Ring Groups limit on ringall FreePBX 13

[GrandStreamUser (AndyGarsya)]

What is the maximum number of extensions that can be added to Extension List (Ring Groups) so that they ring “ringall”?

[Tgon]

[Solved] Ring group, can't add extensions after 64 (limit=255 chars max)

I have created a ring group to forward incoming calls to all phones when secretary has left the office. Secretary leaves and activates a forward to the ring group. It works as expected. When trying to add new extensions for new people, (I have already 64 extensions in the list) typing a number in the extension list or selecting with extension quick pick, no new number is added. After “Submit change” the list is unchanged. Am I missing some limit ? or do I have to add in a different way (fil…

The official answer is 255 characters worth of extensions