GSM Gateway 美思奇

a voip gsm gateway enablesdirect routing between ip and gsm network without the use of a fxoport or the pstn network. with this device, the usage of voip isgreatly enhanced with significant savings on long distance androaming charges.

øtcp/ip v4 (ip v6 autoadapt)

øitu-t h.323 v4 standard

øh.2250 v4 standard

øh.245 v7 standard

øh.235 standard（md5，hmac-sha1）

øitu-t g.711 alaw/ulaw, g.729a, g.729ab, andg.723.1 voice codec

ørfc1889 real time data transmission

øproprietary firewall-pass-throughtechnology

øsip v2.0 standard

øsimple traversal of udp over nat(stun)

øweb-base management

øppp over ethernet (pppoe)

øppp authentication protocol (pap)

øinternet control message protocol(icmp)

øtftp client

øhyper text transfer protocol (http)

ødynamic host configuration protocol(dhcp)

ødomain name system (dns)

øuser account authentication usingmd5

øout-band dtmf relay: rfc 2833 and sipinfo