Red light flashing "line in use" and unable to receive calls

Unplug the line cord. While holding down the * and # keys, plug the line cord back in. Release the * and # keys.

Follow the directions on-screen, which will test all display modes, buttons, and sounds for both red and green colored LEDs.

If the feature button continues to flash, press it and then lift the handset and hang up.

With the DSL light always flashing, it means that either the ADSL signal (synchronization) does not reach your modem, or your modem cannot 'read' the signal.

You need to determine if the problem is from one of the following places :

• outside of your house (your land line or ISP equipment) or from the modem;
• your telephone-cable inside your house or
• one of your equipment;

Try the following manipulations to determine from where the default comes :

1. Determine if the problem is in your house or on the land line
   
   • Unplug each and every equipment which is connected to your telephonic installation (Fax, phones, answering machines etc);
   • Using the shortest telephone cable (RJ11) you possess, plug only your modem to the main telephone jack of your house.
   • If the DSL LED still flashes continuously, the problem is somewhere between your ISP's equipment and your house. You should call them and expose the situation. At this stage, you can't do much else.
   
   
2. Determine if the problem is in your house installation
   If the DSL LED lights up when it is plugged to the main telephone jack, then it is either one of your equipment which is at fault, or the house installation. To pinpoint the problem, do the following :
   
   • With all the other equipment still unplugged, try the modem on all the other telephone jacks you have around the house.
   • If the DSL flashes continuously on one of the jacks, you will have found the source of your miseries. Depending on your ISP's terms and conditions, you will either have to call them of call for the services of a third-party technician to solve the problem.
   • If the DSL lights up correctly on all the telephone jacks, then your house telephone installation is good. Proceed to the next series of tests.
   
   
3. Determine which equipment is at fault
   
   • Plus your modem to one telephone jack and wait for the DSL line to light solid.
   • Use a splitter (ADSL filter) to plug the equipments you possess (telephone, fax etc) one by one. Verify each time if the DSL LED is still lit or flashes continuously.
   • If one of the equipment causes the DSL LED to flash, it is that equipment which causes your problem.
   • If every equipment causes the DSL LED to flash, the it is the splitter (ADSL filter) which is causing the problem. You can confirm this hypothesis by testing each and every ADSL filter you have in your possession.
   • Replace any faulty equipment and you should have eliminated the problem.

If nothing of this solves your problem, you won't have any choice but call you ISP. Don't hesitate to tell them all tests you will have done.

May I also make some recommendations :

1. Use a power surge protector (not a UPS though) to plug your modem to the electric outlet BUT plug it directly to the telephone jack;
2. Make sure your modem is plugged in as far as possible from UPS, television, etc.;
3. If possible, don't plug the modem in the same electric outlet as other equipments;
4. Don't use any telephone extension cable to plug your modem to the telephone jack.

Hope this helps you. Let me know what happens next.

What color is the flashing light? Green is an intercom call and red is a call from an outside line. First try a new phone line cord and check if you have a bad cord. Do you have dial tone at other phones/jacks in the building? Unplug the extension line and plug in a known working phone. The phone needs repair if the your alternate phone works. If the second phone doesn't work at the jack, then the problem is in the wiring (at the jack or in the rest of the wire run) or in the Phone system. Depending on the jack, you can open it up and determine if there are any loose/broken wires. A cable tester that can do telephone lines (RJ-11) will help (some of these will handle power on the cable so check the specs for your phone system). If the jack uses a keystone, you will need to open it up and press the wires back down with the appropriate punch-down tool. You may want to pull the wires up and press them down at a different point (closer to the outlet box).

If none of the phones work then it is the phone system or the wiring coming into the building. I do not know if you can get to the service box and plug in a phone there. If there is no dial tone at the service box, get the phone company to fix it. If the problem is the phone system, you will have to consult a service person who knows more about the system.

I hope you find the problem to be simple, like a bad cable.

Cindy Wells

First check to make sure that the phone line is working. Unplug the telephone cord from teh telephone (Do not unplug it from the wall as you will want to make sure the telephone cord is good also) Plug in another phone and see if it works, if it does the problem is the phone, if it doesnt the problem is either the telephone cord, or the wiring in the wall or the jack.

