Panasonic KX-TD500 System Reference Manual page 1467

4.00 Testing the Ports
4.01 Functions to be Verified
This test verifies the status of the ports for the functions listed below.
1. By entering the physical port number (Except pairs of extension and CO ports).
Card
PLC OHCA Detect
HLC
Speech Path
DLC
HDLC
Speech Path
DHLC
OHCA Detect
HDLC
HDLC
ATLC
DISA
Speech Path
DTMF Receiver
Tone Detector
AGC Speech Path
Repeater
Tone Detector
2. By entering the physical port number of extension and CO ports in pairs.
Card
LCOT Speech Path
GCOT Loop Current
RCOT
Bell Detect
PCOT DTMF Dial (DTMF Generator)
Pulse Dial
SLC Speech Path
HLC Bell
MSLC DTMF Detector (DTMF Receiver)
OPX Pulse Detect
DHLC
ESLC
(Note)
You cannot test the ATT port which is used as the maintenance device.
Functions
Functions
15-F-7
Remarks
Port to be tested should be
"OUS" or "FAULT".
Remarks
2 ports to be tested should
be "OUS" or "FAULT".
SLC, HLC, OPX, MSLC,
DHLC, ESLC and DTMF
receiver to be tested should
be "OUS" or "FAULT".