User's Manual

Chapter 14: SD card management
There are two SD card slots on the control unit. They are labeled System SD and Optional SD.
System SD card slot
• An Avaya System SD card must be present in this slot at all times. This card holds copies of the
B5800 Branch Gateway firmware and configuration and is used as the control units non-volatile
memory.
• Each System SD card has a unique Feature Key serial number which is used for generating and
validating licenses entered into the B5800 Branch Gateway configuration.
• The card stores the prompts for Embedded Voicemail operation and acts as the message store for
embedded voicemail messages.
• Prior to any planned shutdown or restart of the B5800 Branch Gateway system, the current
configuration running in the system's RAM memory is copied to the primary folder on the System SD
card and to the systems non-volatile memory.
• Following a restart, the software in the primary folder is loaded by the control unit. If the required
software is not present or valid, a sequence of fallback options is used, see
Booting from the SD
Cards on page 256 for more information.
• Following a restart, the configuration file, if present, in the primary folder is loaded by the control unit.
If no file is present the system will check for a file in its internal non-volatile memory. If no copy is
found it will generate a default configuration file. See
Booting from the SD Cards on page 256 for
more information.
• Once each day (approximately between 00:00 and 00:30) the B5800 Branch Gateway will copy the
current configuration running in its RAM memory to the primary folder on the card.
• Configuration changes made using Manager are first written to the copy of the configuration file on
the card and then merged with the configuration running in the system's RAM memory.
• The write lock setting on cards in the System SD card slot is ignored.
Optional SD card slot
• A card does not have to be present in this slot for normal B5800 Branch Gateway operation. The slot
can be used for various maintenance actions.
• A card with updated B5800 Branch Gateway software or configuration can be inserted into the
Optional SD card slot and those files are then transferred to the System SD card in order to upgrade
the B5800 Branch Gateway system.
• The full contents of the System SD card can be copied to the Optional SD card while the B5800
Branch Gateway system is running.
• The write lock setting on cards in the Optional SD card slot is honored.
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