Page 852 of 906 QPC513 Enhanced Serial Data Interface card553-3001-211 Standard 3.00 August 2005Each system can accommodate up to eight ESDI cards, for a total of 16synchronous ports per system. The ESDI cards can be housed in the networkslots of any of the following modules:• NT5D21 Core/Network module (slots 0 through 7)• NT6D39 CPU/Network module (slots 1 through 9 and 13)• NT6D60 Core module (slots 0 through 5)• NT8D35 Network module (slots 5 through 13)• NT9D11 Core/Network module (slots 0 through 8)Note: When as ESDI card is installed in an NT6D60 Core module, anNT8D34 CPU module, or slot 13 of an NT6D39 CPU/Network modulein a dual-CPU system, any I/O device connected to the card does notfunction when the CPU in that module is inactive.Physical descriptionThe ESDI card circuitry is contained on a 31.75 by 25.40 cm (12.5 by 10 in.)printed circuit board. The front panel of the card is 2.54 cm (1 in.) wide. SeeFigure 182 on page 853. The front panel is equipped with an Enable/Disable(ENB/DIS) switch and a red LED. The LED lights when the followingoccurs:• the ENB/DIS switch is set to DIS• both ports are disabled in software• none of the card’s ports have been configured in software• the switch settings on the card do not match the settings programmed insoftware
