I know it is possible, but I was wondering what is the limit if I have an extension, let's say 3333 that is on multiple phones in position 1 on each phone, ie let's say 6 phones. If all phones are picked up and 6 differnet people using 3333 make external calls, will this work, what is the limit, and how do you set that? Is is global or line/phone/device base, etc.
No worries my friend
I would always assign something to Line 1. It doesn't have to be a DID number
just pick a new range that falls outside your current dial plan. This new range
can be used as "Phantom" numbers for setups like this or perhaps phones that
don't need to be reached from the outside world. If all your DID's are in the 3000 to 3599
range, then maybe you could use 44xx for "Phantom" numbers.
This really helps to identify the phones when troubleshooting etc. The users can report
via the Line 1 number and not have to reference the mac.