User manual

Wide Bank 28 DS3 - Release 2.4 July 2004 2-25
Product Description
Low-Speed (LS) Redundancy
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! DO NOT INSERT THE RELAY SECTION OF THE CARD BY ITSELF. THE
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.