158 S-ICX (International) issued October 2000 S-ICX-50-700Chapter 5. Key Telephone Features Section 700 - OperationFlashDescriptionYou can send a flash signal on your telephone to release an outside line and then either automaticallyreseize the same outside line or switch to extension dial tone status by pressing the FL/R or PROGkey.Trunk programming determines whether your phone reseizes the outside line or switches to extensiondial tone status.Note: The following is available for future use only: Alternatively, an extension settingdetermines if pressing a trunk key will place the call on exclusive hold or send a flash to the trunk.Hardware Requirements• N/AConsiderations• You can send a longer or shorter flash signal, depending on whether you use the FL/R or PROGkey (flash tone lengths are set for the FL/R and PROG keys through system programming).Flexible Function KeysDescriptionYou can assign frequently used functions to programmable keys on key phones, DSS/72 consoles, andEM/24 consoles. All keys not already assigned as line or speed dialling keys are available forprogramming.You can store either Fixed Feature codes or Flexible Feature codes in an FF key. (The LED of theFlexible Function [FF] key will not light when digits are stored in the key.) Fixed Feature codes arehard-coded and cannot be changed. Most features; however, can also be assigned flexible codesaccording to the System Dial Plan. This allows the flexible codes to be changed in the dial planwithout having to re-program extensions.When a flexible code is programmed into an FF key or soft key, the System translates the flexiblecode into the fixed code. You can use either the Fixed Feature code or your System’s Flexible Featurecode when programming FF keys. Table 18 on page 160 reflects both Fixed Feature codes and theSystem defaults for Flexible Feature codes.OperationTo assign Fixed Feature codes to an FF key:Action Result1. Lift the handset or press the ON/OFF key. Intercom dial tone2. Press the PROG key. F displays3. Press the FF key to be programmed. Enter Function# displays
