Nortel Networks Video Gaming Accessories 553-3001-211 Manual De Usuario

 NT6D80 MSDL card

Equipment emulation mode – Configure an MSDL port to emulate DCE or 
DTE by setting switches on the card and downloading LD 17 interface 
parameters.

I/O port electrical interface – Each MSDL port can be configured as an 
RS-232 or RS-422 interface by setting the switches on the MSDL card. 
MSDL ports use Small Computer Systems Interface (SCSI) II 26-pin female 
connectors.

 shows the system architecture using the MSDL as an 

operational platform. It illustrates operation routing from the CPU, through 
the MSDL, to the I/O equipment. It also shows an example in which DCH 
operation peripheral software in the MSDL controls functions on ports 
2 and 3.

The system automatically performs self-test and data flow activities. Unless 
a permanent problem exists and the system cannot recover, there is no visual 
indication that these operations are taking place.

The system controls the MSDL card with software that it has downloaded. 
The MSDL and the system enable the MSDL by following these steps:

When the MSDL card is placed in the system, the card starts a self-test.

When the MSDL passes the test, it indicates its state and L/W version to 
the system. The CPU checks to see if downloading is required.

After downloading the peripheral software, the system enables the 
MSDL.

MSDL applications (DCH, AML, SDI) may be brought up if 
appropriately configured.