Step one: Check the fax number
Make sure the fax number is correct; include any numbers that you have to dial to use the telephone, such as an area code, access codes for outside lines or long-distance services, and so on. If you have to dial a particular sequence of numbers to make a telephone call from that telephone line, you also have to dial that sequence of numbers to send a fax.
If the issue is resolved, you do not need to continue troubleshooting.
If the number is correct, continue to the next step.
Step two: Dial the number manually
Instead of using a speed dial setting or sending the fax from the computer, dial the number manually from the product control panel.
If the fax sends when you dial the number from the control panel, follow these steps to recreate the speed dial setting and insert pauses in the number.
On the product control panel, press the Setup button.
Press the Left Arrow button ( ) or Right Arrow button ( ) until Speed Dial Setup appears on the control panel display, and then press the OK button.
Press the Left Arrow button ( ) or Right Arrow button ( ) until Individual Speed Dial appears on the control panel display, and then press the OK button.
Press the Left Arrow button ( ) or Right Arrow button ( ) to select an unassigned speed dial entry, and then press the OK button.
Use the product keypad to enter any numbers that must be inserted before the fax number, such as an area code or access codes for outside lines or long-distance services, and then press the Redial/Pause button to insert a pause.
Enter the rest of the fax number, using the Redial/Pause button to insert pauses between the numbers, and then press the OK button.
Enter the name of the speed dial setting, and then press the OK button to save the speed dial setting.
Try to send the fax again.
If the issue is resolved , you do not need to continue troubleshooting.
If the issue is not resolved , continue to the next step.
Step three: Run a fax diagnostic test
Press the On button ( ) to turn on the product, and then make sure the product is correctly connected to the telephone jack.
Make sure that there is plain white paper in the input tray.
On the product control panel, press 6 , and then press 6 again.
This selects the Tools menu and then selects Run Fax Test .
The fax diagnostic test page prints.
Review the results of the test.
If the result of the fax diagnostic test is All Pass , skip to Step four: Reinitialize the fax.
If the result of the fax diagnostic test is a failure, a page prints that describes the issue and offers possible solutions. Follow the solutions on the printout.
If the solutions on the printout resolve the issue, you do not need to continue troubleshooting.
If the solutions on the printout do not resolve the issue, continue to the next step.
Step four: Reinitialize the fax
While the product is on, disconnect the power cord from the back of the product and from the electrical outlet.
Make sure that the telephone cord is fully inserted into the port labeled 1-Line on the back of the product.
Connect the power cord to the back of the product, and then connect the power cord to the electrical outlet.
When the product is in the ready state, try to send and receive a fax again.
If the issue is resolved , you do not need to continue troubleshooting.
If the issue is not resolved , continue to the next step.
Step five: Test the send/receive functions
Use the product keypad to send a fax. Watch the product control panel display and listen to the sounds the product makes.
If the product is working correctly, the following events occur.
When the product begins to dial, a dial tone is audible, followed by the sound of the product dialing. A Dialing message appears on the control panel display.
When the receiving fax answers the call, the product and the fax exchange tones. A Connecting message appears on the control panel display. During this phase, the product and the fax compare capabilities, exchange information about how to send the fax, and try to establish a reliable transmission speed.
After the connection is established, the product sends the pages of the document. Messages appear on the control panel display that indicate the status, such as Sending page 1 .
Review the results of the fax.
If the fax is transmitted successfully, continue to the next step.
If there is no audible dial tone or the receiving fax does not answer the call, try sending the fax to a different destination. If this second attempt also fails, continue to the next step.
If the receiving fax answers the call and begins beeping, but the Connecting message does not appear on the product control panel display, the product is not detecting the tones from the receiving fax. Continue to the next step.
Step six: Use an analog telephone service
HP Fax and All-in-One products are designed to work with analog telephone services and might experience some difficulties when they are connected to phone lines with digital services. Make sure the product is connected to an analog telephone service.
To obtain digital services information or support, contact the telephone service provider or system administrator.
Step seven: Check the phone cord and fax connections
Disconnect the telephone cord, and then examine the connector on the end of the cord. Make sure the cord only has two wires.
Figure 1: Telephone cord with two wires
Figure 2: Telephone cord with four wires
If the cord has four wires, replace it with a two-wire telephone cord.
If you must use a cord with four wires, use the converter that shipped with product. The converter allows a cord with four wires to work with a device that requires a cord with two wires.
Make sure the fax is connected directly to the telephone jack by a telephone cord. Connect the cord to the 1-Line port on the back of the product.
Figure 3: Fax only
1 - Telephone jack
2 - Telephone line
3 - 1-Line
4 - 2-Ext
If other devices need to use the same telephone jack, make sure they are connected to the 2-Ext port on the back of the product.
Connect a single-line telephone to 2-Ext , and then pick up the receiver and listen for a dial tone. Make sure you are able to dial out using the telephone keypad. If you hear a dial tone and are able to dial out using the phone, the product is properly connected to a working telephone cord and telephone jack.
Figure 4: Fax and telephone
1 - Telephone jack
2 - Telephone line
3 - 1-Line
4 - 2-Ext
5 - Telephone
Figure 5: Fax and PC or modem
1 - Telephone jack
2 - Telephone line
3 - 1-Line
4 - 2-Ext
5 - PC or modem
If you change any cable connections, try sending and receiving a fax again to make sure that the issue is resolved.
If the issue is resolved , you do not need to continue troubleshooting.
If the issue is not resolved , continue to the next step.
Step eight: Remove any other devices from the telephone line
If any other devices, such as a telephone, an answering machine, or a modem, are connected to the telephone line, remove each device.
NOTE: Remove each device even if it is in another room, connected to another telephone jack, or connected using a line splitter.
Connect the product to an analog telephone line by connecting one end of the two-wire telephone cord directly to the telephone jack and then connecting the other end of the telephone cable directly to the 1-Line port on the back of the product.
Try to send a fax again.
If the issue is resolved , you do not need to continue troubleshooting.
If the issue is not resolved , continue to the next step.
Step nine: Perform a partial reset of the product
A partial reset of the product returns all fax settings to the default values. It might be necessary to reset the language and country/region settings after the partial reset is complete.
Disconnect the power cord from the back of the product.
Wait 20 seconds, and then press and hold # and 3 on the product control panel.
Connect the power cord to the back of the product, and then release the buttons when the product turns on.
The product is reset to factory defaults.
Try to send and receive faxes again. If the problem still exists, continue to the next step.
Step ten: Service the product
If you have completed all the steps listed above and are still experiencing a problem, service the product.

