Raisecom Technology Co., Ltd
17
The device will add test sequence to user data channel after the error code test function is
enabled. This function is available in fractional mode and unframed (transparent) mode,
and when this function is enabled the V.35 operation will intermit.
Notice: The error code test function can be operated with many loop back tests. When the
local bidirectional loop back function is disabled the loop back can be simulated by fiber,
but the dual-fiber S3 and all single fiber device can not. At the time if PWR/PAT indicator is
steady yellow, it indicates that correct test code was received. If the remote bidirectional
loop back is enabled accompanied with error code test, it means the whole information
process will be tested.
4. The 5
th
bit: V.35 RX CLK Phase Choosing Dip-switch (default OFF)
SW5-5
Phase Choosing
ON
RX CLK Reverse Phase
OFF
RX CLK Positive Phase
The RX CLK phase choosing is provided because of the different V.35 clock and data
phase of different brand router. On Cisco series router the test result of V.35
synchronization WAN interface is passing when this device is connected and its RX CLK
is Positive.
RX CLK is Positive: Data will be sent to RD signal during RX CLK falling edge.
RX
CLK
RD
RX CLK is Reverse: Data will be sent to RD signal during RX CLK rising edge.
RX CLK
RD
Notice: The relationship of TX CLK and TD phase of this series device is auto-adjusted, so
users need not to configure it.
5. The 6th, 7
th
and 8
th
bit: Loop back dip-switch (default OFF)
SW5-6
SW5-7
SW5-8
ON
1
st
Tributary
Bidirectional
loopback enable
2
nd
Tributary
Bidirectional
loopback enable
Local loopback
