Zhone 2000 ユーザーズマニュアル

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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.

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

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

 

The Derived Timing debugging messages are reserved for 
use by Paradyne 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