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ROC364 Instruction Manual

4-8 Communications Cards Rev Jun/05

DOC0245A

FB6

CR5

RP1

DSR

CR7

CR6

OH RI

CR4

CR3

CR2

TXDDTR RXD

FB4

FB5

C12

C11

C17

COM PORTS

C13

C14

C16

FB7

C10

FB8

C18

C15

C19

FB3

FB2

FB1

CR1

Figure 4-6. Dial-up Modem Communications Card – Old

4.3 Installing Communications Cards

The following procedures assume the first-time installation of a communications card in a ROC that

is currently not in service. For units currently in service, refer to the procedures in Section 4.5,

Troubleshooting and Repair, on page 4-19.

Change components only in an area known to be non-hazardous.

Failure to exercise proper electrostatic discharge precautions (such as wearing a grounded wrist

strap) may reset the processor or damage electronic components, resulting in interrupted

operations.

To install a communications card, proceed as follows:

1. Remove the power from the ROC.

2. Remove the FlashPAC.

3. Remove the screws that hold the MCU upper cover in place, and lift off the cover.

4. Install the communications card onto the MCU. Orient the card with the COM PORTS arrow

pointing down. Plug the card into its mating connectors and gently press until the connectors

firmly seat.

5. Install the retaining screw to secure the card. For Dial-up and Leased-Line communications

cards, continue with step 5; otherwise, proceed to step 7.

LED Indicators

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