Panasonic KX-TDA50 installation manual Cause

4.1 Troubleshooting

4.1.2Connection

Can you dial an extension?

Connection between the Hybrid IP-PBX and a PT:

No		CAUSE		SOLUTION
	The T/R is connected to the D1/D2.			Use the correct cord (the
				inner 2 wires are for T/R and
		D1	D1	the outer 2 wires are for
		T	T	D1/D2).
		R	R
		D2	D2
	Hybrid IP-PBX Extension

Connection between the Hybrid IP-PBX and an SLT:

Yes

CAUSE

The T/R is connected to the D1/D2.

	D1
	T	T
	R	R
	D2
Hybrid IP-PBX		Extension

SOLUTION

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

•If a telephone equipped with an A-A1 relay is connected to the Hybrid IP-PBX, set the A-A1 relay switch of the telephone to "OFF".

Connection between the Hybrid IP-PBX and an SLT that is polarity-sensitive:

	CAUSE		SOLUTION
The "T" is connected to the "R".			Reverse the connections of
			the T/R.
	D1
	T	T
	R	R
	D2

Hybrid IP-PBX Extension

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140 Installation Manual