I am trying to figure out something here: we have a FXS station currently plugged-in the UCM directly and used by a few phones on the line (only 1 line anyway). Now, we want to add a SIP phone from GS and we want it to use the same extension to be able to have the same voicemail for both phones.
We looked at VM groups but it is not what we want at all. And using a dummy extension prevent us from having a MWI monitoring. The workaround using BLF can’t be used, the new phone doesn’t have BLF (DP7xx).
Anyone has found a way? I could simply use a SIP extension with multiple registration but I would need a separate HT801 to convert it again to analog. Is there a way to use the built-in FXS ports for that?