I trunked my OBI110's LinePort with a backend PBX.
I also hang the OBI's PhonePort on the PBX as an extension using SIP.
When a call comes in from PTSN, I can pick up either from
1 - a phone on the PhonePort
2 - a SIP client connect to the PBX
3 - a phone directly connected to the PTSN line (hard line)
When there is a conversation going on via the Obi's PhonePort
I can pick up the call from a set directly connected to the PTSN line.
Is it possible to do the reverse? To interrupt and pick up a call
using the Obi/PBX when the call was initiated from the hard line?
If so, how would I go about setting it up?