User's Manual

862-01545 µLink System Manual
Issue 1 Page 11
Maintenance
Features
a. No routine maintenance required.
b. Mean time to repair after arrival on site is less than
30 minutes, provided that the units to be repaired
are reasonably accessible.
c. Extensive self-diagnostics with software-based fault
localisation.
d. Craft Terminal diagnostics, control and
management functions are able to access any local
or remote station equipment linked by radio.
e. IU alarm display allows for simple fault diagnostics.
f. IU common to all OUs.
g. All panels and covers can be removed with one tool.
h. No special external test equipment is required to
maintain the system.
i. OU can be replaced without having to re-align the
antenna.
Built-in Test
Features
The µLink has the following built-in test features:
• LED alarm and status indicators on IU Front Panel.
• Remote unit alarms indicated similar to the local
unit’s alarms.
• Historic alarm logging (last 1000 events).
• CRC-4 error detection on user data.
• Loss of Data Input Detection.
• Loss of Frame Detection on Radio Frames.
• Automatic AIS Insertion.
• Input Data Loopback.
• Output Data Loopback.
• Payload data Output Enable/Disable function.
• Real Time Clock for time-stamping of alarm and
other events (Y2K compatible).