sundance-communications.com/forum Forums TDM Business Telephone Systems NEC Telephones & Systems solution of SIP and digital extensions both ring ?

Ring assignment: one SIP phone and one digital extension ring at same time, then go to voice mail if no answer.

As can't put Virtual Extension or any other button on SIP phone, current solution is:
SIP phone have the main number 444, put a virtual extension key 444 and voice mail key 444 on the digital extension.
call forward 444 to VM if busy or no answer.

The issue is that if the SIP extension is not registered in the phone system, you can't make the digital phone rings.

Any idea?

Call forward busy no answer to the digital extension.

Or you could do a CallFWD Both from the SIP terminal to the digital with the digital CFNA to voicemail meaning that it will go to the mailbox of the SIP phone 444 on no answer..

I just test that, it works when SIP phone is registered, not if SIP phone is gone.

Call forward both ring perhaps?

Yes, I just did that.
call forward both ring from 444 to 471, then 471 CFNA to voice mail.

when 444 is SIP phone and 471 is digital, OK when SIP phone is online. But can't call 444 if SIP phone is not registered, I mean none of them rings.

When 444 is digital and 471 is SIP, OK when SIP phone is online. 444 will ring forever while SIP is not registered. It just rings, not goes to voice mail.
I think maybe this is the best solution.