Phone Systems

Previous Thread
Next Thread
Print Thread
Rate Thread
Page 1 of 2 1 2
#471741 09/20/07 08:35 AM
Joined: Mar 2001
Posts: 3,268
Moderator-Allworx, Nisuko-Tie, Vodavi
OP Offline
Moderator-Allworx, Nisuko-Tie, Vodavi
Joined: Mar 2001
Posts: 3,268
https://www.cablemodeminfo.com/quicktip-cabling-power-ethernet.html-ssi
Does this work?? Can you do this at the patch panel end, and do a poor man's POE??-- Running the 24 volts over the blue & brown pair to the phone. Or is this just a bad idea?

We have several wall-mounted phones that need to have power, but have no power outlet near them. We're trying to find a nice, easy solution--but perhaps there is none. An expensive POE switch is not an option at this point.

EMP & Lightning Home Surge Protection
EMP - Click Here!
#471742 09/20/07 09:22 AM
Joined: Dec 2002
Posts: 9,400
Likes: 1
Member
*****
Offline
Member
*****
Joined: Dec 2002
Posts: 9,400
Likes: 1
I would imagine that it would work. POE switches just send the power over those 2 pairs.


Jeff Moss

Moss Communications
Computer Repair-Networking-Cabling
MBSWWYPBX, JGAE
#471743 09/20/07 09:33 AM
Joined: Mar 2001
Posts: 3,268
Moderator-Allworx, Nisuko-Tie, Vodavi
OP Offline
Moderator-Allworx, Nisuko-Tie, Vodavi
Joined: Mar 2001
Posts: 3,268
Well, that's what I was thinking too. We'll try it out first here in the shop. If it works, it will solve a big issue with an install coming up.

In fact, this seems to me to be a big issue with the IP systems all over. The AC adapters are fine for desks---but when you have wall-mounted phones---you run into a big problem. It looks real cheesy. It's like taking a step backward in technology.

#471744 09/20/07 11:28 AM
Joined: Dec 2002
Posts: 9,400
Likes: 1
Member
*****
Offline
Member
*****
Joined: Dec 2002
Posts: 9,400
Likes: 1
Well I had to run a camera in an area that had several unused cat 5e cables running to it. I used one cable for the video and another cable for power. I took the pairs and twisted them together and attached the power connectors.


Jeff Moss

Moss Communications
Computer Repair-Networking-Cabling
MBSWWYPBX, JGAE
#471745 09/20/07 12:02 PM
Joined: Dec 2005
Posts: 818
Member
Offline
Member
Joined: Dec 2005
Posts: 818
But POE switches are coming down in price so much it almost makes sense to just get them....even if the other way does work, seems like it could cause more headaches in the long run, besides, if you only need a few ports for wall mounts and such and AC adaptors are OK for the rest you can get a 8 port POE switch for real cheap.

Steve

#471746 09/20/07 04:07 PM
Joined: Jun 2007
Posts: 2,106
Member
Offline
Member
Joined: Jun 2007
Posts: 2,106
Netgear Prosafe FS108p and FS116p are small port density PoE Switches. They have 4 and 8 ports respectively of PoE capability and are pretty damn flawless unmanaged switches. I use them a lot in very small workgroup situations.

If you accept the fact that using that method you mentioned above means you have a live-wire then I see nothing wrong with it. That method is what valcom recommends on their powered PA Horns (minus the terminated connectors).

If you are pretty enough with your splicing and have lots of electrical tape you can make a fairly clean looking install.

For safety's sake I would clip the power pairs from running to the modular plug.

#471747 09/20/07 05:01 PM
Joined: Jan 2006
Posts: 340
Member
Offline
Member
Joined: Jan 2006
Posts: 340
Have u considered a POE injector?


Shawn
Absolute Communications, Inc.
#471748 09/20/07 05:02 PM
Joined: Mar 2001
Posts: 3,268
Moderator-Allworx, Nisuko-Tie, Vodavi
OP Offline
Moderator-Allworx, Nisuko-Tie, Vodavi
Joined: Mar 2001
Posts: 3,268
You're right!! I had done several googles of POE stuff, and all that came up were very expensive Cisco switches. I just thought that even the less expensive ones were like one-half---and THAT was even too much.

I then checked with our resident IT guys, and they showed me some decent switches for some decent prices.

We did look at some injectors and for just 4 or 5 phones they are a good deal---but the prices for a 24 port switch was pretty decent, so....

So we will be replacing the current switches with 24 port POE switches if we can. The dollar figure doesn't seem to be that huge. Thanks to all for the in-put.

#471749 09/20/07 06:26 PM
Joined: Jan 2002
Posts: 2,328
Moderator-Comdial
*****
Offline
Moderator-Comdial
*****
Joined: Jan 2002
Posts: 2,328
Beware,,, not POE devices are created equal. If the manufacturer says 802.3af then the voltage is supposed to be 48vdc. I recently bought some power injectors at www.winncom.com and installed them on some access points. Price was very reasonable.

#471750 09/20/07 07:36 PM
Joined: Nov 2002
Posts: 632
Member
Offline
Member
Joined: Nov 2002
Posts: 632
I have had to do this in the past,and it worked using the transformers that come with the equipment.

Page 1 of 2 1 2

Link Copied to Clipboard
Advertising Sponsor
Most Recent 5 Post
Old Equipment Plan
by MarkAtLMFJ - 03/05/21 04:41 PM
OS 7400 OAS
by John807 - 03/05/21 04:21 PM
Pair location
by backenhiemer - 03/05/21 10:44 AM
Coaxial Cable
by dexman - 03/04/21 03:53 AM
Netlink or CCIS
by Yoda - 03/02/21 02:32 PM
Popular Topics (Views)
Forum Statistics
Forums95
Topics94,287
Posts639,099
Members49,425
Most Online5,661
May 23rd, 2018
Today's Birthdays
ciccotelli, esinoob, Michael M
Newest Members
Sam Juniper, B Ledford, Jonie4, James Wright, TechnoloJay
49,425 Registered Users
Get Tech Support Now! Click the banner below
Get Tech Support Now!
Top Posters (30 Days)
dexman 30
Ruben 24
pvj 11
Linked Banner to your Product or Website
EMP Shield for Commercial - Home & Vehicle
Use Coupon code SAVE - Click Here!
Who's Online Now
15 members (BobRobert, Coral Tech, JBean3329, RM SYSTEMS, metelcom, Yoda, dexman, sundance, EV607797, backenhiemer, newtecky, hbiss, nortelvoip, justbill, Bob3470), 131 guests, and 45 robots.
Key: Admin, Global Mod, Mod
Custom Island 58
Contact Us | Telephone System Tech Support | Terms of Service

Sundance Communications is not affiliated with any of the above manufacturers.
©Copyright Sundance Communications 1998-2021
Trusted Partners