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Author Topic: Short circuit telephone pair  (Read 10782 times)

digitalnemesis

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Re: Short circuit telephone pair
« Reply #15 on: August 15, 2016, 12:58:10 PM »

Thanks for that, what would be the safest way to 'load' a telephone line instead of shorting both wires?
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4candles

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Re: Short circuit telephone pair
« Reply #16 on: August 15, 2016, 01:14:45 PM »

At my previous property I used a 15k resistor to give 2 or 3mA of wetting current.

It was on the telephony side of the filter, and had no adverse effect on phone or BB.
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digitalnemesis

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Re: Short circuit telephone pair
« Reply #17 on: August 15, 2016, 01:28:29 PM »

At my previous property I used a 15k resistor to give 2 or 3mA of wetting current.

It was on the telephony side of the filter, and had no adverse effect on phone or BB.

Is there something I could buy which does this? I'm not comfortable with connecting resistors, etc.
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4candles

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Re: Short circuit telephone pair
« Reply #18 on: August 15, 2016, 11:24:22 PM »

Memory's not what it was, but I found this Usenet thread from 2010, where I was posting as '198kHz'.

As I recall, I ended up using 18kohms. I'm not aware of any commercial item, but I've got the bits in my junk box to knock something up for the price of the postage - please PM me if you're interested.
« Last Edit: August 16, 2016, 12:03:47 AM by 4candles »
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digitalnemesis

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Re: Short circuit telephone pair
« Reply #19 on: August 16, 2016, 12:43:54 AM »

Memory's not what it was, but I found this Usenet thread from 2010, where I was posting as '198kHz'.

As I recall, I ended up using 18kohms. I'm not aware of any commercial item, but I've got the bits in my junk box to knock something up for the price of the postage - please PM me if you're interested.

How much for postage and do you have a picture of how it all looks and connects?

Cheers
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4candles

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Re: Short circuit telephone pair
« Reply #20 on: August 16, 2016, 12:52:16 PM »

The basic premise is that one needs 18kohms across the A & B wires, on the telephony side of a filter. It needs to be easily removable; if a fault is reported, I don't think a BTOR technician would appreciate chasing 18k of 'low insulation' that turned out to be in your house.   ;)

I could fabricate this thing from an RJ11 adaptor, or a rat's tail ADSL filter - it all rather depends on your set up.

I gather from previous posts that you have a central filter on the master socket. Do you have any extension sockets, and if so, is there a 'spare' one with no phone.

If there is a spare extension socket, the adaptor option would be the neatest solution. Alternatively, it would mean a socket doubler (I have a spare one) feeding the phone and modified filter.

The first option would go as 'large letter' - first class 96p or second 75p.

Second one would be 'small parcel' at 񋠋5 first or 񋌤5 second.
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digitalnemesis

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Re: Short circuit telephone pair
« Reply #21 on: August 16, 2016, 02:21:53 PM »

The basic premise is that one needs 18kohms across the A & B wires, on the telephony side of a filter. It needs to be easily removable; if a fault is reported, I don't think a BTOR technician would appreciate chasing 18k of 'low insulation' that turned out to be in your house.   ;)

I could fabricate this thing from an RJ11 adaptor, or a rat's tail ADSL filter - it all rather depends on your set up.

I gather from previous posts that you have a central filter on the master socket. Do you have any extension sockets, and if so, is there a 'spare' one with no phone.

If there is a spare extension socket, the adaptor option would be the neatest solution. Alternatively, it would mean a socket doubler (I have a spare one) feeding the phone and modified filter.

The first option would go as 'large letter' - first class 96p or second 75p.

Second one would be 'small parcel' at 񋠋5 first or 񋌤5 second.

I have a NTE5A master socket and MK1 faceplate. From this I have a plug in extension to another room (nothing connected, just there in case) and a socket doubler feeding two telephones (1 corded, 1 DECT).

Which option do you think is best? Ideally I'd like this at the master socket. Would it work with a modified rat's tail filter connected to the MK1 faceplate?

Kind regards
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4candles

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Re: Short circuit telephone pair
« Reply #22 on: August 16, 2016, 05:58:39 PM »

Which option do you think is best?

If you mean where would it work best - no difference.

Ideally I'd like this at the master socket. Would it work with a modified rat's tail filter connected to the MK1 faceplate?

Yes.
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digitalnemesis

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Re: Short circuit telephone pair
« Reply #23 on: August 16, 2016, 06:05:28 PM »

If you mean where would it work best - no difference.

Yes.

Sounds good, can you please clarify again what I will get with option 1 and 2?

Option 1:
RJ11 adapter.
How exactly does the RJ11 adapter look like?

Option 2:
Socket doubler + modified filter
Is the socket doubler rat's tail?
I have limited clearance due to close proximity to a cupboard

Also, do you accept bank transfer or PayPal?
« Last Edit: August 16, 2016, 06:11:58 PM by digitalnemesis »
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4candles

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Re: Short circuit telephone pair
« Reply #24 on: August 17, 2016, 12:03:03 PM »

PM sent.
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digitalnemesis

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Re: Short circuit telephone pair
« Reply #25 on: August 17, 2016, 01:08:00 PM »

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digitalnemesis

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Re: Short circuit telephone pair
« Reply #26 on: August 17, 2016, 02:30:16 PM »

Did you get my PM?

Thanks
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aesmith

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Re: Short circuit telephone pair
« Reply #27 on: August 17, 2016, 03:49:42 PM »

Sorry to jump on this thread, but suppose I fitted one of these faceplates as discussed elsewhere ...


Could the resistor be fitted across the appropriate pair on the back of that socket?
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burakkucat

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Re: Short circuit telephone pair
« Reply #28 on: August 17, 2016, 06:22:55 PM »

Sorry to jump on this thread, but suppose I fitted one of these faceplates as discussed elsewhere ...


Could the resistor be fitted across the appropriate pair on the back of that socket?

No.  :no:  In the text accompanying that image there is the sentence --

Quote
Faceplate does not have extension wiring connections or telephone socket.
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4candles

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Re: Short circuit telephone pair
« Reply #29 on: August 17, 2016, 06:26:09 PM »

Did you get my PM?

Thanks

Aye, I'll get back to you ASAP.
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