Dialogic 6.2 - Manual (Page 199)

Making Two-Channel Call Transfers (Tromboning)
November 2009 199
In Figure 18 , the application places the caller on TSlot 1 on hold and
generates silence from channel 1 to the caller. There is a full duplex
connection between channel 0 and TSlot 0. Channel 0 is playing a
voice prompt to the caller on TSlot 0 while recording.
To take the caller on TSlot 1 off hold, re-establish the connections as
they were in Figure 17 .
Figure 18. Playing the Voice Prompt and Generating Silence
Terminating the Two-Channel Call Transfer
Your application terminates a two-channel call transfer by deleting
the transfer connections and restoring the original connections that
were present before the two-channel call transfer was created. After
terminating a two-channel call transfer, the application remains
connected to the original caller (person A). There are three situations
that cause a two-channel call transfer to be terminated:
„ If the application detects a recognition signal that indicates
terminating the two-channel call.
The application hangs up on the called party (person B) while
staying connected to the original calling party (person A).
„ The called party hangs up.
The application alerts the original caller of the remote hang up,
then disconnects the called party while staying connected to the
original calling party.
„ The original calling party hangs up.
The application should then disconnect the entire two-channel
call transfer and wait for another call.
Channel 0
In Out
Out Out In In
TSlot 0 TSlot 1
Ref In
Channel 1
In Out
Ref In
(Silence)