Panasonic KX-TD500 System Reference Manual page 532

Gaining access to a feature (in this case, Call
Waiting) (2)
A call arrives from another outside party during a
conversation with an outside party.
• You hear call waiting tone.
1. Press the External Feature
Access button.
With DPITS (only KX-
T7235/7230), press the EFA (S2)
button.
EFA
• The first party is held. Start
S2
conversation with the second
party.
Finishing conversation with the second party and
starting conversation with the first party again
1. Press the External Feature
Access button again, in case of
DPITS (only KX-T7235/7230),
press the EFA (S2) button.
EFA
• Start conversation with the first
party.
S2
4-G-16