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which means that it has receive the correct test bit. If you choose to set the
loop-back of the remote E1 line RLOOP, it means testing the whole process
of signal.
(2)
When testing the local E1 loop-back DLOOP, the bit error test function at the
remote equipment and the local E1 loop-back function at the local
equipment DLOOP should be on. It means that the test bit sent by the
remote equipment loops back on the local equipment. At this time, if the
remote and local equipment are both working in the transparent mode, the
TEST indicator at the remote equipment should be Flashing, the LOOP
indicator is off and the PAT indicator is on, which means that it has received
the right test bit; if the remote and local equipment are working in the
fractional mode, the TEST indicator at the remote equipment should be on,
the LOOP indicator is Flashing and the PAT indicator is on, which means
that it has received the right test code.
(3)
When the loop-back ALOOP function at the local V.35 interface is enabled,
the local equipment must be working in the Master clock mode or V.35
terminal clock mode, or else, it will not work normally. At this time, the test
code returns to the internal of the equipment for check before it is sent out of
the E1 interface. It means testing some function of the equipment.
th
4. 5
bit: selecting switch of the received data phase of V.35 RX CLK phase
(default OFF)
RX CLK phase selecting provides different options according to the relation
between V.35 clock of different brand Router and the data phase When RX CLK
is positive, it passes the test on the V.35 synchronizing WAN interface of Cisco
Router.
RX CLK positive: data is sent to RD signal when the RX CLK clock is at the
negative edge.
RX CLK
RD
RX CLK negative: data is sent to RD signal when the RX CLK clock is at the
positive edge.
RX CLK
RD
Attention: The phase relation of TX CLK and TD is adjusted automatically.
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5
bit
RX CLK phase
ON
Negative
OFF
Positive
13
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