If you have been plagued by random dropouts on your broadband system this could help you.
Broadband signals don't travel far on telephone lines due to losses. It appears that my signals were only just making it at 36 dB attenuation. This is caused by the effect of an unused line in the cable, in times gone by used to work the bell. If you look in the master box on pin 3 you may still see a wire going to your extensions, this is not wanted so cut it off. the wire on pin 5 is not used but doesn't affect the signal. So you only have wires on pins 2 and 5 carrying the broadband signal.
This has cost me innumerable hours of diagnosis and frustration , I even rewired the phone ectensions and bought a complete DECT cordless system before the trouble was finally eliminated.
Broadband problem solved
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Cider Boys
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Allan
You are correct in that removing the ring wire from terminal 3 does remove an aerial effect of this wire
and can reduce interference.
However this wire is used to enable any extension phones plugged into secondary sockets to ring. The master socket is the only socket that has the ring capacitor and therefore the extensions will not ring without the third wire. This can be overcome by making sure all extension sockets are connected to the Broadband filters. These filters allow the ring current to pass through their own internal capacitor and therefore the extension will ring. Without the filter connected to the extension socket the extension phone will not ring without the third (bell) wire. As you suggest Allan, many phone installations with cable runs via sockets and junction boxes could benefit from eliminating any unnessary wiring.
Barney
You are correct in that removing the ring wire from terminal 3 does remove an aerial effect of this wire
and can reduce interference.
However this wire is used to enable any extension phones plugged into secondary sockets to ring. The master socket is the only socket that has the ring capacitor and therefore the extensions will not ring without the third wire. This can be overcome by making sure all extension sockets are connected to the Broadband filters. These filters allow the ring current to pass through their own internal capacitor and therefore the extension will ring. Without the filter connected to the extension socket the extension phone will not ring without the third (bell) wire. As you suggest Allan, many phone installations with cable runs via sockets and junction boxes could benefit from eliminating any unnessary wiring.
Barney
I don't know what this ring capacitor is supposed to do. Is it series or parallel.What ringing are you talking about, pulse or tone.
Regarding broadband filters you have to have them on all outlets to stop any phone shorting out the broadband signal, or alternatively you would put in one filter and feed the phone output from that to everywhere. In my case I have removed all the extensions except the wire to my computer room where the master phone of a cordless system of four is installed so the problem would not exist. The only other equipment is an answering machine fed via a filter from the master socket.
Regarding the effect of removing the wire the point there as given by the engineer who was at the exchange, removing the wire cut the attenuation from 36 dB to around 18 so the signal strength is vastly improved, not a case of cutting the noise online.
Allan
Regarding broadband filters you have to have them on all outlets to stop any phone shorting out the broadband signal, or alternatively you would put in one filter and feed the phone output from that to everywhere. In my case I have removed all the extensions except the wire to my computer room where the master phone of a cordless system of four is installed so the problem would not exist. The only other equipment is an answering machine fed via a filter from the master socket.
Regarding the effect of removing the wire the point there as given by the engineer who was at the exchange, removing the wire cut the attenuation from 36 dB to around 18 so the signal strength is vastly improved, not a case of cutting the noise online.
Allan
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Cider Boys
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Allan
It is nothing to worry about as long as the extensions are connected via a filter which has its own capacitor.
On the UK phone system the incomming ring at approx 75v a.c at 25 Hz passes down the B leg of the wire and passes through a capacitor which is connected between terminal 2 and 3 on the master socket. This enables all the other extensions to be rung from terminal 3 through the sounder and back to the A leg of the incomming line.
If you remove the wire on terminal 3 an extension phone plugged into an extension socket will not ring since there is no ring capacitor present in either the extension socket or phone to pass the ring current. However as long as you have a filter in the extension socket the ringing current will pass through the capacitor in the filter to enable the phone to be rung. On many systems abroad the ring capacitor is in the telephone and not in the master socket but due to evolution our system places the capacitor in the master socket only. This capacitor originally was part of a tuned circuit with the impedance of the bell coils and formed a tuned circuit to allow the a.c. ringing current to pass with minimum impedance.
Pulse or tone is the method of dialling, the old make and break pulses have now been superseeded by MF (Multi Frequency) tones.
Barney
It is nothing to worry about as long as the extensions are connected via a filter which has its own capacitor.
On the UK phone system the incomming ring at approx 75v a.c at 25 Hz passes down the B leg of the wire and passes through a capacitor which is connected between terminal 2 and 3 on the master socket. This enables all the other extensions to be rung from terminal 3 through the sounder and back to the A leg of the incomming line.
If you remove the wire on terminal 3 an extension phone plugged into an extension socket will not ring since there is no ring capacitor present in either the extension socket or phone to pass the ring current. However as long as you have a filter in the extension socket the ringing current will pass through the capacitor in the filter to enable the phone to be rung. On many systems abroad the ring capacitor is in the telephone and not in the master socket but due to evolution our system places the capacitor in the master socket only. This capacitor originally was part of a tuned circuit with the impedance of the bell coils and formed a tuned circuit to allow the a.c. ringing current to pass with minimum impedance.
Pulse or tone is the method of dialling, the old make and break pulses have now been superseeded by MF (Multi Frequency) tones.
Barney
I couldn't get online up here so I went down on the other computer which did much better as you can see on p.m. Now upstairs, this one too has logged on. I have seen this sort of thing before, what goes on. Do I have to wait until the engineer has finished his cup of tea and can crank up the generator. If it is a case of overload then surely the early hours should be the best.Someone told me that other ISPs timeshare to a maximum of 50 subscribers, but Tiscali go beyond that, is this true and would it apply before 6 a.m.?
Allan
Allan