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Chapter 4: Meridian Link/CCR hardware
553-3202-210 Standard October 1998
MVME705B transition card
This transition card (shown in Figure 22) provides the transceivers that
convert the I/O signals from the XCC card to the RS-232 and/or RS-422
standard for serial data communications. A 64-conductor flat ribbon cable
connects the transition card to the XCC card.
The MVME705B transition card provides three serial ports. The ports SP1
and SP3 are synchronous ports. Each of these ports can be configured
independently to support DCE or DTE. Port SP5 is the debug port used only
by Nortel support personnel; it is not used in the field.
Note: The MVME705B transition card that is shipped with the
Application Module has port SP1 (ESDI) configured for DTE and port
SP3 (host) configured for DCE. When the card is shipped by itself as a
replacement card, all ports are configured for DTE (original factory
default configuration).
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