Daniel-

Yes - anytime the LINE rings, it will have ring tone number 8

So the original incoming call has ring tone number 8, no beeps at all (and I assume these phones are set to No Ring, so they don't hear the initial incoming call, but that really doesn't matter)

Internal Intercom Calls will be ring tone number 1 plus a single beep.

Transfered Calls from the Automated Attendant will be one ring of ring tone 1 and a double beep, and then they will change to ring tone 8 and a double beep.

So, if the phones don't ring on the initial call, they will be able to hear the difference between intercom and blind transferred calls by the ring tone and not just the beeps.