Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.




3143 posts

Uber Geek
+1 received by user: 565

Trusted

Topic # 61113 10-May-2010 00:41
Send private message

hi all

Does a master and slave telephone jack matter anymore?

I have never seen a wiring layout like the flats we currently have. A few years back we disconnected all the phone plugs and wired up a pabx system. Now i am wanting to switch it to voip and my question is about telecom telephone wiring.

Basically, can I wire my voip ATA into the back of a slave socket and disconnect the line to the road in the demarc box?

I remember being told that you dont get ringing on slave telephone jacks if you dont have a master in line first, but am wondering if this has something to do with older 3-wire systems where the master acted as more of a converter, and the capacitor circutry took the 3rd wire's voltage and added it into the 2wire system for common 2 wire telephones to use?

I do know that the demarc box on the side of the house has some circutry inside that looks like it is similar to a master socket without a plug- but this circutry is not connected to the auctual wiring.





Ray Taylor
Taylor Broadband (rural hawkes bay)
www.ruralkiwi.com

There is no place like localhost
For my general guide to extending your wireless network Click Here




Create new topic
26231 posts

Uber Geek
+1 received by user: 5815

Moderator
Trusted
Biddle Corp
Lifetime subscriber

  Reply # 328350 10-May-2010 08:05
Send private message

Bit of a mess but it should work fine.

The old 3 wire system was mainly to act as an anti tinkle when decadic dialling was used. In an ideal world all sockets should be 2 wire but since you're only using it for voice and not ADSL it should work fine.



2357 posts

Uber Geek
+1 received by user: 255


  Reply # 328362 10-May-2010 08:27
Send private message

raytaylor: hi all
I remember being told that you dont get ringing on slave telephone jacks if you dont have a master in line first, but am wondering if this has something to do with older 3-wire systems where the master acted as more of a converter, and the capacitor circutry took the 3rd wire's voltage and added it into the 2wire system for common 2 wire telephones to use?



As Steve says

For completeness, the capacitor or capacitors (early 2 wire jacks) connect to the 3rd wire for 3 wire phones. 2 wire phones have their own internal capacitor and only need connection to the 2 line wires. Master and secondary jacks while OK in the UK were always subject to corrosion in NZ "leaky" homes. In 2010 don't expect them to be in top condition. The ATA ringing voltage is likely to be lower and less likely to show up low insulation between pairs.

 
 
 
 


Try Wrike: fast, easy, and efficient project collaboration software


3143 posts

Uber Geek
+1 received by user: 565

Trusted

  Reply # 328613 10-May-2010 17:23
Send private message

Awesome.
I will just replace the masters that i come across with slaves,

Thanks again




Ray Taylor
Taylor Broadband (rural hawkes bay)
www.ruralkiwi.com

There is no place like localhost
For my general guide to extending your wireless network Click Here




2357 posts

Uber Geek
+1 received by user: 255


  Reply # 328633 10-May-2010 17:52
Send private message

raytaylor: Awesome.
I will just replace the masters that i come across with slaves,

Thanks again


Unless you're putting in new jacks there's no point in swapping masters with anything just disconnect the 3rd wire.

Create new topic



Twitter »

Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





News »

Opera launches new mobile browser: Opera Touch
Posted 25-Apr-2018 20:45


TCF and Telcos Toughen Up on Scam Callers
Posted 23-Apr-2018 09:39


Amazon launches the International Shopping Experience in the Amazon Shopping App
Posted 19-Apr-2018 08:38


Spark New Zealand and TVNZ to bring coverage of Rugby World Cup 2019
Posted 16-Apr-2018 06:55


How Google can seize Microsoft Office crown
Posted 14-Apr-2018 11:08


How back office transformation drives IRD efficiency
Posted 12-Apr-2018 21:15


iPod laws in a smartphone world: will we ever get copyright right?
Posted 12-Apr-2018 21:13


Lightbox service using big data and analytics to learn more about customers
Posted 9-Apr-2018 12:11


111 mobile caller location extended to iOS
Posted 6-Apr-2018 13:50


Huawei announces the HUAWEI P20 series
Posted 29-Mar-2018 11:41


Symantec Internet Security Threat Report shows increased endpoint technology risks
Posted 26-Mar-2018 18:29


Spark switches on long-range IoT network across New Zealand
Posted 26-Mar-2018 18:22


Stuff Pix enters streaming video market
Posted 21-Mar-2018 09:18


Windows no longer Microsoft’s main focus
Posted 13-Mar-2018 07:47


Why phone makers are obsessed with cameras
Posted 11-Mar-2018 12:25



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.