... , T.30, and T.38. It connects E1/T1-based PBX and PSTN to IP telephony networks. It is packaged in ... 1U chassis.Applications- PSTN-SIP digital trunking gateway- Interconnecting legacy PBX to IP-based voice networkModelE1/T1MX100-TG-1E11MX100-TG-2E12MX100 ...