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DEFINITY AUDIX System Release 4.0
System Description Pocket Reference
585-300-214
Issue 1
May 1999
Transition Notes
A-2
System Design
While DEFINITY switch Version 4, Version 5, and Release 6 recognized
earlier DEFINITY AUDIX system releases’ TN566 or TN567 circuit packs
as belonging to the DEFINTY AUDIX system, these switch releases will
recognize DEFINITY AUDIX system Release 4.0’s TN568 circuit pack as
a TN754 or TN2181 digital port circuit pack.
2
Because of this change,
the switch will only reserve one port slot for the system, instead of five.
The port slot the switch reserves will house the TN568 circuit pack, and
the DEFINITY AUDIX system’s other hardware components will
physically occupy a second slot.
The change from native to non-native support for the system in earlier
switch releases allows customers to benefit from the advantages of the
reduced size of DEFINITY AUDIX system Release 4.0. For more
information about these advantages, see Chapter 1.
Voice Ports
DEFINITY AUDIX system Release 4.0 supports a maximum of 12 voice
ports without digital networking or 8 voice ports with digital networking.
Previous releases of the DEFINITY AUDIX system supported a maximum
of 16 voice ports without digital networking or 12 voice ports with digital
networking.
Administration Impacts
The DEFINITY AUDIX system will operate in native mode in DEFINITY
switch releases 7.1 and later. These switches will know that the
DEFINITY AUDIX system’s maximum capacity is 12 voice ports, and that
is the maximum number of voice ports these switches will allow
customers to administer for the system.
If the DEFINITY AUDIX system operates in non-native mode, however,
the system must emulate an 8-port or 16-port circuit pack. The system
cannot emulate a 12-port circuit pack.
When previous releases of the DEFINITY AUDIX system operated in
non-native mode, system administrators or technicians were required to
administer the maximum number of voice ports the switch would allot for
the system—either 8 or 16. If, for example, a customer purchased 4
voice ports, but the DEFINITY AUDIX system emulated a TN2181
16-port circuit pack, the administrator or technician had to administer all
16 ports the switch would allow for the TN2181, even though only 4 of
the voice ports were active on the DEFINITY AUDIX system.
A similar rule applies to Release 4.0. When the DEFINITY AUDIX system
operates in non-native mode, the system administrator or technician
2. Lucent Technologies recommends emulating a TN2181 circuit
pack in DEFINITY switch versions 2 and later to facilitate system
expansion.