unplug everthing from all jacks in the house. call your # a couple of times. if the line rings, plug everything in 1 at a time, but call again after each hook up. if the line goes dead or is busy, that phone you just plugged in is the problem. [ a short in the phone, computer, answer machine, or any piece of equipment plugged into the phone line.] if the line is busy when everything is unplugged, call your phone company. there maybe a problem with your inside wire.there also maybe a box [called a nid] inside your basment/garage or on the side of your house, where you can plug your phone directly in, bypassing all the jacks in your house
hope this helps.
wg

You probably have the telephone cord patched into the wrong jack. Make sure it is plugged into the jack marked "line." If the problem persists, try doing this: 1. Unplug the power cord and the telephone line cord. Then wait for 30 sec or so before 1st plugging in the powercord. Wait until the display reads the currently set time, then plug the telephone line cord into the jack marked "line."

Okay, this is what happens when you put your USB cable into the external device jack next to the telephone line jack (instead of the USB port). Once you plug the stuff in correctly, the problem goes away.
Flauren (original Author on another w eb s ite)

Each telephone must be connected to line 1 and line 2 for
proper operation. The remaining lines 3 and 4 may — or may not —
be connected to each station as you desire. First plug in the battery, then the phone lines (1 & 2 are mandatory), and third the power cord. If your intercome LED is blinking red and green, then press: STORE IN, followed by "INTERCOM" followed by a free intercom# (i.e., any of the memory buttons 1 through 16 not already assigned to another telephone set). Then wait for the phone to go through its initiation sequence during which it searches each of the four possible lines. After that concludes, you should get dial tone on your active lines. :-) Marco

Have you tried plugging a different (ordinary)phone in to see what happens? It is possible that either your phone line or your voicemail system is misconfigured. If it helps, here is a link to the phone's manual: http://ec1.images-amazon.com/media/i3d/01/A/man-migrate/MANUAL000043098.pdf