This looks good to me! Here a doc that confirms your config;
A shared ephone-dn has the following characteristics:
Appears on two different phones but uses the same ephone-dn and number.
Can make one call at a time and that call appears on both phones.
Should be used when you want the capability to answer or pick up a call at more than one phone.
Because these phones share the same ephone-dn, if the ephone-dn is connected to a call on one phone, that ephone-dn is unavailable for other calls on the second phone. If a call is placed on hold on one phone, it can be retrieved on the second phone. This is like having a single-line phone in your house with multiple extensions. You can answer the call from any phone on which the number appears, and you can pick it up from hold on any phone on which the number appears.
This example shows a shared ephone-dn. Extension 1008 appears on both phone 7 and phone 8.
Is there a way for the shared line to ring? I've a customer with CME 3.x and shared lines, however, if one of the phones is using that shared line and another call comes in to the shared line, the phones don't actually ring (the line just flashes.
The shared line is assigned to button 2 on 7940. for example
button 1:16 2:18
button 1:17 2:18
edit: ps...they are config'd for dual-line..sorry - forgot to include that.
Yes, when a ephone-dn with a shared number has a call already, the other phones will not ring. You can think that the ephone that has taken the call actually "becomes" the ephone-dn and the associated number.
The workaround, is to configure another ephone-dn, to which CFB is set from the first, and place it on to some button. In your case case, it would become:
ephone-dn 18 dual-line
call-forward busy 1009
ephone-dn 19 dual-line
button 1:16 2o18,19
button 1:17 2o18,19
You can chain the CFB for as many lines you can possibly receiving calls. Depending on the telephone modem and other local setting you will use single or dual-line ephone-dn's.
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