... groupVoice processingVoice codec: G.711,G.729A,G.723.1,GSM,iLBC Echo cancellation: G.168 with 64ms echo tailDynamic ... inbound and outboundFax processingT.30, T.38 fax relayDTMFRFC 2833, Signal, INBANDBilling CDR, polarity reverseUser featuresCaller ID, call forwarding, call ... Voipswitch Class 5 Soft switchl TG1800 E1 Trunk Gatewayl WG2000 GSM/CDMA Gatewayl EX1300 SME IP-PBXl EX3000 IP-PBXl Mobile ...