ياستار جهاز لحمل 4 شرائح الجوال Yeastar TG400G IP 4GSM Giga Port Gateway

Specification
Number of GSM channels (Max): 4
Network type: 850/900/1800/1900MHz
Protocol: SIP (RFC3261), IAX2
Transport Protocol: UDP, TCP, TLS, SRTP
DTMF: RFC2833, SIP INFO, In-band
Codec: G.711 a/u-law, G.722, G.726, G.729a, GSM,
ADPCM, Speex
Echo Cancellation: ITU-T G.168 LEC