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426

answers:

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How do VoIP services, such as Skype and Yahoo, connect to landlines?

We have a server connected to a landline using asterisk, so I'm thinking this server will bridge our VoIP conversation and connect it to a landline.

But if this is the case, wouldn't Skype need a lot of servers placed around the whole world just to connect to landlines?

+2  A: 

Yep. That's how telephony works. It's unlikely that Skype runs a bunch of servers themselves - they probably license the right to use a commercial telephony service, probably through the backbone carriers (just speculating).

Ben Collins
Oh ya.. That doesn't occur to me. The carrier has some agreements with skype or yahoo so they don't need to put the server all around the world.Thanks!
henry
A: 

Yes, to call somebody using landlines with VoIP, you need a server somewhere that is connected to the landlines.

Zifre