We have a single SIP trunk with 8 channels available. I would like to "reserve" one of those channels for use with a specific extension (for outbound calls) or DID (for inbound calls). Extension 101 must always be able to call out, and receive calls. So, if 7 of our 8 channels are in-use, and extension 101 is not already involved in one of those calls, then no additional outbound calls from extensions other than 101 may occupy that last available channel no inbound calls to DIDs other than the DID configured for use with extension 101 should be accepted by the system Is this sort of configuration possible in 3cx v15.5? Thank you.