Alcatel-Lucent 7750 SR-a4, Руководство по установке, Страница: 206 / 232

Removing and Replacing an MDA-a or MDA-aXP Card
206 7750 SR-a4 and SR-a8 Installation Guide
Removing an MDA-a
Figure 75 shows how to remove an MDA-a from the 7750 SR-a4 chassis. Table 103
describes the features. The same method applies to the MDA-a cards in the 7750 SR-a8
chassis.
Figure 75: Removing an MDA-a
Required tools:
• #2 Phillips or flat blade screwdriver
To remove an MDA-a:
Step 1. Disconnect all cables connected to the MDA-a ports.
Step 2. Use a Phillips screwdriver to loosen the MDA-a captive screws (Key 2 in
Figure 75 ).
Table 103: Removing an MDA-a Features
Key Description
1 MDA-a positioned in the chassis slot guides
2 MDA-a captive screws (one on each side of the MDA-a)
3 Threaded receptacle
7750
S R-a4 Fan Tray
Pwr
S tat
S
lot Layout
1/1 XP
1/2
1/3
1/4
1
CPM A
CPM B
7750 SR-a4
S ervice Router
Pwr
Stat
Pwr
7
7
5
0
MD
A
-a
X
P
1
-1
0
0
G
E
-C
F
P
Stat
Lnk
Pwr
7
7
5
0
M
DA
-a
20
-1
G
B-
TX
Stat
Lnk
1
Act
2 Lnk
3
Act
4 Lnk
5
Act
6
Lnk
7 Act
8
Lnk
9
Act
10 Lnk
11
Act
12 Lnk
13 Act
14
Lnk
15
Act
16 Lnk
17
Act
18
Lnk
19 Act
20
Pwr
7750
SR
-a
Stat
Pwr
7
7
5
0
M
DA
-a
44
-1
G
B-
CS
FP
/S
FP
Stat
Lnk/Act
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
25 26 27 28
29 30 31 32
33 34 35 36
37 38 39 40
41 42 43 44
17 18 19 20
21 22 23 24
Pwr
Stat
77
50
MD
A-a
X
P
10
-1
0G
B-
S
FP
+
10
Lnk
Act
9
Lnk
Act
8
Lnk
Act
7
Lnk
Act
6
Lnk
Act
5
Lnk
Act
4
Lnk Act
3
Lnk Act
2
Lnk Act
1
Lnk Act
Sy
nc
E/1
58
8
Alarms
1PPS
ACO/LT
Critical
Lnk DTE
Pwr
7
7
5
0
C
P
M-a
Stat
Console M
g
m
tO
E
S
B
ITS
Compact Flash
DCE Act Lnk
Act
Major
Minor
Sy
n
cE/1
58
8
Alarms
1PPS
ACO/LT
Critical
Lnk DTE
Pwr
7
7
5
0
C
P
M-a
Stat
Console M
gmt
O
E
S
B
ITS
Compact Flash
DCE Act Lnk
Act
Major
Minor
A
ir
F
ilt
er
A
c
c
es
s
77
5
0
S
R
-a
4
1
3
2
2
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