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ROC364 Instruction Manual
4-8 Communications
Cards
Rev
Jun/05
DOC0245A
U1
C1
U4
R4
R3
Y1
U2
C4
C6
U5
FB
FB6
C7
CR5
RP1
DSR
CR7
CR6
OH
R
I
CR4
CR3
CR2
TXD
DTR
R
XD
30
2
1
P1
1
2
30
J1
U3
FB
4
FB
5
30
2
1
J2
C12
C11
1
2
30
P3
C17
COM PORTS
C13
U7
C14
C16
R5
U6
C8
C9
FB
FB
7
C10
FB
8
U8
C18
C15
C19
FB3
FB2
R1
R2
FB
1
C2
C5
CR1
C3
1
P2
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