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From: Gary.R.Cook@stl.stc.co.uk (Gary Cook)
Newsgroups: comp.dcom.telecom
Subject: Dead BT Cordless Telephone
Message-ID: <8932@accuvax.nwu.edu>
Date: 13 Jun 90 11:46:53 GMT
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Reply-To: Gary Cook <Gary.R.Cook@stl.stc.co.uk>
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X-Telecom-Digest: Volume 10, Issue 432, Message 6 of 14


I have a BT Freeway cordless telephone which decided to stop working
after a call was cut off during lightning. At a geuss I would say that
the line protection circuit did its job and protected the rest of the
electronics, but blew itself up in the process.

I am a digital engineer, so all these upity downity signals with
little black components and capacitors confuse me. I have no circuit
diagram which makes it more difficult. I have traced the line circuit
to a couple of relays, through a zener back-toback pair and then a
choke.  The relays,chokes and zeners are OK but the unit still doesn't
work ... ie no dial tone when taken off-hook.

I think the cordless electronics are OK ... so I sort of think its the
protection bits ??

Any ideas or help would be greatly appreciated.


| Gary Cook  ,        | Tel: 044 279 29531 ext 2615 
| STC Technology Ltd, | e-mail: grc@stl.stc.co.uk   
| London Road,        
| Harlow,             | *Disclaimer* - The views/opinions expressed above are |
| Essex CM17 9NA, U.K.| not necessarily those adopted by STC Technology Ltd.  |

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