Multiple extensions barging / call pickup without dialing feature code?

Is there any documentation on how to do this via DAHDI?

You do it at the punch-down block.

You actually share the line.

Hello @comtech,

You can barge to any channel technology, just change the protocol from SIP to DHADI.
But usually you are barging to SIP extensions, so it does not matter what is the other side technology.

Thank you,

Daniel Friedman