Configuring Hook Flash
                                            The following procedure describes how to configure various hook-flash features.
                                            
                                                
                                                
                                                
                                                
                                                    |  | ➢ | To configure hook-flash features: | 
                                            
                                            
                                                
                                                
                                                
                                                
                                                    |  | 1. | Configure the digit pattern used by the Tel side to indicate a hook-flash event: | 
                                            
                                            
                                                
                                                
                                                
                                                
                                                    |  | a. | Open the Supplementary Services Settings page (Setup menu > Signaling & Media tab > Gateway folder > DTMF & Supplementary > Supplementary Services Settings). | 
                                            
                                            
                                                
                                                
                                                
                                                
                                                    |  | b. | In the 'Hook-Flash Code' (HookFlashCode) field, enter the digit pattern. | 
                                            
                                            
                                                 
                                            
                                            
                                            
                                                
                                                
                                                
                                                
                                                    |  | 2. | Configure the hook-flash transport type: | 
                                            
                                            
                                                
                                                
                                                
                                                
                                                    |  | a. | Open the DTMF & Dialing page (Setup menu > Signaling & Media tab > Gateway folder > DTMF & Supplementary > DTMF & Dialing). | 
                                            
                                            
                                                
                                                
                                                
                                                
                                                    |  | b. | From the 'Hook-Flash Option' (HookFlashOption) drop-down list, select the required transport type. | 
                                            
                                            
                                                 
                                            
                                            
                                            
                                                
                                                
                                                
                                                
                                                    |  | 3. | To configure the period by the device for detecting hook-flash initiated by analog interfaces: | 
                                            
                                            
                                                
                                                
                                                
                                                
                                                    |  | a. | Open the Analog Settings page (Setup menu > Signaling & Media tab > Gateway folder > Analog Gateway > Analog Settings). | 
                                            
                                            
                                                
                                                
                                                
                                                
                                                    |  | b. | Configure the following: | 
                                            
                                            
                                                
                                                
                                                
                                                
                                                    |  | ◆ | 'Min. Hook-Flash Detection Period' (MinFlashHookTime): Defines the minimum time (in msec) for detection of a hook-flash event from an FXS interface. Detection is guaranteed for hook-flash periods of at least 60 msec (when configuring the period to 25). The device ignores hook-flash signals lasting a shorter period of time. | 
                                            
                                            
                                                
                                                
                                                
                                                
                                                    |  | ◆ | 'Max. Flash-Hook Detection Period' (FlashHookPeriod): 	Defines the maximum hook-flash period (in msec) for Tel and IP sides for FXS and FXO interfaces. For more information, see the Tel Profile parameter 'Flash Hook Period'
in Configuring Tel Profiles. | 
                                            
                                            
                                                