Panasonic KX-T336 System Reference Manual page 324

Conditions The following table describes the DTMF codes, call state and typical
condition where the KX-T336 system would send the code.
Code Call State
Ringback Tone
A 1
Busy Tone
B 1
Reorder Tone
B 2
DND Tone
B 3
Answer
A 2
Forwarded to Voice
C 1
Mail (Ringing)
Forwarded to Voice
C 2
Mail (Busy)
Forwarded to
C 3
Extension (Ringing)
Confirmation Tone
D 1
Disconnect
D D
(Reorder Tone)
3-F-22
(21292)
Typical Conditions
Sent to the VPS when the extension it
dialed is ringing.
Sent to the VPS when the extension it
dialed is busy.
Sent to the VPS if it dials an invalid
extension number or if it is
inadvertently connected to another
VPS.
Sent to the VPS if the dialed extension
has set DND feature (Do Not Disturb).
Sent to the VPS when the called
extension answers the call.
Sent to the VPS if the caller is
forwarded to a voice mail port and that
voice mail port is available to accept
the call.
Sent to the VPS if the caller is
forwarded to a voice mail port and that
voice mail port is not available to
accept the call.
Sent to the VPS if the caller is
forwarded to another, non-voice mail,
extension.
Sent to the VPS when it successfully
dials a message waiting lamp on or
message waiting lamp off code.
Sent to the VPS when the calling party
disconnects.