A Broadband and ADSL forum. BroadbanterBanter

Welcome to BroadbanterBanter.

You are currently viewing as a guest which gives you limited access to view most discussions and other FREE features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload your own photos and access many other special features. Registration is fast, simple and absolutely free so please, join our community today.

Go Back   Home » BroadbanterBanter forum » Newsgroup Discussions » uk.telecom.broadband (UK broadband)
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

uk.telecom.broadband (UK broadband) (uk.telecom.broadband) Discussion of broadband services, technology and equipment as provided in the UK. Discussions of specific services based on ADSL, cable modems or other broadband technology are also on-topic. Advertising is not allowed.

DECT and FTTC, any known issues?



 
 
Thread Tools Display Modes
  #21  
Old January 8th 20, 07:12 PM posted to uk.telecom.broadband
Chris Green
external usenet poster
 
Posts: 225
Default DECT and FTTC, any known issues?

Andy Burns wrote:
Woody wrote:

To Chris per the move to FTTC, don't forget that for FTTC implementation
you exchange pair is taken out of your serving street cab to the FTTC
cab and back in to your street cab for the pair to your premises.


Could the A and B legs have been reversed, and the DECT base not like
that, but the POTS phone doesn't care?


Can someone tell me how to check please. I know it's just a case of
which wire is at (approximate) ground potential and which is at 50v or
so but, off the top of my head, I don't know which should be which.

--
Chris Green

  #22  
Old January 8th 20, 07:24 PM posted to uk.telecom.broadband
Woody
external usenet poster
 
Posts: 773
Default DECT and FTTC, any known issues?

On Wed 08/01/2020 18:12, Chris Green wrote:
Andy Burns wrote:
Woody wrote:

To Chris per the move to FTTC, don't forget that for FTTC implementation
you exchange pair is taken out of your serving street cab to the FTTC
cab and back in to your street cab for the pair to your premises.


Could the A and B legs have been reversed, and the DECT base not like
that, but the POTS phone doesn't care?


Can someone tell me how to check please. I know it's just a case of
which wire is at (approximate) ground potential and which is at 50v or
so but, off the top of my head, I don't know which should be which.


The 'supply' is actually -50V as there is a sacrificial anode at the
exchange. Find which way round the supply is on the pair and negative is A.

--
Woody

harrogate three at ntlworld dot com
  #23  
Old January 8th 20, 07:27 PM posted to uk.telecom.broadband
Andy Burns[_5_]
external usenet poster
 
Posts: 452
Default DECT and FTTC, any known issues?

Chris Green wrote:

Can someone tell me how to check please. I know it's just a case of
which wire is at (approximate) ground potential and which is at 50v or
so but, off the top of my head, I don't know which should be which.


B leg should be -48V, and that becomes pin2, or blue with white stripe
on your internal wiring.

  #24  
Old January 8th 20, 07:39 PM posted to uk.telecom.broadband
Andy Burns[_5_]
external usenet poster
 
Posts: 452
Default DECT and FTTC, any known issues?

Woody wrote:

Find which way round the supply is on the pair and negative is A.


From BT SIN 351

quote
3.3. Line Polarity

The polarity of the BT network interface will normally be such that the
‘B' wire is more negative than the ‘A' wire. A configurable option
exists to reverse the polarity of the calling terminal's ‘A' and ‘B'
wires once a call is ‘answered', after which the polarity will remain in
this state for the duration of the call.
/quote
  #25  
Old January 8th 20, 07:48 PM posted to uk.telecom.broadband
Woody
external usenet poster
 
Posts: 773
Default DECT and FTTC, any known issues?

On Wed 08/01/2020 18:39, Andy Burns wrote:
Woody wrote:

Find which way round the supply is on the pair and negative is A.


From BT SIN 351

quote
3.3. Line Polarity

The polarity of the BT network interface will normally be such that the
‘B' wire is more negative than the ‘A' wire. A configurable option
exists to reverse the polarity of the calling terminal's ‘A' and ‘B'
wires once a call is ‘answered', after which the polarity will remain in
this state for the duration of the call.
/quote

I stand corrected.

--
Woody

harrogate three at ntlworld dot com
  #26  
Old January 8th 20, 09:19 PM posted to uk.telecom.broadband
Chris Green
external usenet poster
 
Posts: 225
Default DECT and FTTC, any known issues?

Andy Burns wrote:
Chris Green wrote:

Can someone tell me how to check please. I know it's just a case of
which wire is at (approximate) ground potential and which is at 50v or
so but, off the top of my head, I don't know which should be which.


B leg should be -48V, and that becomes pin2, or blue with white stripe
on your internal wiring.

Thank you (and the others), I'll check it out tomorrow.

--
Chris Green

 




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Fake internet known as broadband does'nt work any more 7[_2_] uk.telecom.broadband (UK broadband) 4 January 22nd 18 04:39 PM
Three months of FTTC issues AlecR uk.telecom.broadband (UK broadband) 2 September 13th 15 11:01 PM
Gigaset e.g. A220A DECT : Clone name/numbers from Panasonic DECT (e.g. KX-TCD3-00E ? Maurice Batey uk.telecom.broadband (UK broadband) 7 March 16th 13 01:27 PM
Virgin Media, now known as WibblyWobblyInternet WendyBurger uk.telecom.broadband (UK broadband) 7 December 2nd 11 11:59 PM
Wanadoo to become known as Orange! CheggersPop uk.telecom.broadband (UK broadband) 9 July 20th 05 09:11 PM


All times are GMT +1. The time now is 09:05 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.Content Relevant URLs by vBSEO 2.4.0
Copyright 2004-2020 BroadbanterBanter.
The comments are property of their posters.