Yeastar tg200 2 gsm gateway features and functions:
number of gsm channels (max): 2 (quad-band gsm/gprs850/900/1800/1900mhz; support external antenna)
protocol: sip (rfc3261), iax2
transport: udp
dtmf: rfc2833, sip info, in-band
codec: g.711 a/u-law, g.726, g.729 a, gsm, speex.
lan: 1 (10/100mbps)
network: dhcp server, vlan, firewall.
power supply: ac 100~240v/50~60hz (dc 12v, 1a)
size: 175x125x31m