Hi,

Thank you very much for the clarification. Our intention is to provide VOIP service and hence we need not expose our customized code to end users.

Regards,

Shankar

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Date: Wed, 11 Mar 2015 10:56:02 +0100

From: "Olle E. Johansson" <oej@edvina.net>

To: "Kamailio (SER) - Users Mailing List"

<sr-users@lists.sip-router.org>

Subject: Re: [SR-Users] Regd. Kamailio GPL

Message-ID: <DD23FDE1-C5DA-4D98-B20E-DE7173C4902F@edvina.net>

Content-Type: text/plain; charset=us-ascii

On 11 Mar 2015, at 10:13, Daniel Tryba <d.tryba@pocos.nl> wrote:

> On Tuesday 10 March 2015 14:52:22 Shankar wrote:

>> We are exploring kamailio source for use in our VOIP solution. This is the

>> first time we are looking at open source. We have few doubts in using

>> kamailio for providing our VOIP service. Under GPL any customization

>> (customization mainly with respect to interacting with our proprietary

>> applications e.g. Billing server) we do to kamailio also has to be provided

>> to the end user. Our doubt is whether we can procure commercial rights to

>> our customised code?

> You should really contact a lawyer specialised in IP to get good advice. But

> gnu.org points out that above assumption isn't always true:

> http://www.gnu.org/licenses/old-licenses/gpl-2.0-faq.html#GPLRequireSourcePostedPublic

> "The GPL does not require you to release your modified version. You are free

> to make modifications and use them privately, without ever releasing them.

> This applies to organizations (including companies), too; an organization can

> make a modified version and use it internally without ever releasing it

> outside the organization.

> But if you release the modified version to the public in some way, the GPL

> requires you to make the modified source code available to the program's

> users, under the GPL."

> So if you don't ship a binary to endusers, you don't have to release source

> (including modifications). It all depends on what you are supplying to your

> endusers (a service or a (complete) software product).

There is a big difference between GPLv2 and GPLv3 here.

For GPL2, providing services is not seen as distribution of the source, and the

commercial code can stay in the company. For GPLv3 it's different as far as I

understand.

Kamailio is GPLv2 and Siremis - the web interface by Asipto - is GPLv3.