Ejointech acom504g-4ports gsm-voip gateway
number of gsm channels (max): 4 (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)
ejointech acom504g-4 voip gateway is a high-performance, multi-functional device that supports up to 4 concurrent calls. it is designed for a variety of applications, including voip termination, call routing, pbx integration, mobile voip, conference calling, voicemail, ivr, and fax over ip,also support sms function. the acom504g is ideal for connecting ip phones, soft switches, and ip-pbx’s to gsm network, and is the best fallback solution for landline outages.