Software Increment Release Notes
================================

Increment ID:  I29A1730
Date created:  April 16, 2001


Title:
------
TXC and Time of Day Clock Enhancements


Effect on Traffic / Warnings:
-----------------------------
This increment has no effect on traffic.


Detailed Description of Increment:  
----------------------------------
Issue 1 - Loss of signal causes freerun to holdover on the Timing and 
Cross-Connect Card (TXC).

This increment corrects the issue where the TXC enters freerun and then holdover 
mode after a loss of signal. The TXC should only enter into freerun mode.

Issue 2 - Prevent non-timing DS1's from sending the TXC into holdover mode.

This increment corrects the issue where all DS1's provisioned to an Access Node with 
their PM's turned on will cause the TXC to go into holdover mode if the PM threshold 
is exceeded. This should only occur on the DS1 that is the primary timing source.

Issue 3 - Time Of Day (TOD) clock software revision. 

This increment corrects a TOD clock software issue that could potentially 
cause problems with the Maintenance Interface Card (MIC) and the processors 
over time. 


System Configuration / Shelf Type Requirements:
-----------------------------------------------
This increment must be applied to all AN17.30 AccessNode configurations
and shelf types.  This increment affects the APU.


Prerequisite Increments Required:
---------------------------------
Increments I01A1730 through I28A1730 must be successfully applied prior to 
application of this increment.


Loads Affected:
---------------
APU: ACCL17AS


Special Instructions:
---------------------
None Applicable


Installation Instructions:
--------------------------
Please refer to the Incremental Software Delivery Users Guide for general 
installation instructions.  This document may be obtained from either the 
AccessWeb ISD web site (https://www23.nortelnetworks.com/ACCESS_OPTICAL/esd/),
where the AccessNode increments are located, or you may order it through your 
Nortel Account Manager or Order Manager.  The document number for the 
Incremental Software Delivery Users Guide is P0934362.


Test Instructions:
------------------
Issue 1 - Loss of signal causes freerun to holdover on TXC.

Testing of this issue in a live office may affect traffic and is 
not recommended.

Issue 2 - Prevent non-timing DS1's from sending the TXC into holdover mode.

Monitor the PM's of all non-primary DS1's. If any exceed the threshold 
then verify that the TXC is not in holdover.

Issue 3 - Time of day clock points to wrong register.

No testing is required.