Voice Over Internet Protocol (VOIP 101)
29 Jul 2008, 4:58 pmVoice Over Internet Protocol: The ability to move voice traffic over data encoded packets on an IP Network rather than over a traditional copper telephone network.
There are two kinds of VOIP.
Private Switched and Public Switched.
Privatley switched VOIP allows a business to connect to their other business which could be in another area of the city, state, country or overseas utilising a private LAN connection connected at each of the sites.
A typical scenario is where a person will pick up their phone and ring the internal extension of the party they wish to ring. Lets assume that party is in China. The handset sends a signal to the main PABX switch box and then that box interprets the call as an internal-external call. It’s instructions will be simple. Rather than sending the call over the outbound copper, the call is routed to a VOICE ROUTER installed at the switch. The router will pick up the call and place it over the network, and will terminate the call at the China site’s VOICE ROUTER. The VOICE ROUTER will then place the call in the PABX and ring the extension of the party desired. This will all take place in seconds.
Prublicly switched VOIP is more of your end user/business application.
The person will pick up their handset and dial the number of the person they wish to ring. The PABX will then process the call directly to the VOICE ROUTER and the call is put over the public internet to what is called a GATEWAY. The GATEWAY sees who the call is intended for, and routes the call to the nearest LOCAL GATEWAY the end number is destined for.
Once the call has reached the terminating gateway, it will open up a traditional PSTN line and put the call through.
All calls OUTSIDE of an internal network MUST TERMINATE on a PSTN circuit. VOIP providers avoid paying STD charges as the calls are not placed over the copper in the first instance.
For more information visit Arrowvoice VOIP Services
