Reverse Charge
reverse charge not subscribed:
calling terminal called terminal
/----------------\ /---------------\
DTE DCE DCE DTE
any terminal --- CALL -------? reverse charging not
can include the includes facility subscribed
reverse charge 0101 reverse call cleared by network
facility in a charge request
call request
?-- CLEAR 19 --
reverse charge subscribed - call cleared:
calling terminal called terminal
/----------------\ /---------------\
DTE DCE DCE DTE
any terminal --- CALL -------? -----?
can include the includes facility
reverse charge 0101 reverse
facility in a charge request
call request
?-- CLEAR 00 ---- ?-----
reverse charge subscribed - call accepted:
calling terminal called terminal
/----------------\ /---------------\
DTE DCE DCE DTE
any terminal --- CALL -------? -----?
can include the includes facility
reverse charge 0101 reverse
facility in a charge request
call request
?-- CALL ACC ---- ?-----
11.3 Reverse charge
Reverse charge acceptance is a subscription time option. If subscribed to
the network will forward the INCOMING CALL packet, with the reverse charge request
in the facility field, to the called terminal, which then has the option of
accepting or rejecting the call in the normal way.
If the terminal requests a reverse charge call and the request is refused
then the call is cleared. The requesting terminal is then charged for the call
attempt.
Facility code format is:
0100 no reverse charging (default)
0101 reverse charging
note this facility code can be combined with fast select facility codes.