Our company is migrating from RingCentral to 3CX, RingCentral is great and I recommend it for anyone not wanting their own PBX. With RingCentrl the following is transperent to the caller, with 3CX is not. 1. Caller calls 123-123-1234 2. The auto attendant waits for caller to push keypad #1 3. The PBX rings external 555-555-5555, no answer after 4 rings (not seconds btw) a) the PBX now trys extension 555-222-222, no answer after 3 rings (the ring count is configurable, this is important because some phones that our employes have might go to their personal voicemail sooner than others no one wants a customer hearing a personal voicemail) b) the PBX now trys calling one more time some other number c) the PBX now plays "All reps are busy, please leave a message" and records their message. In the above if anyone does answer the call they will hear a "To accept this call press 1" this way they know it is not their wife that is calling, but a customer. The ENTIRE time the caller only hears music... Using 3CX to accomplish the above is not obvious. The closest you can get is... 1. 3CX trys the extension, and if not answered after x seconds... 2. The 3CX extension forwarding rules kick in, the first rule is "Offer option to Confirm accept " to which 3CX tells the caller "finding them" or something, very annoying, how to turn that off?! 3. The next rule kicks in and it is only given x seconds to ring, all rules are, and the number quickly goes to personal voicemail, which is answered so 3CX never gets to tell the caller all reps are busy! After typing all the above it seems that dummy extensions is maybe the answer???? But we are calling external numbers, not extensions.