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DEFINITY AUDIX System Release 4.0
System Description Pocket Reference
585-300-214
Issue 1
May 1999
Design and Operation
2-2
TN568 Circuit Pack
TN568 Circuit Pack
The TN568 circuit pack holds the systems main circuitry and performs
system’s main processing functions, including message routing,
self-diagnosis, and Alarm Origination.
Port Board Emulation
The TN568 holds the system’s voice ports. These voice ports
correspond to the voice ports on a TN754 or TN2181 circuit pack.
DEFINITY switch releases 7.1 and later recognize the TN568 circuit
pack. However, the system’s voice ports interact with the switch like the
voice ports on a TN754 or TN2181 circuit pack regardless of whether the
system is operating in native or non-native mode. For more information
about digital port emulation, see Chapter 1.
Flashware
The TN568 circuit pack uses
flashware
to store the sequences it uses to
boot the system and programs specific to the TN568. Flashware are
programs that reside on flash programmable read-only memory
(FPROMs). FPROMs are hardware that reside on the TN568 and are
protected from accidental erases or rewrites. Copies of all the active
flashware programs are also stored on the hard disk.
If the customer installs software upgrades or fixes, the new program is
transferred from a MO disk to the hard disk. When the system reboots,
the new program automatically transfers from the hard disk to the
FPROMs and replaces the existing flashware.
Hard Disk Drive
The hard disk drive stores the system’s AUDIX software, subscriber
information and voice messages.
Voice messages that customers may store on the system include voice
mail, personal greetings, automated attendants, and announcement
sets—the sets of automated, verbal instructions that compose the
system’s user interface.
The hard disk drive provides up to 100 hours of voice storage. The
system comes with a minimum of 10 hours of voice storage. Customers
can purchase additional voice storage in five-hour blocks.