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NetEngine IAD User Guide
Administration 48
Setting
Derived
Timing
Options
Use the Derived Timing options to enable and disable Derived Timing, and
to debug Derived Timing.
To configure set derived timing settings, type T (Telephony Clock
Recovery) on the Main menu. (The Telephony Clock Recovery menu
supports both Derived Timing (software clock aging), and Network Timer
Reference (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 the
section following.
Enabling and Disabling Derived Timing
When Derived Timing is enabled, the IAD adjusts its clock source based
on 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 Timing
menu.
3. Press Escape to return to the Main menu.
4. Reset the IAD (page 15).
Enabling and Disabling Derived Timing Debug Messages
When you enable Derived Timing debugging, the IAD displays specific
Derived 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 Derived
Timing Debug menu.
*******************************************
Derived Timing
*******************************************
1. Enable/Disable Derived Timing
2. Enable/Disable Derived Timing Debug Messages
NOTE
The Derived Timing debugging messages are reserved for
use by Verilink network engineers.
*******************************************
Derived Timing Debug
*******************************************
Derived Timing debug not enabled
1.
Enable/Disable *ALL* Derived Timing Debug Messages
2.
Enable/Disable *PSTN ONLY* Derived Timing Debug Messages
3. Enable/Disable *Local Clock ONLY* Derived Timing Debug Messages