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PBX Voice Over IP (VOIP) is the next generation voice communication. Let GARLIC.COM show you VOIP. |
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Garlic.com > Business PBX Phone System>Hosted PBX Phone Plans |
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Order Business PBX Phone Service: 800-899-4125
Our PBX Phone Systems Offer:
Help Your Business Grow ... Click Here to Sign Up Now! About IP PBX phone systems or IP PBX are Internet Protocol Private Branch eXchange phone systems that feature a telephone switch that supports voice over IP (VoIP). IP PBXs convert IP phone calls into traditional circuit-switched TDM connections for the PSTN. They also support traditional analog and digital telephones, allowing enterprises to migrate slowly to an all-IP telephony environment or VOIP phone system. In addition, another type of PBX phone system available are WPBX Wireless Private Branch Exchange phone systems. IP telephony is a two-way transmission of voice over a packet-switched IP network, which is part of the TCP/IP protocol suite. The terms "IP telephony" and "voice over IP" (VoIP) are synonymous. However, the term VoIP is widely used for the actual services offered (see VoIP for more details), while IP telephony often refers to the technology behind it. In addition, IP telephony is an umbrella term for all real time applications over IP, including voice over instant messaging (IM) and videoconferencing. Starting in the late 1990s, the Internet and its TCP/IP protocol suite began to turn the data communications and telephone industry upside down. IP has become the universal transport for almost all data and video communications worldwide. It is increasingly becoming the infrastructure for voice traffic as well. Today, every communications carrier has built or is using an IP backbone for some or all of its voice services. In addition, large enterprises are either already using IP for some amount of internal voice traffic or have plans to implement it or create test beds. Data Over Voice Became Voice Over Data was first transmitted over telephone networks, starting in the 1960s, and by the late 1980s, data routinely traveled over digital voice circuits. By the 1990s, the majority of worldwide communications traffic had changed from voice to data, and as IP networks began to flourish, the economics of using IP for voice began to emerge. Although the backbone of the global telephone network had been converted to digital for some time, the circuit-switched nature of the public switched telephone network (PSTN) is wasteful. Even though one person talks and the other listens, both "to" and "from" channels are always dedicated. In addition, newer voice codecs cut the digital requirement from the traditional 64 Kbps (PCM) down to 8 Kbps with respectable quality. Thus, the bandwidth requirement for voice on an IP network is 1/16th that of the PSTN's dedicated, digital circuits. Varying Quality with free VOIP telephone service from PC to PC or between phones and PCs using the public Internet became popular, especially for international calls. Call quality over the Internet can be erratic because the Internet provides no guarantee of quality of service (QoS). However, when an organization has control over its network, quality can be excellent. Private enterprises with their own IP networks, as well as major telcos and IP telephony carriers that have developed IP backbones, can provide voice quality that competes with the traditional PSTN. PBX Phone System Transport and Signaling IP telephony uses two protocols: one for transport and another for signaling. Transport is provided by UDP over IP for voice packets and either UDP or TCP over IP for signals. Signaling commands that establish and terminate the call as well as provide special features such as call forwarding, call waiting and conference calling are defined in a signaling protocol such as H.323, SIP, MGCP or MEGACO (see IP telephony signaling protocol). The integration of packet-switched IP with the traditional SS7-based telephone system is a complex undertaking with numerous protocols competing for attention. PBX Phone System - Business PBX Phone Service Please call us at 1 800 899 4125 or email us e-mail us at office@garlic.com. GARLIC.COM offers VOIP in California and also offers the following services in the following cities: |
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