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tplink Posted:
Im trying to add
my HT802 vonage
adapter to my home
network. I
currently have
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Vonage behind switch
On Dec 05, 2016 at 06:35:11

DWSupport Posted:
After recent
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took place on the
4th and 5th of
Nov. E-mails with
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peterlee Posted:
Had a call from a
Hospital in Ajax,
Ontario to my home
in
Scarborough, Onta
rio
...

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TELLDOUG Posted:
I am looking for a
product that will
make my phone ring
louder so I can
hear using
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On Oct 26, 2016 at 09:21:30

HildBeft Posted:
You can recollect
password by
connecting the
router to your pc
and open the
browser
...

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Topic:
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On Oct 20, 2016 at 05:05:49

HildBeft Posted:
Great tips..
Thanks for sharing
...

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massrman Posted:
The devices are
available at
different price
margins , please
share your
estimated
...

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On Sep 30, 2016 at 00:48:03

massrman Posted:
Hi these are most
commonly used SIP
PBX interops and
their
configuration
guides,
...

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On Sep 30, 2016 at 00:37:45

Sammy00 Posted:
Has anyone setup a
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vonage? I have
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...

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On Aug 30, 2016 at 10:38:01

James44 Posted:
Hi, I am
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NateHoy
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PostPosted: Mon Feb 20, 2006 10:34 am    Post subject: Interesting Polarity Discovery on WRTP54G - Telco experts? Reply with quote Back to top

OK, I found something interesting on my WRTP54G (1.00.60) today, and maybe a telco expert can chime in and let me know how my results are wrong.

I've read, consistently, on several telco sites where people seem to know what they are talking about, that the RED wire in the Green/Red pair is the "Ring" or NEGATIVE polarity wire, and the GREEN wire is the "Tip" or POSITIVE polarity wire.

So, being a curious fellow, I took a piece of standard, decent-quality 4-wire telephone wire, chopped it in half, and stripped the red and green wires a bit.

I plugged the RJ11 end into my WRTP54G and put my trusty old Fluke-77 on it (red probe to green telco wire, black probe to red telco wire) and I get approximately -48V (negative 48 volts) DC.

Reversing the probes (red-red, black-green) gives me around +48VDC.

To verify that my test wire is correct... When I look at this piece of wire, with the clip side down (contacts up) and the wire end pointing toward me (plug pointing away), the colors are Black, Red, Green, Yellow in Left-to-Right order.

I have noticed that some of my 2-wire patch cables (one of which I happen to have plugged into my AT&T speakerphone) reverse the polarity of the signal, while most of my 4-wire patch cables do not. My speakerphone doesn't seem to care about polarity, but I have heard some devices do.

So, for anyone who knows, 100% for sure, what the polarity is, and where my testing might be wrong, please post back and tell me my research is bad.

Because if I'm right, then the type of patch cable used can have a profound effect on devices like modems, FAX machines, etc, which I understand have a lot more sensitivity to reversed polarity than your typical phone, and a lot of people's problems with modem-type communications gear may be solved by selecting a patch cable that reverses the polarity of the red and green pair.

Does anyone know if the wire included with the WRTP54G is a polarity-reversing one? I have gobs of patch cables around here and no clue which one came with my WRTP54G.

_________________
Comcast Cable (3m down / 256k up) -> Linksys BEFCMU10 v2 (DOCSIS 1.0) -> WRT54G v4 ("Tomato" firmware) -> the rest of my network including a WRTP54G (Firmware: 5.01.04)
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VonageTPA
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PostPosted: Mon Feb 20, 2006 6:41 pm    Post subject: Reply with quote Back to top

You are correct sir! I just threw my Fluke on the punchdown block and sure enough, I'm seeing reversed polarity as well. Traced my wiring down to the RTP300 and it's all straight-through. Hooked up my buttset to the RTP300 and it's definitely reversed polarity.

For the most part, modern telephone equipment doesn't care. Very old telephones might have problems with it, usually the original touch-tone sets. Of course, now that I've been made aware of this (thanks Nate) I'll certainly experiment with things and see if putting the polarity back to normal makes the Vonage device run differently. I'll also drop a love-note to the firmware engineers and see what they have to say about it. There's the rumblings of a newer firmware version, but it's still waaay off.

