APPEAR AS Confidential 345/352
14 MAINTENANCE
This chapter describes how to perform maintenance tasks such as software upgrades, replacing faulty modules,
etc.
14.1 SOFTWARE UPGRADES
Software can be uploaded to the unit remotely using the Maintenance Center (MC) available on port 8088 of the
unit, ie http://<ip_addr>:8088/. Refer to the Upgrade Guide for details.
Required software upgrades for the units will be provided together with instructions by Appear’s support
department.
For more details on the upgrade procedure, please refer to the Upgrade Guide document.
14.2 HOT-SWAPPING
The platform supports module hot-swapping, i.e. the different modules – power supply, fan, decoder, input, or
switch – can be replaced when the head-end is in operation, without shutting it down. In other words, removing a
module and replacing it with a new one will not damage the module. The effects of hot-swapping a module are
explained in further detail in the following sections.
14.2.1 PERFORMING A HOT-SWAP
To remove a module, first loosen the screws on the top and bottom (one screw is located in the ejector). Next,
press the white button inside the module ejector and push the ejector down. The module is now released from
the chassis.
To insert a new module into the chassis, it is important to align the module’s edges with the module-guides in the
chassis. Ensure that the jack on the module is in the open position as illustrated in the figure below. Slide the
module into the unit on the module-guides until the jack touches the chassis. Move the jack upwards. This will
insert the module all the way into the unit.
14.2.2 SWITCH+MMI MODULE HOT-SWAP
This module manages all the other modules in the unit and stores all configuration information in a database.
Replacing the Switch+MMI card will cause all services to stop. Hence replacement of the MMI board must be
performed with care, and a full backup of the configuration database is recommended.
All communication between different modules in the unit is facilitated by the switch-module; removing this
module will disable all backplane communication resulting in loss of all services (the color of the status LED on
the modules will change to blue).
Once a replacement switch card is inserted into the device the LED will change back to red or green and services
will resume automatically.
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