the right way to make few phones to ring at the same time is to configure shared line on all phones, then when you'll dial the DN all phones will ring and the first one to pick up the phone will answer the call.
The problem with this is that this is not a group/broadcast call in the hunt group sense.
The first phone to answer a shared line appearance has control of that DN. Subsequent calls to that shared line (whilst the first call is still active) will only show on the same phone that first answered - i.e. as call waiting - the other phones do not ring.
CallManager really does need a proper station hunt group capability with group/broadcast calls, Ring-no-answer withdrawal etc.
This is now the biggest stumbling block for most of my customers.
There are some weaknesses in this area yes - but really - you can do what you want just fine.
Set up a main call number on each phone (3000 for instance) and the same virtual lines on each phone (1234, 1235, 1236). TURN OFF call waiting on all lines (except the last line if you want) and enable ring on all lines.
Set the FwdBSY and FwdNA on 3000 to 1234, on 1234 to 1235, and so on.
If a call comes in - it will ring on all phones at 3000 - when 3000 is busy it will ring on 1234, etc. Works fine for us... :-)
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