... , for full load voice processing to support CODEC (G.711, G.729A, G.723,iLBC,GSM), echo cancellation (G.168), DTMF relay (RFC2833), ... Lucent, Alcatcl, Siemens, Huawei, ZTE and others. It also supports network-side ISDN connections to ISDN PBXs and supports features such ... 4T1 (96 Channels)· Voice ProcessingVoice Codec: G.711, G.729A, G.723.1, GSM, iLBCEcho Cancellation: G.168, tail length: 8/16/32/ ...