Software Increment Release Notes
================================
Increment ID:   I12A1905
Release:        AN1905
Date created:   11-28-2003
Increment Type: APU
Title: MLC failures during Protection Switching, ANX robustness
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Following is a list of issues addressed in this Increment. See below
for more details.
1. MLC failures during Protection Switching Activities
2. ANX recovery robustness
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1. MLC failures during Protection Switching Activities
* Description: Primary optic protection switching may cause the 
UE9000 to momentarily fail Multiple-circuit Line Card (MLC) circuit 
packs.
* Pre-Increment Impact and work-around: Tests have shown that action
is not required by the customer to restore service to the impacted 
lines. However, under adverse conditions (such as several UE9000 shelves 
reporting multiple MLC failures) a more controlled recovery may speed
overall system return to service. This can be accomplished by taking
all the UE9000 shelves in trouble offline, and allowing each to recover
in a serial fashion.
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2. ANX recovery robustness
* Description: Large ANX deployments (20 VM's per HDT and higher) 
have had issues where the LAIC's would both fail during different 
system actions. Such actions include the switching of processors at the
ABM shelf, committing ANX increments from ISD as well as an event that
causes the total loss of transport from the ABM shelf to the ANX systems.
This increment improves ANX robustness by: 
 - Providing CI commands which allow adjusting the number of ANX shelves
   recovered simultaneously following a ABM switch of activity, ABM 
   restart or ANX loss of communication condition. Go to ANXRECOVERY 
   command increment on the NE after applying this patch, and type 
   "HELP" for more details.
 - Changing the default number of ANXs recovered at a time after a ABM 
   switch of activity to 2. This value can also be changed from the 
   ANXRECOVERY CI tool.
* Pre-Increment Impact and work-around: Both LAIC packs could fail, 
causing a total system outage. Should both LAIC packs fail during a
swact, the loss of transport or the application of an ANX increment, 
remove the LAIC packs and place the DS1 interfaces OOS at the fwpui. 
Place the LAIC packs back in the system, and place the DS1 facilities 
back IS one at a time. 
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Increments Needed:
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Increments I01A1905 through I11A1905 need to be successfully applied
prior to application of this increment.
Loads Affected:
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After successful application of this increment, the APU loads will be:
ACCL19HI
ATBL19HI

Special Instructions:
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None.

Installation Instructions:
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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 located on the Zhone web page at
(http://www.zhone.com/support/patches/index.html), or you may request
document 830-00374-01 from your Zhone Technologies Account Manager or
Order Manager. Issues with this increment should be directed to
Zhone Global Services and Support at 1-877-ZHONE-20 (1-877-946-6320).