> 8 feb. 2022 kl. 17:51 skrev Alex Balashov <[email protected]>:
> 
> 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 <[email protected]> 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 [email protected]"
>> 
>> 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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