2000-A2-GB20-10 - 46 - February 2004SettingDerivedTimingOptionsUse the Derived Timing options to enable and disable Derived Timing, andto debug Derived Timing.To configure set derived timing settings, type T (Telephony ClockRecovery) on the Main menu. (The Telephony Clock Recovery menusupports both Derived Timing (software clock aging), and Network TimerReference (hardware clock alignment), available on some IADs.The IAD displays the Derived Timing menu:Type the option for the task you want to perform, and proceed to thesection following.Enabling and Disabling Derived TimingWhen Derived Timing is enabled, the IAD adjusts its clock source basedon the arrival rate of voice packets.To enable or disable derived timing, follow these steps:1. Type 1 to select Enable/Disable Derived Timing.The IAD displays the current setting and prompts you to change it:Derived Timing Feature is currently DISABLED.Enable now? [Y.]2. Type Y to change the current setting.The IAD saves the configuration and then displays the Derived Timingmenu.3. Press Escape to return to the Main menu.4. Reset the IAD (page 14).Enabling and Disabling Derived Timing Debug MessagesWhen you enable Derived Timing debugging, the IAD displays specificDerived Timing debug messages.To enable or disable Derived Timing debugging, follow these steps:1. Type 2 on the Derived Timing menu. The IAD displays the DerivedTiming Debug menu.*******************************************Derived Timing*******************************************1. Enable/Disable Derived Timing2. Enable/Disable Derived Timing Debug MessagesNOTE The Derived Timing debugging messages are reserved foruse by Paradyne network engineers.* ******************************************Derived Timing Debug*******************************************Derived Timing debug not enabled1. Enable/Disable *ALL* Derived Timing Debug Messages2. Enable/Disable *PSTN ONLY* Derived Timing Debug Messages3. Enable/Disable *Local Clock ONLY* Derived Timing Debug Messages
