Panasonic KX-TD500 System Reference Manual page 595

Operation
(CAI=No)
1. Lift the handset.
• You hear dial tone 1, 3, or 4.
2. Dial the specified CO line.
• You will hear a dial tone even if
a CO line is not available.
3. Dial the telephone number.
• After dialing all of the
telephone number and a CO
line is not available, you will
hear busy tone 3.
4. Replace the handset.
5. When a CO line becomes idle,
you will hear the callback ring.
6. Lift the handset.
• The last number dialed is
dialed automatically.
(CAI=Yes : Default)
1. Lift the handset.
• You hear dial tone 1, 3, or 4.
2. Dial the specified CO line.
• When an idle line is not
3. Replace the handset.
4. When a CO line becomes idle,
you will hear the callback ring.
5. Lift the handset.
• You will hear a dial tone.
5-A-15
available, you will hear busy
tone 3.
You have to dial the desired
number again.