Comtech EF Data SNM-1000 User Manual
Page 134
SNM-1000 Node Control Modem
Revision 3
Maintenance
MN/SNM1000.IOM
5–4
Table 5-1. SNM-1000 Fault Tree (Continued)
T
X
I
F
O
U
T
P
U
T
O
F
F
T
X
F
A
U
L
T
R
E
L
A
Y
R
X
F
A
U
L
T
R
E
L
A
Y
F
A
U
L
T
L
E
D
C
O
M
E
Q
F
A
U
L
T
R
E
L
A
Y
T
X
A
L
A
R
M
R
E
L
A
Y
#
2
R
X
A
L
A
R
M
R
E
L
A
Y
#
3
S
P
A
R
E
R
E
L
A
Y
A
L
A
R
M
#
1
P
R
I
M
A
R
Y
A
L
A
R
M
R
E
L
A
Y
S
E
C
O
N
D
A
R
Y
A
L
A
R
M
R
E
L
A
Y
I
B
S
B
A
C
K
W
A
R
D
A
L
A
R
M
D
E
F
E
R
R
E
D
M
A
I
N
A
L
A
R
M
TX INTERFACE FAULTS
(1) (2)
(3) (4) (5)
(6)
(7)
(8)
TX DROP
Not Applicable
TX
DATA/AIS
X
X
X
X
TX
CLK
PLL
X
X
X
X
TX
CLK
ACTIVITY
X
X
X
TX AUDIO 1 CLIP
Not Applicable
TX AUDIO 2 CLIP
Not Applicable
CONFIGURATION
X
X
X
RX INTERFACE FAULTS
BUFFER
UNDERFLOW
X
BUFFER
OVERFLOW
X
RX
DATA/AIS
X
X
X
FRAME
BER
X
X
X
X
BACKWARD ALARM
Not Applicable
BUFFER
CLK
PLL
X
X
X
BUFFER
CLK
ACT
X
X
X
DEMUX
LOCK
X
X
X
X
RX
2047
LOCK
X
X
BUFFER
FULL
X
X
RX INSERT
Not Applicable
RX AUDIO 1 CLIP
Not Applicable
RX AUDIO 2 CLIP
Not Applicable
CONFIGURATION
X
X
Legend
Test Note
Fault/Alarm Relay
Test Points Connector/Pins
1
TX FAULT
Pin 4 (NO), 5 (COM), 6 (NC) *
2
RX FAULT
Pin 7 (NO), 8 (COM), 9 (NC) *
3
COM EQ FAULT
Pin 1 (NO), 2 (COM), 3 (NC) *
4
TX ALARM #2
Pin 4 (NO), 5 (COM), 6 (NC) *
5
RX ALARM #3
Pin 7 (NO), 8 (COM), 9 (NC) *
6
PRIMARY ALARM
Pin 43 (NO), 10 (COM), 27 (NC) *
7
SECONDARY ALARM
Pin 44 (NO), 11 (COM), 28 (NC) *
8
DEF MAINT ALARM
Pin 17 **
*
A connection between the common and N.O. contacts indicate no fault/alarm.
**
Signal is open collector high impedance if faulted.