Panasonic KX-TD500 User Manual page 239

Extending the call duration while calling a CO line
From Outside Telephone
When you make a call to any CO line using the DISA feature, the
line is disconnected after a pre-programmed time (default: 10 min)
any key except " "
Dial any key except " "
after the warning tone.
Re-try
From Outside Telephone
It is possible (by System Programming) to dial a different number during a conversation
with an outside party or while hearing a ringback, reorder, or busy tone.
Press .
You hear a dial tone.
If you dial " " while hearing a DISA outgoing message,
dial tone, or after the DISA outgoing message, the call
will be disconnected.
Warning for the Direct Inward System Access Users
When you enable the CO-to-CO Line Call feature of Direct Inward System Access (DISA)
function, if a third party discovers the password (a DISA User Code) of the system, you have
a risk that they will make illegal phone calls using your telephone line, and the cost may be
charged to your account.
In order to avoid this problem, we strongly recommend the following points:
1: Carefully maintain the secrecy of the password.
2: Specify a complicated password as long and random as you can make it.
3: Change the password frequently.
User Manual
You must dial a line access code (9 or 801 through 848)
when calling an outside party.
Station Features and Operation (PT/SLT)
desired no.
239