Nortel Networks Circuit Card - Manual (Page 852)

Page 852 of 906 QPC513 Enhanced Serial Data Interface card
553-3001-211 Standard 3.00 August 2005
Each system can accommodate up to eight ESDI cards, for a total of 16
synchronous ports per system. The ESDI cards can be housed in the network
slots 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, an
NT8D34 CPU module, or slot 13 of an NT6D39 CPU/Network module
in a dual-CPU system, any I/O device connected to the card does not
function when the CPU in that module is inactive.
Physical description
The 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. See
Figure 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 following
occurs:
• 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 in
software