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babaradish
Aspiring Contributor
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Message 1 of 12

Extension bells not working with ADSL filters

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I wonder if someone could advise me please. Since January I have subscribed to a BT Vision package. Unfortunately I am experiencing trouble with my phone line as a result.

 

Roughly 15 years ago, due to hearing loss, I had an extra bell installed (a 50E – Serial S/1000/3/K/501724) to amplify the sound from my old phone. In about 2003 I had an extra bell installed, also courtesy of BT – this is sealed against the wall and cannot be removed to check the model number. These bells are incompatible with the internet, so if I have the home hub plugged in, I experience constant white noise on the line (despite ADSL filters on my phone lines) which makes it very difficult to hear what is being said on the line. If extra ADSL filters are placed on the wires for both bells, the noise goes silent but so do the bells. The bells do not seem to work with ADSL filters.

 

What is BT's policy regarding the upgrading of these non-net-compatible bells?

 

Thanks in advance for your help,

Barbara

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Message 2 of 12

Re: Extension bells not working with ADSL filters

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Hi I suggest you contact the forum mods they should be able to get your problem sorted for you this is a link to them
http://bt.custhelp.com/app/contact_email/c/4951
they normally reply by email or phone directly to you within 3 working days

They are a UK based BT specialist team who have a good record at getting problems solved
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babaradish
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Message 3 of 12

Re: Extension bells not working with ADSL filters

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Thanks for the quick reply John,

 

I've forwarded the details onto the mods via your link, fingers crossed now!

 

Barbara

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Message 4 of 12

Re: Extension bells not working with ADSL filters

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hopefully they should be able to help the will contact you personally
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Message 5 of 12

Re: Extension bells not working with ADSL filters

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The bell should work provided that the "bell" wire coming from your master socket has not been disconnected. Its still a current model but may need a bit of re-arrangement when you have broadband.

 

Does you main master socket look like the picture below, and is that where you plug your home hub into?

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Message 6 of 12

Re: Extension bells not working with ADSL filters

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John,

There should be no issue with this bell provided there is a single filter at the master socket, and the continuity of the bell wire is maintained.

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Message 7 of 12

Re: Extension bells not working with ADSL filters

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thanks Keith it was the white noise that was my concern
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babaradish
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Message 8 of 12

Re: Extension bells not working with ADSL filters

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Hi Keith,

 

Thanks for the info - the main phone socket is in the hall, and does look similar to the picture, but BT-branded, with a phone and filter coming off it. Directly above that socket is another smaller socket, BT-branded, which leads up to the newer extension bell. The home hub isn't plugged into the hall socket as there's not a power point close enough.

 

Upstairs in the bedroom there's a more recent phone socket, smaller than the downstairs one with no BT branding, and that's what the home hub is plugged into, along with one of a pair of BT phones, the other of which is cordless and kept in the living room.

 

The 50E bell (the older of the two) is in the kitchen with the wire going around the outside of the house.

 

Barbara

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Message 9 of 12

Re: Extension bells not working with ADSL filters

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@john46 wrote:
thanks Keith it was the white noise that was my concern

That is being caused by the bell circuitry demodulating the broadband signal.

 

A single filtered ADSL faceplate fitted at the master socket, and terminal 3 left connected, should allow the bells to work as well as the broadband, provided that the home hub can be plugged into the ADSL faceplate.

 

Pin 3 must be left connected because the bells are fed from the bell capacitor in the master socket. This capacitor isolated the DC voltage from the line.

 

The "bell return" is via the "A" wire of the normal telephone cable.

The installation may be mor complex than that, and would need Openreach assistance to sort out.

 

Devon_Dave may be able to throw some light on the subject.

 

 

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Message 10 of 12

Re: Extension bells not working with ADSL filters

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@babaradish wrote:

Hi Keith,

 

Thanks for the info - the main phone socket is in the hall, and does look similar to the picture, but BT-branded, with a phone and filter coming off it. Directly above that socket is another smaller socket, BT-branded, which leads up to the newer extension bell. The home hub isn't plugged into the hall socket as there's not a power point close enough.

 

Upstairs in the bedroom there's a more recent phone socket, smaller than the downstairs one with no BT branding, and that's what the home hub is plugged into, along with one of a pair of BT phones, the other of which is cordless and kept in the living room.

 

The 50E bell (the older of the two) is in the kitchen with the wire going around the outside of the house.

 

Barbara


It does seem a bit complex, especially if you have the home hub upstairs. Its quite likely that the extensions do not all originate from the master socket, which makes things difficult.

 

The ADSL filters are probably breaking the continuity of the bell circuit and stopping the bells working.

 

It really needs an experienced Openreach technician to re-arrange the wiring so that the bells are both on the same circuit, and  fed from a filtered faceplate, without upsetting the broadband to your upstairs extension. A Broadband Boost technician would probably know more about these issues.

 

The problem is, that someone will have to pay for the technicians time, as the internal wiring is the responsibility of the customer.

 

You can see what the BT Care Team say, but in the end, its going to involve some internal rewiring and cost.

 

 

 

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