No dial tone on line 1 - RCA 25202RE3 Corded Phone

try changing phone to tone dialing . one phone line has been setup for Decadic dialing and the other line may be setup for tone dialing.
If tone dialing is working on one line but not the other then get phone company to change the dialing type on the phone line.
Dual tone multi frequency is the technical name for tone dialing and is more efficient than decadic dialing or pulse dialing.

try connecting line 2 to a simple phone and chk for dial tone.

CALL THE COMPANY OF THE PHONE OR CALL THE PHONE COMPANY THAT PROVIDES THE SERVCE OF YOUR PHONE

Call a tech in that handles the system programming to check the line port if ok and/or call your carrier to report the line as being dead.

If you have another phone connect it to the wall outlet to see if you get a dial tone. This will indicate if your base unit is faulty.
Check the power adapter to the base unit, make sure it is getting mains power.
If the base unit has dual phone lines and if line 1 is only connected and the line 2 has beed selected then you cannot get a dial tone. In the chase press the line 1 to get a dial tone.
If your base unit has only one line then check the phone line at the wall socket make sure it is plugged in tight, also check the the connection at the base unit.
If this does not work then ring the phone company and get the to test your phone line, you may have a faulty line to your home.

Now here's a conflict. Does line 4 work on any other phone where it doesn't ring? You say all lines are working properly wiith dial tones, tnen you say you can't pick it up from another phone.

I don't think these phones have "private lines", but the dial tone comes from the 2nd RJ-14 jack on the wall. On every phone, you could swap the plugs so that line 1 comes into line 3 and line 3 comes into line 1 (you'll lose the intercom) and see if you get dial tone on line 2 which will be the phone that works line 4. The point being to determine if you have a wiring issue or a programming problem.

Carl

Either button mapping or no dial tone at the system cabinet. If your desplay sas CO1 and you have no dial tone, go to the sytsem cabinet ans swap the modular plugs for CO1 and CO2. If the No Dial Tone moves, "mus be sumpin wrong wit yo lines".

Carl

Programming
memory buttons
External autodial
1. If you are on a call or an open line with dial tone, press Hold
or Rls
2. Press Feature * 1
3. Press a memory button.
4. Dial the external number.
5. Press Hold to store the number.
6. Label your new button.

Internal autodial
1. If you are on a call or an open line with dial tone, press Hold
or Rls
2. Press Feature * 2
3. Press a memory button.
4. Dial the internal number.
5. Label your new button.

Features
1. If you are on a call or an open line with dial tone, press Hold
or Rls
2. Press Feature * 3
3. Press a memory button.
4. Press Feature and the feature code.
5. Label your new button.

Erasing memory buttons
1. If you are on a call or an open line with dial tone, press Hold
or Rls
2. Press Feature * 1
3. Press the memory button you want to erase.
4. Press Hold to erase the button.

Please disconnect your cordless phones from telephone jacks throughout the home. The "line in use" is say that you have a short on the line, or a phone off the hook. So disconnect lines, then replug 1 corded phone in to check for dial tone. If working, continue to plug in 1 phone at a time(rechecking working one each time) to find the equipment that is causing you heartache.

my phone has a dial tone but wont dial out or recieve calls.