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Vintage Telephony and Telecomms Vintage Telephones, Telephony and Telecomms Equipment |
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1st Feb 2020, 6:13 pm | #1 |
Triode
Join Date: Apr 2009
Location: Swindon, Wiltshire, UK.
Posts: 30
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Bell not ringing.
Chaps
I have an ivory 332L which I have had for many years and up to now it has worked perfectly. I also have a Gigaset set of 3 cordless phones throughout the house. My ISP is Virgin Media and they have just upgraded me to VOIP. The problem is that if someone rings me, I can hear the other person and they can hear me but the 332L bell does not ring. The cordless phones all work perfectly. The Engineer wants to fix the problem but he does not know what to do. Does anyone have any idea what the cause of this could be ? Many thanks Mick |
1st Feb 2020, 6:24 pm | #2 |
Octode
Join Date: Mar 2011
Location: Sheffield, South Yorkshire, UK.
Posts: 1,453
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Re: Bell not ringing.
My bet is that there's no ringing capacitor connected. Try linking terminals 10 and 11 in the 332.
Last edited by ThePillenwerfer; 1st Feb 2020 at 6:42 pm. Reason: Added diagram. |
1st Feb 2020, 7:51 pm | #3 |
Triode
Join Date: Apr 2009
Location: Swindon, Wiltshire, UK.
Posts: 30
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Re: Bell not ringing.
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1st Feb 2020, 9:18 pm | #4 |
Heptode
Join Date: Apr 2011
Location: Edinburgh, UK.
Posts: 805
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Re: Bell not ringing.
The phone was probably plugged into an ordinary BT line socket, which includes the ringing capacitor and presents the ring signal on pin 3 of the line jack.
The Virgin VoIP output is probably 2-wire only on BT pins 2 and 5 (or pins 3 and 4 of the RJ11). You can also get RJ11 to BT adapters that include a ringing capacitor. |
1st Feb 2020, 9:32 pm | #5 | |
Dekatron
Join Date: May 2010
Location: Greater Manchester, UK.
Posts: 18,676
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Re: Bell not ringing.
Quote:
The short 'RJ11 to "BT" socket' cable they supply, to connect your phone to the FSX port on the router has no capacitor, they get away with this because 99% of phones in use don't need it. If you don't want to do "ThePillenwerfer" mod, find an ADSL/VDSL filter and plug it between the "BT" socket and the phone(s).
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1st Feb 2020, 9:54 pm | #6 |
Triode
Join Date: Apr 2009
Location: Swindon, Wiltshire, UK.
Posts: 30
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Re: Bell not ringing.
Hi
I am totally non technical, so please excuse my illiteracy. Will this be ok https://www.ebay.co.uk/itm/RJ11-Plug...-/262671846092 Regards Mick |
1st Feb 2020, 10:52 pm | #7 |
Dekatron
Join Date: Feb 2005
Location: West Cumbria (CA13), UK
Posts: 6,118
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Re: Bell not ringing.
Yes, that should work. I have an identical one which I use successfully to connect a three-wire configured telephone to a capacitorless source (a fixed wireless terminal in my case).
N.B. the link is included simply to clarify what I mean by a FWT.
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2nd Feb 2020, 12:10 am | #8 |
Triode
Join Date: Apr 2009
Location: Swindon, Wiltshire, UK.
Posts: 30
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Re: Bell not ringing.
Thank you
I shall order one. Many thanks Mick |
2nd Feb 2020, 11:41 am | #9 |
Rest in Peace
Join Date: Apr 2012
Location: West London, UK.
Posts: 665
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Re: Bell not ringing.
Hi Mick,
bear in mind old Phones use connection 3 for the ring, whereas modern phones may not. This can mislead as your are comparing against (modern?) Cordless phones. I had a similar problem to you and eventually found the Broadband filter was missing pins 3 and 4. Regards - Mike |
25th Feb 2020, 5:50 pm | #10 |
Nonode
Join Date: Oct 2014
Location: West Midlands, UK.
Posts: 2,181
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Re: Bell not ringing.
Very simple cure on a slave line jack if it's a slave on first socket is to wire up a telephone capacitor between pins 2 & 3 of the socket.
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25th Feb 2020, 8:52 pm | #11 | |
Dekatron
Join Date: Jan 2003
Location: Bradford on Avon, Wiltshire, UK.
Posts: 3,301
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Re: Bell not ringing.
Quote:
An ADSL filter between VOIP phone socket on modem and wiring would probably work. You might need a lead with a phone plug at both ends though.
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26th Feb 2020, 6:09 am | #12 |
Dekatron
Join Date: Jun 2015
Location: Biggin Hill, London, UK.
Posts: 5,190
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Re: Bell not ringing.
The method that I favour is to wire the old telephone exactly as on the associated N diagram (that is, with the internal bell capacitor in-circuit). Connect the line cord to a suitable Block Terminal ('junction box') but fit a 3k3 resistor in place of the extension bell strap (this puts the resistor in series with the telephone bell). Connect the line wire terminals in the Block Terminal to the outside 2 contacts of the Plug 431A (normal UK telephone plug).
Although you now may get bell tinkle (is that a real problem?) you don't have to worry about a capacitor in the master socket. And the telephone is 'original' inside and out. |
26th Feb 2020, 3:31 pm | #13 | ||
Nonode
Join Date: Oct 2014
Location: West Midlands, UK.
Posts: 2,181
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Re: Bell not ringing.
Quote:
Tim- I suggested this on the first socket ( adding a capacitor between terminals 2 & 3) of a slave as a resolution of problem. A lot of the firms I worked for would only order in master sockets ,as buying in bulk meant that install engineers had the best stuff at lowest price. Simple master - slave conversion was removal of the capacitor. Hence why I and a lot of other systems engineers saved the caps, added wires and if caught short of a master had a capacitor to fit. The resistor would still be in place on a "modified" master. As for the ADSL filter, it's not needed on every phone if the ADSL & phone paths are split as close to PC as possible and then house wiring returned as multi plan 1A. Example 1- I split ADSL and phone at master and run the house WiFi . Example 2- I run the ADSL+phone to socket ( 2W) close to PC. Fit filter and send ADSL to PC, and then return phone to master socket to supply rest of house. |
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