02/99 IPN: 409-20400-02 172 To clear ‘do not disturb’, enter ıııı49ıııı using the keypad, or press the Clear key ( ).The “QUIET ” message is removed, and the radio returns to the mode it was in previously.Note: With ‘do not disturb’ enabled, it is still possible to make calls by dialling numbers usingthe keypad.Economy ModeThe T2040II incorporates an economy mode, which is activated after a pre-determined periodof inactivity. Some internal circuitry and the back-lighting for the display, function and channelkeys is turned off, to conserve battery power.To restore power:1 Operate any of the front panel controls or the PTT key.2 If the radio receives a call, the radio is restored to full activity.Short Data Messages (SDMs)Your T2040II radio can be used to receive and send Short Data Messages (SDMs). Forexample, numeric reference codes and alphanumeric status text can be sent betweenT2040II radios.Receiving an SDMAn incoming SDM is put in the call queue and the message “ M” appears on the left of thedisplay, with the callers identity on the right. The STATUS indicator illuminates and the ALPHA -NUMERIC indicator flashes.1 Press the Alphanumeric key ( ) to view the message. If an SDM contains morethan eight characters (the amount that can be displayed at one time), the UP and DOWNindicators illuminate, indicating that you can use the Up and Down keys ( / )to scroll through the whole message.2 To clear the message, press the Clear key ( ).3 Press the Alphanumeric key again to return the radio to its previous state.Note: An SDM will be displayed only if your radio firmware supports short data messaging.