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reebok
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PostPosted: Mon Feb 20, 2006 7:30 pm    Post subject: Reply with quote Back to top

I honestly didn't read the post for very long, but are you saying the Vonage devices are reverse polarized? like these?
http://www.vonage-forum.com/ftopic5153.html
http://www.vonage-forum.com/ftopic5183.html
http://www.vonage-forum.com/ftopic3887.html
http://www.vonage-forum.com/ftopic2963.html

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Steve48
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PostPosted: Mon Feb 20, 2006 8:29 pm    Post subject: Reply with quote Back to top

John- Basically, yes.

Nate- I can confirm what you're saying. I'm 99.5% sure that red should be negative. I've measured this many times on POTS lines.

However, I just checked my wall jacks, and I'm getting the correct polarity there (red is negative). I'm pretty sure that my patch cord tying in the RTP300 is a reversing type, though I have to move a bookcase out of the way to get it out and test it. That means that I should have reversed polarity on my system, and I don't. Conclusion- the Vonage adapter has reverse polarity wiring.

Note- All of my four wire cords do reverse polarity (and the two wire ones as well).

Update- I've verified that the cord plugging my adapter into the wall jack is a reversing type. That results in the red wire being correct (negative). Jeez, anyone wanna help me move a bookcase back?

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a-dhold
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PostPosted: Mon Feb 20, 2006 10:44 pm    Post subject: Reply with quote Back to top

my RT31P2 is reversed too. i just made a cross-over cable to flip it for my house-wiring
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VonageTPA
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PostPosted: Mon Feb 20, 2006 10:48 pm    Post subject: Reply with quote Back to top

Steve48 wrote:
Update- I've verified that the cord plugging my adapter into the wall jack is a reversing type. That results in the red wire being correct (negative). Jeez, anyone wanna help me move a bookcase back?


If it's not causing you any problems, just let it be. There's millions of people running on landlines with reversed polarity without a problem. My punch-down block is on the underside of this desk (easily accessible) and I've not even bothered to pick up the punch-down tool. I've passed the reverse-polarity issue to the Vonage hardware folks, so there'll likely be a fix in the next RTP300/WRT54GP firmware... so you'll just have to switch everything back in another 1-2 months when that comes out.

_________________
ISP: Varies depending where I'm at.
Vonage: Linksys RTP300
Router: IPCop 1.4.10
Phones: various
Total calls since Jul 24, 2005: 4,794 calls
Total Minutes since Jul 24, 2005: 25,552 minutes

Last edited by VonageTPA on Mon Feb 20, 2006 11:02 pm; edited 1 time in total
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PostPosted: Mon Feb 20, 2006 10:55 pm    Post subject: Reply with quote Back to top

Actually, since I've been using a crossover cable all along (without being conscious of it) and the adapter is reversed, I've been getting the correct polarity. So it's no trouble at all.

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a-dhold
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PostPosted: Mon Feb 20, 2006 11:05 pm    Post subject: Reply with quote Back to top

VonageTPA wrote:
I've passed the reverse-polarity issue to the Vonage hardware folks, so there'll likely be a fix in the next RTP300/WRT54GP firmware... so you'll just have to switch everything back in another 1-2 months when that comes out.


i just wanted to alert you that it is reversed on the rt31p2 also, so you could ask your friends to add that device to their list of models that are reversed.

The reversal does create problems with a lot of tivo's and some fax machines


Last edited by a-dhold on Tue Feb 21, 2006 12:15 am; edited 2 times in total
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Steve48
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PostPosted: Mon Feb 20, 2006 11:39 pm    Post subject: Reply with quote Back to top

Actually that quote is from VonageTPA.

I'm glad you posted that information. It's interesting to know that at least 3 adapters (including both the WRTP54G and the RTP300) have the same issue. It makes me wonder whether they did it deliberately for some reason.

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PostPosted: Tue Feb 21, 2006 12:36 am    Post subject: Reply with quote Back to top

a-dhold wrote:
i just wanted to alert you that it is reversed on the rt31p2 also, so you could ask your friends to add that device to their list of models that are reversed.


Will do 'though I'm not sure where they stand on doing updates for the Sipura chipset boxes. They're under the general impression that the RT31P2 firmware is "mature" and stable, so convincing them's going to take a bit of work. I know Vonage UK still uses the RT31P2 exclusively, so they might be willing to work on another firmware upgrade for it (rather than firmware for the twilighted Cisco/Motorolas). In the meantime, there *IS* an option that the Vonage techs can swap on the RT31P2's to reverse the polarity.

_________________
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Vonage: Linksys RTP300
Router: IPCop 1.4.10
Phones: various
Total calls since Jul 24, 2005: 4,794 calls
Total Minutes since Jul 24, 2005: 25,552 minutes
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