When phone rings, ADSL goes down?

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alkit

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Hi,

For some strange reason, ever since I changed over my ADSL from my secondary line to my main phone line, it disconnects every time a call comes in.
IE - As soon as the phone starts ringing, the internet connection drops.
If I wait about 30 seconds (even if someone is still on the phone from that incoming call), then the internet will re-connect and I'm back online again.

Additionally, connection seems to also break every so often during the work day. However, at night and on the weekends, unless the phone rings, the connection is fully stable.

Do you know what could be causing either of these problems?

Thanks
 
Well, the router goes directly into the wall socket (no splitter necessary as far as I'm aware).

On the phone, I've tried 2 different Telkom POTS filters, and neither solve the problem.

Eyenstyn said:
Do you have a splitter? One line to phone and the other to router?
Click to expand...
 
Is a pots filter the same as a splitter? How many phone lines do you have in your house? The signal is getting interrupted either because of a wiring problem or a bigger problem like the telephone lines outside, but we can eliminate that because you are receiving phone calls.
 
Eyenstyn said:
Is a pots filter the same as a splitter? How many phone lines do you have in your house? The signal is getting interrupted either because of a wiring problem or a bigger problem like the telephone lines outside, but we can eliminate that because you are receiving phone calls.
Click to expand...

Yes, sorry, I realised I interchanged that word above. I meant to say POTS filter. I cancelled my secondary line, so now only have 1 active phone line. There are about 4 phone wall outlets, but only 1 outlet actually has a phone connected to it.
 
I've had the problem before and my issue was the copper coming in to my house or more specifically the voltage on the copper. If the voltage is too low, then your line cannot sustain a ADSL signal and a voice signal and will desynch/drop the adsl component. Once the call is over the ADSL will reconnect. Ask telkom to check the voltage accross your line and show them that it disconnects when called, they can see it quite easily if you phone from a non-telkom line and have the call center test the line with the adsl on it by phoning and monitoring.

They had to switch my copper pair from the bollard in front of my building.
 
Kosmik said:
I've had the problem before and my issue was the copper coming in to my house or more specifically the voltage on the copper. If the voltage is too low, then your line cannot sustain a ADSL signal and a voice signal and will desynch/drop the adsl component. Once the call is over the ADSL will reconnect. Ask telkom to check the voltage accross your line and show them that it disconnects when called, they can see it quite easily if you phone from a non-telkom line and have the call center test the line with the adsl on it by phoning and monitoring.

They had to switch my copper pair from the bollard in front of my building.
Click to expand...

What he said. I had the same issue, except Telkom wasn't helpful enough to do anything about my issue.

Luckily I moved so no more of that in new place.
 
Easy to test. Just connect POTS filter....connect phone and modem to it.
I'm guessing the phone and modem are in diffirent rooms...?
connect them to the same pots filter.test it.
if it does not work then yes....your voltage is too low.
 
Last edited:
drukkie said:
Easy to test. Just connect POTS filter....connect phone and modem to it.
I'm guessing the phone and modem are in diffirent rooms...?
connect them to the same pots filter.test it.
if it does not work then yes....your voltage is too low.
Click to expand...

Wouldn't connecting a router to a pots filter kill the signal anyway? As I understand it a pots filters job is to block the 1 and 0's of a digital transmission ie: spikes and lows. If the line goes into a pots and then the router, the signal will be degraded.
 
Kosmik said:
Wouldn't connecting a router to a pots filter kill the signal anyway? As I understand it a pots filters job is to block the 1 and 0's of a digital transmission ie: spikes and lows. If the line goes into a pots and then the router, the signal will be degraded.
Click to expand...
Yes, but your technical understanding of how the POTS filter functions is incorrect ;)

The POTS filter is a low pass filter (effectively blocking higher frequencies). Here's a diagram of how the frequency ranges on the telephone line looks: http://upload.wikimedia.org/wikipedia/commons/8/87/ADSL_frequency_plan.svg
So the POTS filter lets the PSTN (voice) frequency range through, and blocks the ADSL frequencies.

The splitter filter which has both a modem and a telephone socket is simply a splitter, where the modem socket is directly connected to the input, and the telephone socket is connected to a POTS filter that is connected to the input.

So you can either use a splitter filter to connect the ADSL modem & telephone, or you can plug the ADSL modem directly in on the Telkom line, and then on another Telkom socket, you can connect a POTS filter to which you connect the telephone.
 
Kosmik said:
Wouldn't connecting a router to a pots filter kill the signal anyway? As I understand it a pots filters job is to block the 1 and 0's of a digital transmission ie: spikes and lows. If the line goes into a pots and then the router, the signal will be degraded.
Click to expand...

Yes it would but think he was confusing a pots filter with a splitter, but anyway your line comes into a splitter with two RJ-11 ports. You plug the router into the one port and the pots filter goes into the other port then the phone goes into the pots filter.

But you get some pots filter which you can plug your adsl router into the one RJ-11 Port labeled adsl and one labeled phone is for the phone.

So it all depends on what pots filter they have available to them.

Line Splitter
line-splitter1.jpg


Pots filter with Adsl and Phone Port
adslfilter.gif


Pots filter for the Phone only
adsl-inline-pots-filter-596.jpg


My line uses a Line Splitter with a Pots Filter for my phones only with 2 RJ11 ports.
 
Last edited:
Had this problem a few times. Including no phone tone at all but perfect adsl.

The techie said it was something at the exchange with me.
 
Merenwenrago said:
Yes it would but think he was confusing a pots filter with a splitter, but anyway your line comes into a splitter with two RJ-11 ports. You plug the router into the one port and the pots filter goes into the other port then the phone goes into the pots filter.

But you get some pots filter which you can plug your adsl router into the one RJ-11 Port labeled adsl and one labeled phone is for the phone.

So it all depends on what pots filter they have available to them.

Line Splitter
line-splitter1.jpg


Pots filter with Adsl and Phone Port
adslfilter.gif


Pots filter for the Phone only
adsl-inline-pots-filter-596.jpg


My line uses a Line Splitter with a Pots Filter for my phones only with 2 RJ11 ports.
Click to expand...

Thanks this helped clarify a lot :)
 
Merenwenrago said:
Yes it would but think he was confusing a pots filter with a splitter, but anyway your line comes into a splitter with two RJ-11 ports. You plug the router into the one port and the pots filter goes into the other port then the phone goes into the pots filter.

But you get some pots filter which you can plug your adsl router into the one RJ-11 Port labeled adsl and one labeled phone is for the phone.

So it all depends on what pots filter they have available to them.

Line Splitter
line-splitter1.jpg


Pots filter with Adsl and Phone Port
adslfilter.gif


Pots filter for the Phone only
adsl-inline-pots-filter-596.jpg


My line uses a Line Splitter with a Pots Filter for my phones only with 2 RJ11 ports.
Click to expand...
Where is the best place to get a top quality adsl pots filter other than Telkom?
 
Reviving a really old thread here:

I actually have the exact opposite problem.
My line disconnects quite easily and reconnects the moment I make a call from my landline.

I'm guessing it is a problem with the exchange or low voltage.

Have anyone ever heard of such a problem? I've tested with more than one POTS filter and only have the one phone connected.
Also have to add, the problem has come up about three months ago, where my service would suddenly become very slow and I had to restart my modem.
This happened with increasing frequency until I couldn't handle it anymore.

I swapped out modems, had Telkom reset my port etc, nothing makes it better.
The callcenter lady that did the reset did say that there's currently maintenance at my exchange..
 
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