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Teledex phones: Models DiamondPlDiamond+s,Diamond+LS-10E they all have the us A, same problem. When connected to a line are dead untill you press the releas switch2-3 times ,then they start to oparate. When left for sometime with the handset on , the same problem happens when the handset is lifted. Surely they all dont have release switch problems. The problem must be elsewhere (transistor or capacitor etc. Thank you George Mavros

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  • mavrosg May 09, 2010

    These 100 telephones came from a hotel which they use their telephone system. At the moment I am testing them on my domestic line which has different cable from the hotel. Surely not all the hotel extensions have cable problems.

    When I connect the line cable to any of these telephones I wait there for ever for dialing tone which I dont get until I press the release button few times, then it will continue to work as long its left connected to the line. Once the telephone is dicconected from the line and left for hours the problem re-appears.


  • mavrosg May 09, 2010

    I have 100 telephones exhibiting the problem. It cannot be cable problem as these units came from a hotel which uses a system .I am testing them on my domestic line. Strange thing is ,once working and left connected the problem never comes back. If they are disconnected and for a few hours the problem re-appears





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Hi, from the detailed explanation you made above concerning the Teledex phone, you actually guess right by mentioning the transistor and capacitor. But the real problem is with the transistor, it is actually getting weak day by day and that is why you have to press the release switch thrice before the phone responses. All you need to do is change the transistor immediately and do a general servicing of the phone before it starts affecting other parts.

Take care

Posted on May 09, 2010

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Hi George.

Transistors and capacitors do not do this kind of things. The problem is usually caused by a bad line signal, due to line problem or to phone cable problem.

Test the phones on a different line, and use a different phone cable.

If phones are programmed, the delay is caused by the phone looking for the right signal path. There are buttons that are used to program delay and flashing.If they had been programmed, that is the reason for the problem.
In this case reset and programming procedure depend on the phone model. Refer to models respective manuals.

Finally, some set may need firmware upgrade. To get the upgrade you need to contact Teledex. Contact and manuals on website below.

Teledex Support.


Posted on May 09, 2010


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