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What is the difference between RJ-11 and RJ-12

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I have the GXV-3000 IP Video phone, there is a RJ11 jack on the back. How do I use the interface? Connect to my phone line from ATT or connect to a regular phone (as an extention?)? Thanks.


A copy of the user manual for your IP phone is found here: http://www.grandstream.com/user_manuals/GXV3000_User_Manual.pdf

I have browsed through and found no mention of an RJ-11 port on the back, only two RJ-45 Network ports, one for connecting to a PC in switch mode and one for ethernet mode.

If your phone is different and DOES have an RJ-11 port (as some IP phones do), I can only assume it is to connect to a landline to offer landline services as well as IP services.

Under those circumstances of course DO NOT attempt to plug in your landline RJ-11 into an RJ-45, it will not work and you risk shorting something out.

May 03, 2011 | Grandstream GXV-3000 IP Video Phone

1 Answer

I have a cable modem that doesn't want to accept the RJ-45 cable (I think that's what it is called.) I've tried several different quality cables with no luck. Strange problem. Any tips?


Some RJ 45 jack cable has fault so try with another RJ 45 jack cable .. Purchase new rj 45 jack cable from nearest computer shop. There must be 2 port on modem 1 for ADSL phone line cable and otthr for LAN ethernet port means RJ 45 jack port. Try with another rj 45 jack cable it should be connect.Make sure that LAN port of modem is not faulty means make sure pins on that port are not break. Let me know if you need further assistance. Thanks for using FixYa.

Jul 24, 2010 | Computers & Internet

1 Answer

1994 Grand Cherokee: I have a code 11,12 and 25 on my 1994 jeep grand c...


http://allpar.com/fix/80s-codes.html has the trouble codes.

May 18, 2010 | 1994 Jeep Grand Cherokee

1 Answer

Does it make a difference if i use a wire splitter? does it make a difference of the order the phone pins are connected in the wire splitter?


What are you doing? Are we talking about telephones (RJ-11) or are we talking about routers and ethernet cable (RJ-45)?????

RJ-11 will fit into a RJ-45 but a RJ-45 will not fit into a RJ-11. Translation, your telephone wire will plug into your router/computer port but your Ethernet wire will not fit into your telephone jack.

If you are working on a telephone, as long as you have dial tone on the other end, it doesn't make a big difference. You should have a polarity checker to insure proper polarity but even if it is wrong, most phones will work most of the time. Get a polarity checker at Radio Shack for about $10.00

If you are working on a router ... well, it is no wonder your network will not work. You cannot split one RJ-45 port into two "Ports" using a telephone RJ-11 splitter. Never, Never, Never, plug your router cable into a telephone jack (RJ-11). Yea, Yea, Yea, I know, I just said a RJ-45 will not fit into a RJ-11 but if you have a telephone cord pluged into the router, guess what, 60 Volts will smoke it. When the phone rings, it rings with 60+ volts and will smoke any computer device it can smoke looking for ground.

If you need more computer ports, get a bigger router or bigger switch or bigger hub or get a wireless router to accomodate your wireless devices.

I hope I have answered your question.

Thanks for your interest in FixYa.com

Feb 13, 2010 | Computers & Internet

1 Answer

Can i connect my xbox to my laptop /w pc usb


Xbox Network Connection using Hub

This is the most common network configuration and is also the easiest to setup.
Step #1: Plug your network cable(RJ-45 cable) that comes from your cable/DSL modem into the uplink port of your hub. (Make sure that your uplink is switched to "on").
Step #2: Take an RJ-45 cable and run it from one of the ports of the hub, directly to the Network Interface Card (NIC) installed in your computer.
Step #3: Take another RJ-45 cable and run it from a different port of your hub directly to your xbox.
**NOTE** A switch may be used in place of a hub with the same basic setup.**

That's it! No other network changes should be needed for this configuration. Your Xbox is now on the same network as your PC.

Xbox Network Connection using Router

This is another common network configuration.
Step #1: Plug your network cable(RJ-45 cable) that comes from your modem into the WAN port of your router.
Step #2: Take an RJ-45 cable and run it from one of the ports of the router, directly to the Network Interface Card (NIC) installed in your computer.
Step #3: Take another RJ-45 cable and run it from a different port of your router directly to your xbox.

**NOTE** In steps #2 and #3, you should not use a port that is directly beside the "uplink" port on your router, if your uplink port is being used to connect to another routing device.** If your router has a built in firewall, you will need to forward ports 8602 both incoming and outgoing to the internal ip address of your pc. Consult your device manaul for port forwarding.

That's it! Your Xbox is now on the same network as your PC

Xbox Network Connection using Crossover Cable

This is the last network configuration. For this setup you need at least one NIC card.
Step #1: Plug your USB cable that comes from your modem into your PC's USB port. This should already be done, if you have a usb modem for your current internet connection.
Step #2: Take an RJ-45 cable and run it from an installed NIC card on your PC, directly to the Xbox.

**NOTE** A crossover cable is only needed if you are connecting the Xbox directly to the second NIC card. If you have a device such as a switch, hub or router in between you should use a standard RJ-45 cable. This type of network setup also requires "Winroute©", a program downloadable from the world wide web. Consult the manual for specific instructions on how to set this up. Also if you have a USB ethernet adapter, you may use any of the setups described herein. USB ethernet adapter basically converts a USB cable into an RJ-45 cable.

That's it! Your Xbox is now on the same network as your PC.

Aug 14, 2009 | Video Game Consoles & Games

1 Answer

New microphones will not work


http://reviews.cnet.com/dvd-players/rj-tech-rj-4200/4505-6473_7-31490033.html

Aug 22, 2008 | RJ Tech RJ-4200

1 Answer

Universal remote control code for RJ-3700


I heard that no universal remotes have codes for RJ-TECH products. Also each remote has separate codes for each brand was told by another person, My remote broke as well and I found that a lot of remotes around the house had certain buttons that did different features on my dvd player. So if you have a remote which can record the infared codes for each button (Macro codes or something) that would work but I am not sure if there is a way to get the exact buttons on a universal remote to work on the dvd player. The second option is buy a universal remote from RJ-TECH if they sell them. I am just about to check for myself now, if they dont have 1 I'm buying a new DVD player cause its usesless if I cant control all the features without a remote.

Mar 19, 2008 | RJ Tech RJ-3700 DVD Player

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