Posted: Sun May 24, 2009 2:52 pm Post subject: [asterisk-users] [UK SPECIFIC] DAHDI and a OpenVox Card
I can really only speak to questions 2;
The other 2 pins in your cable are for your second phone line - if you
have one that is. You should be able to plug in a 4 wire cable into any
socket in the house and get access to Both lines.
On Sat, 2009-05-23 at 16:02 +0100, Dunc wrote:
Quote:
Hi everyone,
I just found this thread, which is amazing as I'm on my first go with
asterisk and so far I've been pulling my hair out for the last week :-)
I have 2 questions which were raised while this fault was being debugged.
1)
Gordon says:-
> Is this a place where you get a polarity reversal event on call startup?
In the UK we do. (Well on BT lines - I've a funny feeling some
Telewest/NTL lines use Bell signaling).
On an incoming call we get:
Polarity reversal.
FSK Caller ID burst
Ringing
Well I've got an NTL phone line, can anyone tell me what to use for that?
2)
Do I still need the same 2pin cable? Because I've been to Maplins too
and bought one that I thought was right, but this one is a 4pin too.
Can anyone tell me which pins on their 2pin cable are connected at each
end? I'll bodge my cable until it works and then get a proper one once
I'm sure.
Thanks in advance.
Dunc
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Posted: Sun May 24, 2009 5:28 pm Post subject: [asterisk-users] [UK SPECIFIC] DAHDI and a OpenVox Card
On Sun, 24 May 2009, Mark Phillips wrote:
Quote:
I can really only speak to questions 2;
The other 2 pins in your cable are for your second phone line - if you
have one that is. You should be able to plug in a 4 wire cable into any
socket in the house and get access to Both lines.
Quote:
Mark Phillips, G7LTT/NI2O
Randolph, NJ
It's not done that way in the UK.
BT (via OpenReach) will install a 2nd master socket for a 2nd phone line.
Internally we normally run 3 wires. The 3rd wire carries the ringing
current, isolatesd via a capacitor - also acts as a "tinkle suppressor"
which stops bells tinkling on other phones when you use a phone with a
loop-disconnect dialler.
In these enlightened days, it's normal to not use the 3rd wire internally
on extension as it has been known to degrade an ADSL signal.
I think this last comment is very true indeed.
I purchased something called an i-plate here in the UK. I'd seen many
feedbacks about how it had improved broadband performance. It is a
basically a small plugin device for the BT master socket that contains a
decent filter and a terminator for the bell-wire. They cost around £10
and take only a minute to fit.
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