... , ISDN PRI, G.711, G.729A MX100-TG Trunking voip Gateway With up to 4 E1/T1 digital trunks, MX100-TG series Digital ... Media Gateway supports varieties of protocols and codecs, including SIP, ISDN PRI, G.711, G.729A, G.723, iLBC, GSM, and ... G.168, T.30, and T.38. It connects E1/T1-based PBX and PSTN to IP telephony ...