E1/T1 Gateway PSTN to IP 1 E1/T1 port to the Central Office (RJ45)
Ethernet 10BASE-T (RJ45) Telephony Voice Features Voice Coding
G.711, G.726 (16, 24, 32, 40 Kbps), G.729sNAT traversal (both
manually and STUN) VAD, CNG, G.168 echo cancellations Out-of-band
DTMF transport