72 FXS/FXO SIP VoIP Gateway Certified by Mitel Canada SIP & MGCP CDR, Routing, DID, MWI ... mode Voice Codec: G.711, G.729A, G.723.1, GSM, iLBC Echo Cancellation: G.168; Tail Length: 64 milliseconds Dynamic ... have two number for incoming calls ( PSTN and extension) The gateway can be configured and controlled by multiple soft switches Can ... Weight:9Kg, Gross weight 14 Kg VOPTech 72 Port SIP VoIP Gateway