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the time and date are recorded in the system log.
The real time clock is used to set the time and date when the unit is started, but then its own time and date is maintained, unless a
change to the time and date parameters occur, when it will be updated to the new settings.
The system can set or correct its system clock from information received from an SNTP Time Server. More specifically it supports
SNTP V4 and also Microsoft Windows Time (W32Time), which means that it supports NTP V3.
The user can enter the IP address of the SNTP server to be used, the default address is 000.000.000.000, which indicates to the
system that no SNTP server has been defined, and therefore SNTP is disabled.
If an SNTP server is defined, and it fails to respond, then an SNTP Server Timeout alarm will be raised. This alarm will be de-
asserted either when an SNTP response is received, or the SNTP functionality is disabled.
Redundancy Modes
Redundancy Overview
Gives a general overview of redundancy operation.
Control Network Redundancy
Gives an overview and describes the operation of the Control ports. Information is given relating to the Automatic Redundancy
Mode.
Data Network Redundancy
Describes the data redundancy modes in some detail.
Redundancy Overview
Redundancy Switching
The Video Processor can provide chassis level and card level redundancy. This feature is provided with the use of an external
controller, e.g. nCompass Control (nCC).
A failure that requires a redundancy switch will be signalled by means of a critical alarm. There are two different critical alarm levels,
card critical alarm
and
chassis critical alarm
.
The user can define an alarm that can be isolated to a single option card as a card critical alarm, if they want the assertion of this
alarm to cause a card redundancy switch. It is not possible to define an alarm that cannot be isolated to a single option card as a
card critical alarm. If the assertion of such an alarm is required to trigger a redundancy switch the user must set it as a Chassis
Critical Alarm.
Card Critical Alarm
If a Card Critical alarm is asserted, nCC will:
Determine which option card the alarm is associated with.
Identify all the outputs from the chassis that are affected by the failed card.
Determine the hardware and license keys required to generate the affected output(s), and identify suitable spare resources
within the system (this must be a suitable spare card in a different chassis).
If suitable spare resources are found, configure the spare to generate the failed outputs.
© Ericsson AB 2011. All rights reserved
© Ericsson AB 2011. All rights reserved
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