... and IP network. Function:·Signalling support: -SS7 (ITU-T Q.700 series), 24 bits/14 bits PC, ISUP ... /TUP; -ISDN-PRI (ITU-T Q.931, Q.921); -V5.2 (ITU-T G.964, G.965);·VoIP protocol ... support: -SIP (RFC3261M RFC3362(T.38), RFC2833(DTMF)), RTP/RTCP; -Codec:G.711u- ... Channels;-64 G.723, G.726, G.729 Channels;-32 T.38 Fax Channels, 64 Conference Bridge; Physical Specification: ...