4.1 Troubleshooting

4.1.1 Installation

PROBLEM

PROBABLE CAUSE

SOLUTION

•	Extension telephone does not function.

•	Faulty connection between the PBX and telephone.

•	Plug the telephone into the same extension port using a short telephone cord. If the telephone functions, then the connection between the PBX and the telephone must be repaired.

•	Faulty telephone.

•	Plug the telephone into a known functioning extension port. If the telephone does not function, replace the telephone.

•	A telephone with an A-A1 relay is connected.

•	Use a 2-wire cord. Set the A-A1 relay switch of the telephone to the "OUT" or "OFF" position.

•	Faulty extension card.

•	Exchange the card for a known functioning one.

•	Proprietary telephones (PTs) connected to extension jacks do not operate, but single line telephones (SLTs) do.

•	The H and L pins of extension jacks may have shorted.

•	Turn the Power Switch to the "OFF" position. Fix the shorted part, then turn the Power Switch to the "ON" position.

•	Noise heard through external pager (loudspeaker).

•	If using an amplifier, noise may be being introduced through the cable connecting the PBX and the amplifier or loudspeaker.

•	Use a shielded cable to connect the PBX and the amplifier or loudspeaker. A shorter cable will introduce less noise.

•	Audio (Music on Hold, Background Music) is distorted.

•	Audio level from the output of the audio source is too high.

•	Decrease the output level of the external audio source by using the volume control on the audio source.

•	Speed Dialling or One-touch Dialling does not function.

•	Incorrect programming.

•	Store the outside (CO) line access number (for example, 9 or 0, 81 through 88) at the beginning of the telephone number.

•	Improper operation other than the above.

•	Turn the Power Switch to the "OFF" position, and then back to the "ON" position.

4.1.2 Connection

4.1.3 Operation

PROBLEM

PROBABLE CAUSE

SOLUTION

•	When using the speakerphone on an analogue proprietary telephone, no sound is heard.

•	The HANDSET/HEADSET selector is set to the "HEADSET" position.

•	When the headset is not used, set the HANDSET/HEADSET selector to the "HANDSET" position.

•	The proprietary telephone (PT) does not ring.

•	The ringer volume is set to off.

•	Set to "HIGH" or "LOW".

•	During a power failure, PTs connected to jack numbers 01, 09, or 17 do not operate.

•	Only single line telephones (SLTs) can be used during a power failure. Disconnect the PT and connect an SLT.

•	Outside (CO) line calls cannot be made with a PT.

•	A flexible button on the PT has not been programmed to select an outside (CO) line.

•	Programme the CO buttons. Refer to "1.18.2 Flexible Buttons" in the Feature Guide.

•	An SLT set to "tone" dialling mode cannot make calls.

•	There may be something wrong with the DTMF receiver.

1.	Select "Enable" for DTMF receiver 1 and "Disable" for DTMF receiver 2 through system programming, "DTMF Receiver Check [107]".
2.	Try to make a call using a tone-type SLT connected to one of extension jacks 01–08.
3.	If you cannot make the call, the problem may have been caused by DTMF receiver 1. If the call can be made, go to step 4.
4.	Try DTMF receiver 2. Select "Disable" for DTMF receiver 1 and "Enable" for DTMF receiver 2 through system programming, "DTMF Receiver Check [107]", and make another call. If you cannot make the call, the problem may have been caused by DTMF receiver 2. If the call can be made, go to step 5.
5.	Check the other 4 DTMF receivers the same way through "DTMF Receiver Check [107]" in system programming.

4.1.4 System Restart

If the PBX does not operate correctly, confirm that the operation/feature is being used correctly and refer to the Troubleshooting section if necessary. If the PBX still does not operate correctly, restart the PBX.

When the PBX is restarted:

•	Calls on Hold are terminated.
•	Calls on Exclusive Hold are terminated.
•	Calls in progress are terminated.
•	Automatic Callback Busy (Camp-on) is cleared.
•	Call Park is cleared.
•	Last Number Redial is cleared.
•	Saved Number Redial is cleared.

No other data is cleared by System Restart.

To restart the PBX, turn the Power Switch to the "OFF" position, then turn the Power Switch back to the "ON" position.

Note
	If the PBX still does not operate correctly, please see "4.1.5 System Reset with System Data Clear".

4.1.5 System Reset with System Data Clear

When the PBX does not operate correctly after restarting, you can clear the programming data stored in the PBX. The PBX will restart with the default settings.

Make sure that all outside (CO) lines you use are connected to the PBX.

Slide the System Clear Switch to the "CLR" position.

Press the Reset Button, and then return System Clear Switch to the "NOR" position before the power indicator stops flashing. (The power indicator will flash for about 5 seconds.)

CAUTION
	Before touching the System Clear Switch and Reset Button, put on an earthing strap.

Notes
	•	After pressing the Reset Button, make sure to return the System Clear Switch to the "NOR" position before the power indicator stops flashing, otherwise the system data will not be cleared.
	•	The recorded OGMs for DISA, UCD, and Built-in Voice Message are not cleared by the System Data Clear.