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295 posts

Ultimate Geek


# 21085 15-Apr-2008 14:33
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Hi all



Quick question on trying to fault find a "voice quality" issue on our new home Telecom lines.



Symptoms: When using both our phone lines (one of which has ADSL on) when talking to people they comment that they can barely hear you, yet we can hear them clear as day. When you lift the receiver there is no detectable noise at all. We are in semi rural and probably around 5km from the exchange. OUr ADSL is really good for the distance:

Statistics Downstream Upstream

Line Rate 2592 Kbps 160 Kbps

Attainable Line Rate 2848 Kbps 860 Kbps

Noise Margin 13.1 dB 24.0 dB

Line Attenuation 63.0 dB 31.5 dB

Output Power 18.1 dBm 7.1 dBm



Is it possible that my wiring (this is a new home with a Signet 8 port Phone module installed) is at fault or is there a line issue somewhere in between that can only affect "outgoing voice"? Im about to start trying to isolate it by checking wiring and also removing ADSL etc. Ive used a hot of phones (cordless, and fixed) and all the same. Tried various patch cables, different wall ports .. no luck.

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295 posts

Ultimate Geek


  # 123675 15-Apr-2008 14:49
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PS

Rang Telecom Faults and used our "home line" (as opposed to my office line) and he did ma test and found no faults. He said I could be heard very clearly.

Would seem strange that when I ring people around Gisborne or around NZ so many of them comment that they can not hear me very clearly.

1 post

Wannabe Geek


  # 123677 15-Apr-2008 15:01
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Think I see your problem: "We are in semi rural and probably around 5km from the exchange."

 
 
 
 




295 posts

Ultimate Geek


  # 123678 15-Apr-2008 15:03
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Ecolitan: Think I see your problem: "We are in semi rural and probably around 5km from the exchange."

So that wouldnt affect our quality hearing them as well, ie just affect us being heard?

Maybe its time to go Vfx at Xnet :)

18 posts

Geek


  # 124627 18-Apr-2008 09:11
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Hey do you have wireless internet? do you use a cordless phone with the 2.4 Ghz Range on it?


637 posts

Ultimate Geek

Trusted

  # 124656 18-Apr-2008 09:58
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thekiwi:
Is it possible that my wiring (this is a new home with a Signet 8 port Phone module installed) is at fault or is there a line issue somewhere in between that can only affect "outgoing voice"? Im about to start trying to isolate it by checking wiring and also removing ADSL etc. Ive used a hot of phones (cordless, and fixed) and all the same. Tried various patch cables, different wall ports .. no luck.

Although your comment about having tried a lot of phones that this is probably irrelevant; are they by any chance US imports?  There is a known problem with poor far-end voice quality with some phone imports that haven't passed PTC in NZ.



295 posts

Ultimate Geek


  # 124658 18-Apr-2008 10:01
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holmesr: Hey do you have wireless internet? do you use a cordless phone with the 2.4 Ghz Range on it?


Have got 2 sets of Panasonic phones and pretty sure none is in the 2.4Ghz range. In our old house we had no issues.
* Panasonic KX-TC1230NZW
* Pansonic KX-TGA121AZ Handsets which from memory are somewhere in the 1.8 Ghz range

But have tried the line with just a wired phone, and people still commented.

Funny enough, since ringing Telecom things have been improved (from what Im told)



295 posts

Ultimate Geek


  # 124659 18-Apr-2008 10:02
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PenultimateHop:
thekiwi:
Is it possible that my wiring (this is a new home with a Signet 8 port Phone module installed) is at fault or is there a line issue somewhere in between that can only affect "outgoing voice"? Im about to start trying to isolate it by checking wiring and also removing ADSL etc. Ive used a hot of phones (cordless, and fixed) and all the same. Tried various patch cables, different wall ports .. no luck.

Although your comment about having tried a lot of phones that this is probably irrelevant; are they by any chance US imports? There is a known problem with poor far-end voice quality with some phone imports that haven't passed PTC in NZ.


Nope all purchased in NZ and Telepermitted

 
 
 
 


18 posts

Geek


  # 124673 18-Apr-2008 10:27
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I think I can tell you exactly what the problem is if your router is 802.11g you need a 2.5 Ghz cordless phone as 2.4 Ghz doesn't take interference very well. Imo its well worth the shot let me know how you get on 



295 posts

Ultimate Geek


  # 124675 18-Apr-2008 10:32
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holmesr: I think I can tell you exactly what the problem is if your router is 802.11g you need a 2.5 Ghz cordless phone as 2.4 Ghz doesn't take interference very well. Imo its well worth the shot let me know how you get on


Linksys WAP is only 802.11b

But with Cordless phones all unplugged the problem still existed (although would appear doesnt at the moment after weeks of problems)

18 posts

Geek


  # 124677 18-Apr-2008 10:41
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thekiwi:
holmesr: I think I can tell you exactly what the problem is if your router is 802.11g you need a 2.5 Ghz cordless phone as 2.4 Ghz doesn't take interference very well. Imo its well worth the shot let me know how you get on




Linksys WAP is only 802.11b



But with Cordless phones all unplugged the problem still existed (although would appear doesnt at the moment after weeks of problems)

Hmmmm that is odd does sound a little more like a line fault have you got any electric fences or something that may be causing inference, have you tried different line filters? what brand are they? You could try this out of interest, take the filter off the modem and plugging it straight into the wall and having a filter on one phone that is worth a shot



295 posts

Ultimate Geek


  # 124680 18-Apr-2008 10:45
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holmesr:
thekiwi:
holmesr: I think I can tell you exactly what the problem is if your router is 802.11g you need a 2.5 Ghz cordless phone as 2.4 Ghz doesn't take interference very well. Imo its well worth the shot let me know how you get on




Linksys WAP is only 802.11b



But with Cordless phones all unplugged the problem still existed (although would appear doesnt at the moment after weeks of problems)

Hmmmm that is odd does sound a little more like a line fault have you got any electric fences or something that may be causing inference, have you tried different line filters? what brand are they? You could try this out of interest, take the filter off the modem and plugging it straight into the wall and having a filter on one phone that is worth a shot


COnsidered the Splitter, but the second phone line was also affected whcih doesnt have any ADSL on it.

The Splitter is the same as the ones Telecom supply (BLack Box which is connected before phones)

3002 posts

Uber Geek


  # 124692 18-Apr-2008 11:26
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With analogue phones the send & receive paths are 4-wire only in the phones or after the line port at the exchange. Maybe someone noticed something about the send path settings of your line ports and corrected the problem. The line itself would affect levels in both directions.



295 posts

Ultimate Geek


  # 124693 18-Apr-2008 11:30
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Bung: With analogue phones the send & receive paths are 4-wire only in the phones or after the line port at the exchange. Maybe someone noticed something about the send path settings of your line ports and corrected the problem. The line itself would affect levels in both directions.


Awesome, thanks for confirming that.

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