8 feb. 2022 kl. 17:51 skrev Alex Balashov <abalashov@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@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@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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