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It will, but you may have it programmed to not send DTMF in SYSTEM programming. Since the 7730 is backward compatible to every KX-T system Panasonic made, you need to post a model number of they phone system to get instructions.
Are you in a rotary dial phone system area? There are 3 ways to program dialing, rotary, tone, and suppressed. The 3rd one will ONLY send pulse dial and inhibits the audio. It may be that you can press # and force DTMF. In the last 20 years or so, we have never had to worry about that as our phone companies no longer charge for "touch tone".
If it dials O.K., try pressing # and see if it turns on the DTMF pad. You could have pulse dial on outside calls enabled, and that would keep the keypad in pulse mode until it's told to send tones.
This is really only a guess. The type of dialing is programmed in CO trunks and it's possible it's been set to Call Blocking! It is designed to send pulse only and block the audio of DTMF so the CO won't get confused. You might start with changing the Type Dial to DTMF and test. If that doesn't work, try Pulse and test. Last, if that doesn't work, you will need to keep call blocking and try the # after dialing.
Please comment back if it does or doesn't work. We don't see much pulse dial around here.
The cordless phones supports pulse dialing than tone now a days. If your provider supports pulse dialing & tone you can just change the tone to pulse to use cordless phone. Otherwise you have to request for pulse dialing from your provider. --------------------------------------------------------------- We appreciate your feedback; it will help us improve this Web site. Please select 'YES' if satisfied.
Here's what the manual says:
Changing the Dial Mode (Tone or Pulse Dialing)
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.
Return the handset to the base. The handset communicates the new
setting to the base, and the base activates the setting on any other
Hope this helps out.
I have a similar Panasonic phone (KX_TGA101S). Someone must have inadvertently changed the dial mode on you. Here is how you change it on mine, which should be similar to yours. Hit the Menu button. Scroll down to "Set tel line" and hit the Menu Button (OK). If it isn't displayed, scroll to "Set Dial Mode" and hit the Menu Button. Select Tone instead of Pulse and hit the Menu Button. That should do it.