VoIP blog 6: The call center and the phone call

Posted on Wednesday, June 6, 2018

Does VoIP use a call center?

VoIP is the call center itself, but in the cloud. Using VoIP saves money because your company can grow without receiving never ending accumulating invoices from the call center. But what’s happening behind the VoIP ‘scenes’?


All we see is just the phone that’s on our desk. We use it to make phone calls and to receive them, but how does it actually work? A VoIP call center consists one or more SIP-/ VoIP-phones that are connected to the internet with a cable and also a router and a VoIP gateway.


The phones are registered at the server which makes a connection when you receive an incoming or outgoing call. All phones with the same SIP-/ VoIP-address are saved in the server which makes also transferring and forwarding of calls, over the VoIP gateway, possible.


The IP PBX server, VoIP gateway and the router are then all connected to the core network. Therefore it’s possible to communicate with different devices at once.


How does a VoIP phone call work?

Transferring and forwarding calls are functions that belong to the VoIP gateway. When calling someone you pick up the phone which causes a signal. This signal will be sent to the VoIP gateway and it will make you hear a tone that reassures you there’s connection. From that moment you can start to type the number you want to call. This number will be saved in the gateway - that checks the number - temporarily.


What’s the phone number checked for? It will be checked to see if the size is valid and if it is, the gateway translates the number to the IP-address of the other device - the one you call to -, the IP host.


What’s the IP host? This is the gateway that’s connected to the phone system that you are calling to. A session has been set up between your gateway and the IP host of the other party. At that point, both parties can exchange data packages in which your voice is converted to travel over the network. When the conversation is terminated, the circuit between your line and the gateway will close too. The gateway sends a signal to the IP host which closes the complete session.


Would you like a consultation about how Comsave can provide a suitable VoIP solution for your company? Call us at +31(0)88 999 5555 or send an email to sales@comsave.com and we will contact you.


More about VoIP:

- VoIP blog 1: What's VoIP?

- VoIP blog 2: VoIP, better than Skype?

- VoIP blog 3: The benefits of VoIP

- VoIP blog 4: VoIP in the work environment

- VoIP blog 5: The technique and how is it installed?

- VoIP blog 7: Different platforms; 3CX

- VoIP blog 8: Different platforms; Xelion

- VoIP blog 9: Your VoIP by Comsave, what to expect?


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