Panasonic KX-TES824, KX-TEM824 installation manual Cause

4.1 Troubleshooting

4.1.2Connection

Telephone cord connecting the PBX and a proprietary telephone (PT):

Can you dial an extension?

No			CAUSE			SOLUTION
	The T/R pins are connected to the H/L					Use the correct cord (the
	pins.					inner 2 wires are for T/R and
						the outer 2 wires are for H/L).
		H			H
		T			T
		R			R
		L			L
		PBX		Extension

Telephone cord connecting the PBX and a single line telephone (SLT):

CAUSE

The T/R pins are connected to the H/L pins.

H
T		T
R		R
L
PBX	Extension

SOLUTION

Use the correct cord (the inner 2 wires are for T/R).

Yes

Can you dial out using an outside (CO) line?

Telephone cord connecting the PBX and an SLT that is polarity-sensitive:

		CAUSE			SOLUTION
The T and R pins are crossed over.					Reverse the connections of
					the T/R pins.
	H
	T			T
	R			R
	L
	PBX		Extension

Telephone cord connecting an outside (CO) line and the PBX:

		CAUSE		SOLUTION
	The outside (CO) line(s) is			Reconnect the outside
	connected to the H/L pins.			(CO) line(s) to the T/R pins
No				of the telephone jack using
				2-conductor wiring.
			T
			R
	Outside (CO) line PBX

Installation Manual

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