Panasonic KX-TD500 System Reference Manual page 446

The following flowchart shows the simplified procedure of toll restriction plan for
System Speed Dialing.
When an outgoing CO call is made by
dialing a System Speed Dialing Code
(TRLSD=01 to 16)
Compares TRLSD with TRLE
The call is made
(Transmit the registered
number to CO line)
* In this case, "Local Trunk Dial Access restriction" and "Individual Trunk Group Dial
Access restriction" assigned in Class of Service are disregarded.
TRLE<TRLSD
TRLE≥TRLSD*
4-C-12
Start
When an outgoing CO call is made by
dialing a System Speed Dialing Code
(TRLSD=00)
Checks a call against System Toll
Restriction feature
not restricted
The call is prohibited
(sends reorder tone)
restricted