48/72/96 FXO/FXS SIP VoIP Gateway with Mitel Certification SIP & MGCP Routing, DID, MWI, CDR CPU: Motorola & DSP: TI ... upgradeOther Special Feature FXS Loop Start, DDI (Hong Kong) SIP(RFC3261), MGCP (RFC2705) 3GPP TS 24.228,TS 24.229 ... In-Band: RFC2833,INFO (SIP)Signaling DTMF mode FXS port can have two number for ... ,19” Chassis Net Weight:9Kg, Gross weight 14 Kg SIP VoIP Gateway