"BLF Operation: Barge In
When the monitored extension is on a connected call, the monitoring phone may barge in to join the call, if the softswitch
supports the operation and if the feature is enabled in the phone configuration. This operation requires the
specification of a barge-in feature code that can be configured under the ITSP Profile of the SP service that is bound to
the BLF key. To barge in, the OBi1000 sends a normal INVITE to the number formed by concatenating the barge-in
feature code with the number of the monitored extension (the ext attribute of the Number parameter, if exists or
else the {userid} attribute). (BroadSoft, FreePBX"
Can anyone translate how to actually program this?