Stereo System User Manual

Transition Notes
A-1
System Design
DEFINITY AUDIX System Release 4.0
System Description Pocket Reference
585-300-214
Issue 1
May 1999
Appendix A — Transition Notes
The hardware design for DEFINITY AUDIX system Release 4.0 has
changed significantly from previous releases of the system. The most
important result of these changes is a 60% reduction in the space the
system requires in the customer’s switch.
The change in system size required some changes in functionality that
may impact customers who migrate from previous system releases to
Release 4.0. This appendix explains these changes in detail. For more
information about the design and operation of DEFINITY AUDIX system
Release 4.0, see Chapter 2
.
System Design
DEFINITY AUDIX system Release 4.0 uses one circuit pack, the TN568.
With its additional hardware components, including the MO drive and
the hard disk drive, the system occupies two universal port slots in the
customer’s switch.
1
Previous releases of the DEFINITY AUDIX system
used two circuit packs—either a TN566 or a TN567 multifunction board
and an alarm board. Because of this design, previous releases of the
DEFINITY AUDIX system occupied five port slots in the customer’s
switch.
Native and Non-native Support
When the DEFINITY AUDIX system operates in native mode, the switch
reserves a number of port slots for the system based on the system’s
size. DEFINITY AUDIX system releases earlier than 4.0 were five slots
wide, so switch releases that supported the system in native mode
reserved five slots for the system. Because DEFINITY AUDIX system
Release 4.0 only requires two slots in the switch, switch releases that
support the system in native mode will only reserve two slots for the
system.
1
DEFINITY switch Version 4, Version 5, and Release 6 supported
DEFINITY AUDIX system releases earlier than 4.0 in native mode.
However, only DEFINITY switch releases 7.1 and later will support
DEFINITY AUDIX system Release 4.0 in native mode.
This change mainly impacts customers who want to migrate from
DEFINITY AUDIX system releases earlier than 4.0 to DEFINITY AUDIX
system Release 4.0 for use in DEFINITY switch Version 4, Version 5, or
Release 6. Customers who use DEFINITY AUDIX system releases earlier
than 4.0 in these switches probably use the system in native mode. If
these customers migrate to DEFINITY AUDIX system Release 4.0, the
new system will operate in non-native mode.
1. The Compact Modular Cabinet (CMC) reserves one slot if the
system is installed in slot 6.