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131 posts

Master Geek


# 21331 23-Apr-2008 09:33
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I just move to a house which was connected to Telstraclear.
Now I switch back to Telecom and found out the the socket are 3 wire system.

I just put in series another Master socket so its will be near my PC/DSL modem, using  no. 2 and 5.
Using a filter on each jackpoint for connecting devices.

Everything work at the moment inclduing DSL modem except one of my old phone which require the 3rd wire for ring tone.
( the old phone works but not able to ring when phone in). My cordless phone is fully functional.

 Just read throught some of the thread, best for me is to repalce all the old M/s socket with the newer

2 wire socket for best DSL performance. Can I just do that ?
Also intend to install Freeview Satellite late on which I understood the 3 wire can be affecting freeview as well.


Many thanks for all replies.
 

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3025 posts

Uber Geek


  # 125824 23-Apr-2008 11:13
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Getting rid of the 3rd wire results in better line balance to ground which may improve your DSL performance. You may already be getting decent performance and local DSL improvements don't  necessarily mean the overall result changes if there are bottlenecks in the network or ISP.

The 3rd wire isn't passed through line filters so that's why your old phone won't ring.

The overriding reason that Telecom changed to 2 wire jacks was to improve the electrical reliability of the jacks. Rather than an IDC to each jack contact, the Krone blocks were changed to allocate 3 slots each to 2 & 5 to reduce doubling up. The layout gave more +/- dc clearance and the socket was dipped in a coating to stop corrosion.



131 posts

Master Geek


  # 125854 23-Apr-2008 12:48
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I still have a couple old socket lable M (master), so I can just use these socket as 2 wire socket by repalcing the old slave
socket? or I need to buy new one!

 
 
 
 


3025 posts

Uber Geek


  # 125860 23-Apr-2008 13:07
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What are you trying to achieve? All newer phones don't need the capacitor in the jack for ringing. I don't think the plug in filters even connect to the jack capacitors. You could achieve 2 wiring just by disconnecting the redundant 3rd wire on terminal 3 on all jacks.



131 posts

Master Geek


  # 125869 23-Apr-2008 13:15
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OK I thought the the old Master Socket is different from the newer socket that's all. Yes I have done that already. Just pull out the third wire and retain no2 & 5.

Thanks

3025 posts

Uber Geek


  # 125875 23-Apr-2008 13:25
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The master differed from the later 2-W in that the floating end of the capacitor was connected via a 470k resistor to the other leg of the line to allow remote testing. Remote line testing might be another thing of the past.

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