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

In The Forum:
Hard Wiring - Installation
How to arrive at wifi password?
On Oct 20, 2016 at 05:05:49

HildBeft Posted:
Great tips..
Thanks for sharing

In The Forum:
Hard Wiring - Installation
How to have Vonage and another land line?
On Oct 20, 2016 at 04:55:03

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

In The Forum:
IP PBX for small business
On Sep 30, 2016 at 00:48:03

massrman Posted:
Hi these are most
commonly used SIP
PBX interops and

In The Forum:
IP PBX for small business
On Sep 30, 2016 at 00:37:45

Sammy00 Posted:
Has anyone setup a
W52p phone for
vonage? I have
a W52p with two
wireless handsets,

In The Forum:
Hard Wiring - Installation
W52p Setup
On Aug 30, 2016 at 10:38:01

James44 Posted:
Hi, I am
looking for a good
Sip Trunking
provider in
Canada. they
should offer

In The Forum:
A good sip trunking provider
On Jul 17, 2016 at 23:42:46

James44 Posted:
Which network
connection do you

In The Forum:
Wireless Access Point plugged into switch
On Jul 13, 2016 at 22:55:00

jjatsk Posted:
We are renting a
few offices right
next door to our
main building. I
have a wireless

In The Forum:
Wireless Access Point plugged into switch
On Jul 09, 2016 at 12:00:54

Pman Posted:
Hello, While
Vonage has been a
great service over
the years, it is
time to part

In The Forum:
LNP – Local Number Portability
Cannot port phone number to new carrier - repeated failures
On Jul 05, 2016 at 09:12:07

jbugz67 Posted:
We recently
purchased 5
Polycom VVX 300
phones from
Vonage, and have

In The Forum:
Nothing but problems with VVX300
On Apr 15, 2016 at 14:58:07

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Vonage Thanks for your inputs. I am very interested in what you told me. However, there

Thanks for your inputs. I am very interested in what you told me. However, there are a couple of things as I will describe below that have convinced me that it is perfectly OK to use the two unused twisted pairs to transmit Ethernet signals.

1) My testing setup included a 100-meter long CAT5 cable with a RJ45 splitter at one end connecting two computers and another RJ45 splitter at the other end connecting two Ethernet switch ports of a Router, both of the two computers "ping" to the router at the same time. The length of "ping" packets was set to the maximum length 1518B. After being left running overnight, the result showed only a couple of packets got lost. I did not remember the total number of packets being transmitted, though.

2) I also did some calculations on the added cross talks (NEXT loss) when the two unused twisted pairs are also used to transmit another channel of Ethernet signals, and the added cross talk is still within the 100Base-TX specification. See the picture below, Figure (A) is what I copied from IEEE802.3 regarding the minimum near end cross talk (NEXT) loss, and Figure (B) is the maximum near-end cross talk (NEXT) that one transmit pair of a Cat5E cable can cause. transmitting on the unused twisted pair is equivalent to increase the cross talk by 3dB (doubled). You can pick up different frequency points to compared the two numbers. For example, at 100MHz, the NEXT loss required by IEEE 802.3 is 27.1dB minimum, the total cross talk caused by two transmitting pairs within a CAT5 cable is 35.3dB-3dB=32.3dB, which is still more than 5dB lower than what IEEE802.3 requires (these dB number are actually negative). Therefore I believe it is safe to use the two unused pairs for a second 100M Ethernet signals.

3) Cisco has a 96-port Ethernet switch that uses two unused twisted pairs for a second Ethernet signals. Here is the link to the Cisco's web page:

Cisco Splitter Patch Panel

Pay attention to what they said below:
" The splitter patch panel is used with the WS-X6148X2-RJ-45 10/100 Ethernet module to provide you with 96 Ethernet ports. The WS-X6148X2-RJ-45 Ethernet module has 48 physical RJ-45 connectors. By utilizing the two unused Ethernet pairs in each connector, the port density of the module is doubled."

Thus, If I don't miss something in a big way, I am really confused by what you claimed that you can only run at 10M when the splitters are used.

Can you describe in a little more details how you do the CAT5 testing with RJ45 splitters installed?

I am wondering if or not the cables you are using are just CAT3, not CAT5. CAT3 is not good to run even one Ethernet sginal.


Read The Full Thread:

Use RJ45 splitters to connect a PC and an ATA by one Cat5

[color=Blue:d9f0923bbd] RJ45 CABLE SPLITTER - Use it to connect PC and VoIP ATA
Wierd. In your examples, why would you not just plug the devices directly into
These have been around for years. Work fine with 10M, can cause problems with
Yeah, 100 and 1000 were what I was thinking about. If anyone is still running 10
- This RJ45 splitter definitely works with 100M Ethernet or fast Ethernet.
By using a pair of RJ45 splitters connected by a CAT5 cable of 4 twisted pairs, which
Your test is meaningless. It's a single, isolated, uncontrolled configuration.
zq - who are you, what happened to dualcomm? what were your stats at the mac
I was surprised it showed up as "zq". I did use "zq" as an ID somewhere else. I guess

zq posted "Thanks for your inputs. I am very interested in what you told me. However, there" on 05/23/2007

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