I need the pinout for the Avaya 2400 series telephone headset RJ-11 Jack.

The fax machine can't detect a dial tone (from a POST line). Since the Pixma MX420 doesn't have a handset, you may need another telephone to check your line. First, make sure that the telephone cord to the wall jack is connected to the RJ-11 port marked L. This is the lower of the two ports on the all-in-one printer. If the cord is in the wrong spot, swap the connection. That could solve the issue. If you have a telephone plugged into the upper RJ-11 port, check if you hear a dial tone. (Connect your test phone here if you haven't had one connected and check for the dial tone.)

Next, unplug the RJ-11 line cord and plug it directly into your test phone. Do you hear a dial tone? If you do not hear a dial tone, try a different RJ-11 cable. If the problem is solved, connect this cord to the lower port on the MX420 and see if the fax continues to give the "offline" message. If you still have no dial tone, take your test phone to another jack and try again. Find your incoming phone service box and check if that has a RJ-11 jack. If it does, you can test for a dial tone there. If the box doesn't have a RJ-11 port, you can have your telephone provider check the service.

If there is no dial tone at the service box, then your telephone company will fix the external problem for free. (With copper telephone service, sometimes rodents damage the wires. The provider has to fix this.) If you had a dial tone at the service box or another jack, then you have an internal wiring problem. This could be at the jack or inside a wall. If you take off the outlet cover, you'll find the wiring for the jack. This will either have screws holding down the stripped ends of the conductor wires or a punch-down keystone (with un-stripped wires). For the jack with the screw terminals, determine if any wire is loose/broken and strip a new section of wire. Then re-secure the wire under the correct screw. See http://www.lanshack.com/wire_phone_jack.aspx for a diagram. For the punch-down keystone, you'll need a special tool to reconnect the conductor wire. This tool is available at most hardware stores in the electrical wiring section.

If the problem isn't at a jack, you'll have to try to find the broken wire and replace the wire. Your telephone company's service technician will fix the problem for a fee.

If you have an internet connection with a DSL filter, you should check if the filter is damaged. This can lead to the above problems. If you have switched to a VOIP service, you'll need to make sure that it is compatible with the POST connection for the fax machine.

I hope this helps.

Cindy Wells

It should.

RJ45 pinout link here:
RJ 45 pinout
Hope this helps.

you try form USB or LAN interface \\Ethernet connection (recommended)

1. Plug one end of the RJ-11 telephone cable into an unfiltered telephone wall jack (enabled for Sympatico High Speed Internet service).
2. Plug the other end of the RJ-11 telephone cable into the DSL port on the back of the modem.
3. Plug one end of the RJ-45 Ethernet cable into your computer's Ethernet port.
4. Plug the other end of the RJ-45 Ethernet cable into the Ethernet Port 1 on the back of the modem.
5. Insert the rounded end of the power adapter into the Power port and the dual-pronged plug end into your power outlet.
6. Press the power button to turn on the modem.

USB connection

1. Plug one end of the RJ-11 telephone cable into an unfiltered telephone wall jack (enabled for Sympatico High Speed Internet service).
2. Plug the other end of the RJ-11 telephone cable into the DSL port on the back of the modem.
3. Plug the small, square end of the USB cable into your computer's USB port.
4. Plug the wide, flat end of the USB cable into the USB port on the back of the modem.
5. Insert the rounded end of the power adapter into the Power port and the dual-pronged plug end into your power outlet.
6. Press the power button to turn on the modem.

First, we want to clarify that the headset connection is an RJ9 (RJ11 is the phone cable to the wall and the clip is larger). Plantronics doesn't make any such adapter but it is available online, just type "converter rj to 3.5mm" and you should get some leads to check out.

Good luck from Headsets Direct - 800-914-7996.

Before you change anything - is this a new device you are hooking up or had this thing worked in the past? First thing to do is reboot everything starting with the modem and ending with the computer at the end of the line. Wait at least 30 seconds between each device. Review all the connections - everything plugged in where it should be? (this is of course your question - see more below).

Eithernet connections (plugs) are RJ-45. The RJ-45 looks like a RJ-11 (telephone jack) only bigger. Typically, the RJ-45 will not fit into the RJ-11 AND SHOULD NOT. Why? Your Cat 5 eithernet runs on very low voltage and signal (packet switching). If you succedssfully get the RJ-45 CAT 5 cable into the RJ-11 phone jack, when the phone rings, you will be sending 60 volts into your network. Can you spell "Do I smell smoke?" A RJ-11 will have up to 6 wires (one pair or two pair or three pair) in the jack and up to 6 'buds' on the RJ-11 plug. A RJ-45 will have 8 wires (in the jack) and 8 'buds' on the plug of your cat 5.

Your device may say DSL on the Cat 5 connection - count the wires inside or the jack.

There are other Cat 5 connection types, punch down and terminal screw types, I dont think you are talking about either.

On your AT&T modem, you should find a RJ-11 which will attach to a near by telephone jack and a RJ-45 for your Cat 5 cable. Your modem may also serve as a router and as such would have additional RJ-45 ports. I suspect you are using a separate router for your home network. As such, one of the ports on the router should be marked Internet or Upload or maybe it is a special color or is set aside from the other ports. That special port will be connected to your modem and your other computers will use the other, lesser ports.

Of course, you could call your service provider for clarification also.

Thank you for your question @ FixYa.com - I am sorry you are having this trouble and I hope I have helped you in some way. I hope you are able to get your system back up in short order.

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Does another phone work at that jack? Try a different phone cord (RJ-11). I like to use a simple older phone for testing. Do any of the other jacks work?

Find where your telephone service comes in and open the box. If you are lucky, you will find RJ-11 jacks in the box. Test for dial tone there. If there is no dial tone, contact your provider and have them fix the line. (If the service box doesn't have an RJ-11 plug, you will need the provider to test the incoming phone line.)

If the problem is only at the one jack, open up the outlet box and check for loose or broken wires. Some use a screw connection; others use a keystone jack (which requires a special tool to press the wires into the connection). For the screw type, you strip the insulation on the individual strands. The keystone has teeth to penetrate the insulation so don't strip it back. http://www.lanshack.com/wire_phone_jack.aspx shows how the jack should be wired.

If none of the inside jacks work, you need to check any exposed wiring for damage. After that you need to check the wiring inside the walls. Your telephone provider will fix this for a fee.

I hope this helps.

Cindy Wells

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

Those two jacks are telephone jacks (RJ-11) not ethernet (RJ-45). The jack marked telephone is for a phone, and the jack with a rectangle symbol is for the telephone line into the wall.

You need to buy an ethernet PCI card - without one you can not use a cat5e line (which has an RJ45 connection).

No, that was a drawback of the 44xx series phones. You should use a Polycom conference phone for a conference phone.