Skype to SIP

[Steve]

Hi everyone,

I have a SIP-based VoIP service through draytel.org, and I want to be able to make/receive calls with Skype, without using conventional telephone numbers.

So I need a piece of software that'll bridge between Skype and SIP.

I have a PC running all the time - it's Linux based (Ubuntu Feisty Fawn).

My VoIP phone is connected directly to my router, and has a SIP address.

What options do I have?

Cheers,
Steve.

[TiG]

Asterisk will do it.

I've got this page bookmarked from a year or more ago.
Skype-to-Asterisk(SIP): Progress - Part 1

Though i have to say that my view is that Skype won't take things lying down if they realise what you are doing.

TiG

[Steve]

Still looks to me like you need an app running alongside the Windows version of Skype. Or maybe I've misunderstood.

[TiG]

Quite possibly, I never actually followed the steps to completion as i personally think that Skype is going to die sooner or later, in the SIP world that I work its days are numbered, too many things will be running open sourced sip for SKYPE to live in a closed loop network.

TiG

[peterb]

I'm not sure what it is you want to do. You can download the Skype software for Linux and make Skype calls that way, but only using Skype out. As Skype uses proprietary protocols, unlike SIP which is open, you cannot use the Skype software to make calls over SIP. Most of the SIP providers have brdges so you can call other SIP prioviders free - skype does not so you either use skype to call other Skype users, ar SIP to call other SIP users. The Asterisk solution may work although it could be tricky to set up. Really you are effectively needing to decode the skype audio, and reencode it to a SIP supported protocal, while translating the signalling protocols from one to the other. The difficulty lies in decoding the Skype protocols.

As a crude analogy, think about using Linux to read/write NTFS files. It has eventually been done, but only because many people in the open source community have reversed engineered NTFS - that has not been done with Skype AFAIK.