Meridian America Link/Customer Controlled Routing manual MVME705B transition card

74Chapter 4: Meridian Link/CCR hardware

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).

553-3202-210 Standard October 1998