TN1648 is an SPE component used for maintenance. A processor in
the TN1648 runs control routines that connect to maintenance software.
TN1648 has a 5-LED alarm panel and a toggle switch to manually
inhibit automatic emergency transfer of PPN analog lines.
The TN1648 provides 2 RS-232 interfaces for connection to an administration
terminal and, with duplication, connection to a standby maintenance
TN1648 also provides a tip and ring port with a built-in modem
allowing a remote administration terminal to access the system.
The circuit pack allows connection to the management terminal
and connection to and termination of 1 end of the processor bus.
Other maintenance items include:
alarm monitors and outputs including auxiliary alarms for auxiliary
equipment and environmental monitoring for over- temperature conditions
Power supply sense and control for the carriers
Emergency transfer control for catastrophic failure. The circuit
consists of a 3-position toggle switch. The switch may be moved
into the manual on position, manual off position, or automatic
Non-volatile memory containing the time-of-day clock, the initialization
and administration system (INADS) telephone number, login password,
and product identification
Alarm panel information with major, minor, and warning LEDs, an
ACKnowledge LED, and an emergency transfer LED