Panasonic KX-TD500 System Reference Manual page 452

5.03 Busy Station Signaling (BSS)
Description
When the called extension user is busy talking on
a DN or CO button, and the DN button is idle,
Busy Station Signaling informs the other
extension user that he or she is called by another
extension with the flashing DN button.
The called extension user's telephone must be
off-hook.
To activate this function, assign "System-Class of
Service", BSS/OHCA to "Yes".
Programming
System Programming
"System-Class of Service (1/3)",
BSS/OHCA
Conditions
Busy Station Signaling is ineffective if the called
extension is preset to either of the following
functions:
• "System-Class of Service", BSS/OHCA
Deny is set to "Yes".
• "System-Class of Service", Call Forwarding/
Do Not Disturb is set to "Yes".
Operation
Calling an extension
1. Lift the handset or press
the SP-PHONE button.
2. Dial the directory number of the
other extension.
• You hear busy tone.
Reference
VT Dumb
10-D-4.01 11-C-7.00
4-C-18
3. Dial " 3 ".
With DPITS (only KX-
T7235/7230), press the BSS
(S1) button.
• You hear ringback tone.
BSS BSS • The indicator on the DN button
of the other station flashes in
S1 S1
240 wink.
(Supplement)
If the all DN button of the other station is
occupied, the caller hears busy tone.
Answering the call
The indicator on the DN button flashes in 240
wink. (When you set the Call Waiting feature to
"Set", you hear the call waiting tone at the same
time.)
Talking to the second caller by disconnecting the
first party
1. Press the flashing DN button.
DN
• Talk to the second party.
• The indicator on the DN button
lights.
Talking to the second caller by holding the first
party
1. Press the HOLD button.
• The first party is placed on
hold.
2. Press the flashing DN button.
DN
• Speak to the second party.
• The indicator on the DN button
lights.
3. Press the button that is flashing
in 60 wink to talk to the first party
again.
• The second party is
disconnected. Talk to the first
party.