SIP protocol ot support for IP PBX Products - Voip PBX Services - PABX Service
IP PBX (telephone exchange network) in the past 20 years developing a product, the industry that has experienced three generations of its evolution, first and second due to its technical weaknesses, the market has not been fully accepted. With the global spread of broadband networks and the standardization of IP phones, IP PBX third generation came into being, which integrates voice, fax, data and video communications and other functions, the traditional PBX is not only a great threat and will gradually replace the former and become the leader in this field. The third generation of IP PBX based on the unified transfer protocol such as H.323, as well as the newer SIP protocol. Which, IETF's SIP protocol organizations to develop more than in H.323 scalability, openness has advantages.The United States since 2002 Zultys Technologies launched the first enterprise communications "media exchange" MX1200 since (Annex 6), the following companies have launched to support the SIP protocol switch media: Beijing Chol ZSwitch series of information technology (Annex 4 ), Taiwan Network FONEMOSA 4400 Series Titanium Technology (Annex 5), Zultys MX250 (Annex 7,2003 years), 3Com NBX (Annex 8), Cisco CallManager 4.0 (Annex 9), the United States Brekeke company OnDO PBX (Annex 10) . In addition, the following companies are research and development agreement to support the SIP media switches: Light and Power Company Limited technical PBmax-132 (Annex 2), Taipei peak IP PBX (Annex 3). Most of the above-mentioned IP PBX products (to be) the use of low-speed voice compression algorithms such as G.723/G.729/G.711, such as echo cancellation agreement G.165/G.168, Call Control Protocol SIP, communication interface 10/100Base-T . They have conference calls, video communications, wireless interface and other functions. Can be seen to support the SIP protocol, low-speed voice coding agreement in support of video communications, wireless communications IP PBX is one of the development.
These products are as follows:
According to the company's Web site reported power technology and its products PBmax-132 voice compression G.723/G.729 agreement, the use of echo cancellation G.165/G.168 25ms, Call Control Protocol H.323, SIP (under development), the use of 10/100Mbps LAN ports, features include: support for Web configuration and management, intelligent control procedures provide reliable and zero errors in system monitoring and reporting functions, voice mail, automatic transfer, etc. (Annex 2).
According to the Taiwan company reported net Titanium, Titanium Science and Technology Network FONEMOSA 4400 Series IP-PBX product specifications, proprietary call control protocol call control protocol, SIP, voice compression protocol G.711/G.729AB, echo cancellation using G.165 / G. 168 16ms, 10/100Base-T interface (Annex 5).
According to the United States Zultys Technologies Products was informed that in 2002 the company introduced MX1200, the world's first enterprise communications needs for tailor-made "media exchange", it voice, fax, data and video exchange and other functions integrated into a chassis. The use of high-speed CPU and digital signal processor (DSP), users simply choose the SIP-based telephone user interface or program, you can communicate through the MX1200. 25-1200 users MX1200 support to support the SIP protocol (Annex 6).
In 2003, Zultys introduced a lower price, the products can be extended-MX250. MX250 codec used G.711/G.729 agreement, 5-250 user support, support for SIP protocol (Annex 7).
3Com Corporation, according to the official website reported, 3Com has the following advantages: One, two networks (based on Ethernet and TCP / IP technology, voice network and data network integration), open (H.323, 3102 and 3101 phones support the SIP ), a powerful system (integrated unified messaging, voice mail, conference calling and other standard equipment, and expansion of more integrated voice and data applications), 3Com NBX products are divided into two series: NBX100 and SS3 NBX, NBX100 is currently the most support 200 devices, SS3 NBX device supports up to 1500 (Annex 8).
China Computer 2004-10-18 published in several newspapers, introduced to support the SIP protocol IP PBX products, which, Cisco CallManager 4.0 support SIP-IP PBX product, the product highlights include video phone calls, voice traffic encryption, as well as telephone support for secure authentication. SIP-based Zultys products MX250 IP PBX is a medium-sized IP PBX, it supports SIP-based real-time news, in addition to traditional telephone, fax, call control, as well as the backbone of the public switched telecommunications network, etc. (Annex 9).
U.S. Brekeke's OnDO PBX is a software-based IP-PBX, using SIP protocol. Features include voice mail, call forwarding, etc. (Annex 10).
