Nortel Networks NN43001-106 - Manual (Page 493)

Operating parameters 493
• after a trunk unit has undergone a "NEW", "CHANGE", or "MOVE"
operation using LD 14 or LD 10
There is no mechanism to indicate whether or not an IPE card is equipped
with the B34 codec. Loss plan messages are downloaded to all IPE cards
in hybrid systems, whether or not they are equipped with the B34 codec.
Typically, there are three vintages of firmware used in the field:
• non-B34 codec equipped cards
• hardcoded B34 equipped cards
• flexible B34 equipped cards
There are two versions of the flexible B34 equipped cards, a flexible
7C software compatible B34 equipped card and a flexible 8B software
compatible B34 equipped card. The hardcoded and 7C software compatible
versions of the B34 equipped cards have country-unique loss value defaults.
The flexible 8B software compatible B34 equipped card have universal B34
default loss values, which do not meet any country-specific requirements.
The flexible 7C software compatible B34 equipped card and the flexible 8B
software compatible B34 equipped card both recognize the new B34 (type
12) messages, as well as the old static pad switching (type 5) messages;
the type 12 messages take precedence. The hardcoded B34 cards only
recognize the type 5 messages.
The flexible 7C B34 equipped cards are forward compatible with the new
software; the hardcoded B34 cards are not. The flexible 8B B34 equipped
cards are not backwards compatible to systems running older versions
of software.
Operating parameters
A system must be configured with one or more IPE cards equipped with
a B34 codec and firmware supporting software downloading. It is the
responsibility of the installer to verify that the IPE cards used are compliant
with the download messages used by this feature.
XFALC (flexible analog line card) is compatible with the download messages
supporting Static Loss Plan Download.
Since the flexible 8B B34 equipped cards are not backwards compatible to
systems running older versions of software, the following upgrade strategy
should be followed:
• Systems running software Phase 7C or earlier, and upgrading to Phase
8B software, do not require the new flexible B34 IPE cards if the
transmission plan remains the same. These systems may be equipped
with a mix of hardcoded B34 IPE cards and new flexible B34 IPE cards;
Nortel Communication Server 1000
Features and Services - Book 1 of 6 (A to B)
NN43001-106 01.04 Standard
Release 5.0 27 July 2007
Copyright © 2007, Nortel Networks
.