VOPTech Document Four Channel’s GSM VoIP Gateway
Copyright@2009 VOPTel Technology Co., Ltd All Rights Reserved.
4
1 Product Introduction
1.1 General Information
A VoIP GSM Gateway enables direct routing between IP and GSM network without the use
of a FXO port or the PSTN network. With this device, the usage of VoIP is greatly
enhanced with significant savings on long distance and roaming charges.
1.2 Protocol
¾
TCP/IP V4 (IP V6 auto adapt)
¾
ITU-T H.323 V4 Standard
¾
H.2250 V4 Standard
¾
H.245 V7 Standard
¾
H.235 Standard
（
MD5
，
HMAC-SHA1
）
¾
ITU-T G.711 alaw/ulaw, G.729A, G.729AB, and G.723.1 Voice Codec
¾
RFC1889 Real Time Data Transmission
¾
Proprietary Firewall-Pass-Through Technology
¾
SIP V2.0 Standard
¾
Simple Traversal of UDP over NAT (STUN)
¾
Web-base Management
