There's no limits per se on these. The limitations will be hardware resources and the number of digits per ext number. 5 gives much more numbers than 3 for example.
Yea, and in this case you would go 4 or 5 digits extension numbers.
Ok ! So if i have a customer with 1200 extensions and i want to set up 500 Call Queues, with each one 30 agents, this only a material ressources concern.
Sure, this page is bookmarked since we are 3CX's partnerI strongly recommend you also review our hardware requirements found her: https://www.3cx.com/docs/recommended-hardware-specifications-for-3cx/
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