Downgrade 3cx v15 sp4 to sp3

[choimarc]

Hello,

I think the latest sp4 update has broken my multiple sip trunks. I would like to downgrade to sp3. How do I do that ? The real question is where can I download a 3cx v15 sp3 installation file ?

 

[eagle2]

Install an image of 3CXPhoneSystem15.exe with SP3, if you have kept one, otherwise send me a PM to send you a copy, and restore a backup you might have kept of your configuration with SP3. Downgrade of configuration from a SP4 backup may not work

 

[YiannisH_3CX]

Hello @choimarc

Could you tell us a bit more about your configuration and what the issue is? maybe there is an easier solution rather than un-installing and re-installing

 

[choimarc]

Hello,

My issue is described in this post:

https://www.3cx.com/community/threads/generic-sip-trunk-invite-issue.47571/

Thanks.

Marco.