Is the BYOD device in parallel with existing VOIPo phone?

[usa2k]

Yes.

And your main adapter has two lines already if that's all you need.
On the main ATA you can have two simultaneous calls going.

The key difference is the BYOD, or soft phone does not allow international calling, and uses different credentials from the plug&play VOIPo ATA.

VOIPo doe not provide personnel to support BYOD, but there is a user forum here: http://forums.voipo.com/forumdisplay.php?f=28

[pflueger41]

Well I use to be able to pick up a incoming call with either the softphone or voipo phone with all incoming calls but now only able to answer with either on the first incoming call and all others with only the softphone and the voipo phone giving a busy signal if I pick it up first while the softphone continues to ring . If I close the softphone and reopen the same cycle, first incoming both can answer , anything after that only the softphone.