Carrier Access Wide Bank 28 DS3 User Manual page 61

is replaceable by itself (see Chapter 9 for replacement instructions). The MSO Relay card contains
the necessary relays to switch the traffic either to the MSO Electronics card or to the spare low-
speed card, as required. The Relay card is only replaceable when combined with the electronics card
as a unit to form the MSO DS1 or E1 card.
WARNING!
RELAY SECTION AND THE ELECTRONICS SECTION MUST BE LATCHED TOGETHER AS A
UNIT FOR ADDED STRENGTH WHEN INSERTING IT INTO THE CARD SLOT CONNECTOR
You can upgrade a non-MSO Wide Bank to an MSO system. The items necessary to upgrade to
MSO functionality are:
1. The desired number of MSO low-speed circuit cards (up to 8) to replace the standard low-speed
circuit cards.
2. A code update.
The release code for MSO support is Rev 1.47 or higher and is available for both FLASH-based
systems and EPROM-based systems. The FLASH-based systems will support software code
updates via both TFTP and XMODEM. The EPROM-based systems require a new EPROM
integrated circuit (IC) from Carrier Access Corporation. Both systems, if redundant, will
maintain live traffic and configurations while the off-line Controller is updated.
The low-speed circuit card residing in the spare low-speed circuit card position can be either a
Standard low-speed circuit card or an MSO low-speed circuit card.
Wide Bank 28 DS3 - Release 2.4
DO NOT
INSERT THE RELAY SECTION OF THE CARD BY ITSELF
July 2004
Product Description
Low-Speed (LS) Redundancy
. T
HE
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