[SR-Users] SEMS license with kamailio and rtpengine

[Alex Balashov]

Yes, you’re quite right. As I mentioned in my previous response, I was trying to keep the issue very simple for the OP, but perhaps I simplified too indulgently.

—
Sent from mobile, with due apologies for brevity and errors.

> On Feb 9, 2022, at 2:15 AM, Olle E. Johansson <oej at edvina.net> wrote:
> 
> 
> 
>> 8 feb. 2022 kl. 17:51 skrev Alex Balashov <abalashov at evaristesys.com>:
>> 
>> You do not need to purchase a licence to incorporate SEMS into a service platform to sell telephony to customers. You may not, however, sell SEMS per se.
>> 
> That’s wrong. You may sell GPL-licensed software. But if you changed the code, the GPL forces you to make the source of the code available to your customers under GPL, should they request it.
> 
> There are many boxes out there selling with Asterisk in it, with Asterisk still under GPL.
> 
> Only if you changed SEMS code and want to sell it under a non-GPL commercial license you will need to discuss licensing with the license holders.
> 
> /O
>> That’s the very, very simple version.
>> 
>> —
>> Sent from mobile, with due apologies for brevity and errors.
>> 
>>> On Feb 8, 2022, at 11:47 AM, Patrick Karton <patrickarton at hotmail.com> wrote:
>>> 
>>> 
>>> Hello im using kamailio and rtpengine to build a custom SBC.
>>> 
>>> i was using freeswitch as my b2bua but i noticed a lot of issues when cps and simultaneous increased so i tried sems and i have better results.
>>> 
>>> But i do not really understand sems license so i want to know if i can use it.
>>> 
>>> i read from sems github
>>> 
>>> "It is licensed under dual 
>>>  license terms, the GPL (v2+) and proprietary license. This
>>>  program is released under the GPL with the additional exemption
>>>  that compiling, linking, and/or using OpenSSL is allowed.
>>> 
>>>  For a license to use SEMS under non-GPL terms, please contact
>>>  FRAFOS GmbH at info at frafos.com"
>>> 
>>> so my question is if i want to use sems as b2bua with kamailio and rtpengine and make profit of it do i need to purchase a license each time i want to sell it to a customer ? 
>>> 
>>> 
>>> Thanks.
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