Telephone Voip

Jan 16
2007
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Telephone Voip

The Voip Co Guide to SIP Trunking. What SIP Trunking can do for your Business

The Voip Co  SIP (Session Initiation Protocol) trunk is a service that allows businesses with a Hosted PBX or an installed PBX to use real-time communications including VoIP. By connecting an SIP trunk to an internal traditional PSTN (public switched telephone network) Phone System, companies can communicate over IP outside the enterprise. What's more, companies can replace traditional fixed PSTN lines with an IP phone system connected externally through an SIP-trunking service, thereby creating a single conduit for multimedia components including voice, video and data. As a result, an Business VoIP solutions.

How SIP Trunking Works
SIP trunking blends connections for both data and voice into a single line. By serving as a converter between a legacy phone system and a company's Internet connection, an SIP-trunking device allows the data network to carry voice traffic. SIP-trunking features typically include local and long-Distance Calling, E911, directory listing and caller ID, all of which integrate into a company's existing phone system.

Here's a hypothetical example of how SIP trunking works: A San Francisco-based sales representative places a long-distance call to a client based in New York City using a dialing prefix and the local-area phone number. The call either originates as an IP call or is converted to one before it leaves the office and then travels the majority of the way over the IP network of the service provider, then drops back down to the PSTN once it reaches its termination point. Since a sizable portion of the call traveled over the IP network at no additional cost rather than on the PSTN, the service provider can (and does) charge a mere fraction of what the traditional fee would be without the IP connection.

SIP trunkingconsists of three primary components. These include:

IP PBX: An IP-based PBX communicates with all endpoints over an IP network. It also switches calls between VoIP users on local lines while allowing all users to share a number of external phone lines. The typical IP PBX can additionally switch calls between a VoIP user and a traditional-telephone user, or between two traditional-telephone users in the same way that a conventional PBX does.

The Voip Co is an ITSP (Internet telephony service provider): The role of an ITSP is to ensure connectivity to the PSTN from an IP network for mobile and fixed communication devices. It also transports IP communications across a private IP network or public Internet.

Border element: The border element facilitates connectivity between an enterprise IP network, the PSTN and an external IP-carrier network. The border element may be an SIP-capable firewall or a SIP-enabling edge device connected to the firewall, or it can be a switch to transfer calls into and out of the PSTN. Border elements are usually managed by the service provider.

Note that a service provider will typically include SIP trunking as an element of an IP-phone-system package; it will only be separated into hybrid solutions when there is a need to maintain some locations on a traditional TDM (time-division multiplexing) system, which will connect to the overall IP infrastructure through various border elements and an SIP-trunking service.

Benefits:
SIP-trunking service benefits companies by:

Although SIP-trunking service providers offer many options at varying costs, it is not uncommon for companies to realize instant cost savings from a relatively modest investment in SIP-based technology. Certainly, SIP requires purchasing services and products including an IP PBX, IP phones, soft clients and SIP-friendly firewalls, to name a few out-of-pocket expenses. But if deployed properly, The Voip Co SIP trunking can produce a healthy return on investments in less than six months.

Darren Fisch regional leader in Hosted PBX, Business VoIP and Virtual PBX.
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Written by admin in: Skype Devices | Tags: free, net telephone voip calls, phone, telephone, telephone voip, telephone voip free, telephone voip mac, telephone voip skype, telephony, voip

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