, Fax ... ModeRFC2833, SIP INFO and INBANDFAX over IPT.38/T.30/pass through, Baud rate:14.4kbpsTrunk FeaturesSetting length of phone numberSupportedTDM ...