How to leave a conference call without ending the whole call session?

[tango999]

Hi, I am new to this forum, hopefully it is OK to post my question here.

We just migrated to Mitel system and most users use 5312 system.

I tried to do a conference call within the company by:
- calling person A and establish the phone call
- press the little 'people' button (the conference call button), then dial person B's number
- now 3 parties are in the conference, me, person A, person B
- person B hangs up. This causes the whole call session to end.

I'd expect that when person B leaves the call, the call between person A and me remains.

So what's the trick to do the conference call 'properly'? I am really puzzled... Any help is appreciated. many thx

[NTEDave]

On a Mitel 5000 the people button is the transfer key.

Is your phone system definitely a Mitel 5000?

[DND ON]

Press CONFERENCE, then HOLD. Your conference call is split back into separate calls, just like they were prior to joining them.

Drop Call B, and go back into Call A.