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Tests
Channel Tests
4-16
SpectraComm 553 Fractional T1 DSU
076R155-000
Installation and Operation Manual
Issue 7
Figure 4-17
Channel Remote Digital Loop
Note
Tests cannot be performed by means of front panel switches when the front panel has been inhibited by
an SNMP controller or by the terminal interface. Front panel enabled is the default condition. The DTE
interface RL lead can only command Remote Test if Channel EIA Test Leads has been enabled by an
SNMP controller or by the terminal interface. The default condition is disabled.
553
OOF NS
INS
ON
L
I
N
E
I
N
O
U
T
RSP
SD
RD
EQ
BPV
AIS
TM
ALM
CH
T1
RL
TX
RX
M
O
N
SC 553 DSU
Remote DSU
DTE
Inter-
face
Framer
TX
Driver
Analog
Receiver
Network
Analog
Receiver
TX
Driver
Framer
DTE
Inter-
face
DTE
or
Test Device
3. Enter test data at the DTE. Compare
data entered at the DTE with data
looped back and displayed by the
DTE. (Test equipment can be
connected in place of the DTE.
2. TM indicator On while Remote
Test is active.
1. To start the test from the front panel,
press RL momentary action switch.
RL indicator is lit during the test.
Press switch again to end the test.