逃生口网关PSTN Bypass Gateways

HT PSTN系列 是一款专门设计的宽带路由器加1、2、4 FXS 口和1、1、2、4 个逃生口（PSTN）VoIP 网络电话网关，它具有价格低、稳定、安装简单、功能丰富等优点。是宽带IP 电话接入商、系统集成商、网吧、话吧等宽带IP 应用的首选设备。HT-544 在一个软件内分别能配置成H.323 或者SIP 两种协议，该网关的特点是可正常接听普通电话，且可以自如的选择使用VOIP 或是 PSTN。突发情况下不能使用VOIP 时，可跳转到PSTN 线路。 PSTN Bypass Gateways FXS with Bypass Gateways have the function to escape, and ordinary telephone line backup. This series gateways can meet need of H.323 and SIP systems for operators, and do not required to upgrade when convert SIP and H.323 protocol. The Gateways provide a standard 24V FXS phone interface complies with the ITU Telecommunications Standards, Can meet a variety of standard telephone and cordless phones. Regular telephone line backup port can be inbound and outbound, caller ID are forwarded directly to the phone. The gateway is set flexible, thin, light and full-featured, low temperature, and good sound quality HT-812P (1-FXS Port with a PSTN Bypass Port) Support dual protocols: ITU-H.323 V4 and IETF SIP V2 Provide 1 RJ-11 port for a POTS phones or a PBX's trunk line Provide 2 RJ-45 Ethernet Ports Provide 1 RJ-11 port for PSTN Life Line (Bypass only) Support single or multiple registrations Support call forward/transfer/hold, phone book Support G.711 A/μ law, G.729A/B, G.723.1 Codecs Support QoS, NAT transversal and router function Support VAD, CNG, EC HT-822P (2-FXS Port with a PSTN Bypass Port) Support dual protocols: ITU-H.323 V4 and IETF SIP V2 Provide 2 RJ-11 port for POTS phones or a PBX's trunk line Provide 2 RJ-45 Ethernet Ports Provide 1 RJ-11 port for PSTN Life Line (Bypass only) Support single or multiple registrations Support hunt line, call forward/transfer/hold, phone book Support G.711 A/μ law, G.729A/B, G.723.1 Codecs Support QoS, NAT transversal and router function Support VAD, CNG, EC HT-522 (2-FXS Port with 2-PSTN Bypass Port) Support dual protocols: ITU-H.323 V4 and IETF SIP V2 Provide 2 RJ-11 port for a POTS phone or PBX's trunk lines Provide 2 RJ-45 Ethernet Ports Provide 2 RJ-11 port for PSTN Life Line (Bypass only) Support call forward/transfer/hold, phone book Support G.711 A/μ law, G.729A/B, G.723.1 Codecs Support QoS, NAT transversal and router function Support VAD, CNG, EC HT-544 (4-FXS Port with 4-PSTN Bypass Port) Support dual protocols: ITU-H.323 V4 and IETF SIP V2 Provide 4 RJ-11 port for POTS phone or PBX's trunk lines Provide 2 RJ-45 Ethernet Ports Provide 4 RJ-11 port for PSTN Life Line (Bypass only) Support call forward/transfer/hold, phone book Support G.711 A/μ law, G.729A/B, G.723.1 Codecs Support QoS, NAT transversal and router function Support VAD, CNG, EC DBL TECHNOLOGY LIMITED Room 5C,Aozhihao Integrated Building, Xinzhou 4th Street, Futian District,Shenzhen City,Guangdong,China Zip Code:518048 Contact Person: Mr. Bai Mobile:13,480,967,003 MSN: bxh_111@hotmail.com Skype:adonis.bai TradeManager:cn220087026 QQ: 424357833/1114953360 Email:bxh@dbltek.com