I have no dial tone on any of the five phones that I have.

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.

Resetting the voice message waiting indicator
When you receive a new voice mail message, the new message LED on the top of the handset flashes. In the event your message waiting light gets out of sync with your phone company's
voice messaging system, you can manually reset it back to the "No messages waiting" state.
1. Press and hold FiND on the base for five seconds.
Note: The handsets connected to the base will start to beep, however, keep pressing for five seconds.
2. A beep sounds and the message alert tone is reset.
Changing the dial mode
Your phone can communicate with the telephone network in two different ways: tone dialing or pulse dialing. These days, most base networks use a method called tone dialing, so your phone comes programmed for tone dialing. If your phone company uses pulse dialing, you will need to change your phone's dial mode. If you don't get a dial tone or can't connect to the telephone network, please follow the steps below to modify your phone's settings:
1. Press MENU/SELECT.
2. Select the Global Setup menu, and then the Dial Mode submenu.
3. Scroll to highlight Pulse.
4. Press MENU/SELECT. You will hear a confirmation tone.
If you ever need to change the dial mode back to tone dialing, follow the same procedure, but select Tone in step 3.

Finally for future ease of use, here is a link to the user manual were I copied the above information from:

http://www.uniden.com/content/ebiz/uniden/resources/ownersmanuals/DECT1580-3om.pdf

A TD system is a DIGITAL phone system and the 7730 phones are ANALOG. I don't know what X means, but I guess they're not from the US :-). Anyway, the ANALOG phones need 4 wires to work, instead of the 2 that the digital phones have. If your installer was lazy and didn't cross-connect 4 wires at the frame or put in 4 bridge clips on each jumper, then you don't have a voice path. Or, XDP is turned on and you'll have a bit of a problem.

If you have an IM and a PM for the TD system, you can find the wiring diagram and the instructions to read the XDP status. Quick answer is the first 2 of every 3 pairs will run to your phone. If you start with a digital phone in the port first, turn on XDP and plug a single line set into the XDP port, you will get dial tone (may have to dial 390 or 391 to enable/disable the XDP twinning) and that dial done will be different from the digital phone. If you don't get dial tone, your first pair wiring is missing. Fix that, turn off XDP and you 77xx series phone will now work in the port.

Carl

I would contact your phone provider. It could be a coinceidence that the dial tone stopped working.
DSL does not require dial tone to work.

Here's what the manual says: Changing the Dial Mode (Tone or Pulse Dialing) (HS1 only) Your phone can communicate with the telephone network in two different ways: tone dialing or pulse dialing. These days, most phone networks use a method called tone dialing, so your phone comes programmed for tone dialing. If your phone company uses pulse dialing, you need to change your phone's dial mode. If you don't get a dial tone or can't connect to the telephone network, follow the steps below to modify your phone?s settings: With the phone in standby, press and hold [cid/menu]. Press [vol/ / ] to move the pointer to select DIAL. Press [select/channel] to set the phone to pulse dialing. Press [end]. Return the handset to the base. The handset communicates the new setting to the base, and the base activates the setting on any other handsets. Hope this helps out. K

Have the same problem... whats the way out for this?

The problem is possibly the keypad on the phone. Try another phone , preferrably a standard corded phone. If you still cannot break the dial tone, then the problem is with the telephone line (phone company)

Lisa, If the 900MHZ phone is Model 26928M programming for rotary dial usually goes like below, can't hurt to try on any model. TONE/PULSE DIALING This adjustment allows you to select tone (touch-tone) or pulse (rotary) mode dialing. The phone is pre-set for touch-tone use. To set to tone or pulse dialing: 1. Press and hold the program button for two seconds. You will hear a beep. 2. Press the *tone button to select Tone Dialing or press #pause to select Pulse Dialing. 3. Press the program button again. You will hear a confirmation tone.

do not disturb feature has to be disabled