The message KEYGUARD OFF is briefly displayed indicating that the keyguard has now been deactivated.

When keyguard is activated:

To answer a call, press the SEND key. During the call, the keypad remains unlocked and the phone can be operated in the normal way.

To end a call, press the END key. After the call is ended, the keyguard automatically becomes active again.

The phone can not be switched off before the key- guard is deactivated.

Note: When the keyguard is activated, calls may be possible to the emergency number programmed into your phone e.g., 911 or another official emergency number). However, one-touch emergency dialing (‘the 9 key’) does not operate.

Send DTMF (Menu 17)

You can transmit numerical information as a series of tones, using the DTMF facility (e.g. to check for messages in your answering machine). There are two ways to send DTMF tones:

Manual Dialing:

AMake the call in the usual way.

BWhen the call has been answered, enter the numbers. Each number is sent immediately, as a DTMF tone. The length of the tone depends on how long you press the key.

Automatic Dialing:

AMake the call in the usual way.

BWhen the call has been answered, use the RCL key to recall a stored ‘DTMF’ number from a memory location (e.g. for location 23, press RCL 2 3).

CTo send the whole number (displayed) as DTMF tones, press MENU SEND, or MENU 1 7. A series of tones, each tone representing a digit of the DTMF number, will be heard.

The special characters ‘+’, ‘p’ and ‘w’ are used for DTMF dialing; these are available on the * key.

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Nokia 239 manual Send Dtmf Menu, When keyguard is activated, Manual Dialing, Automatic Dialing