User manual

Raisecom Technology Co., Ltd

OFF Disable

To make local timeslot follow remote timeslot, below three conditions should be ensured:

(1) This series device is used point to point in pair.

(2) There is no PCM device which occupy the Sa bit linked in E1 line.

(3) Local device works on slave clock mode.

When all of above condition is satisfied, setting the SW5-3 of local device as ON to open

timeslot auto-follow function, the timeslot and frame mode (PCM30/PCM31) of local

device will follow the configurations of remote device automatically.

3. The 4

bit: Error code test function choosing dip-switch BET (default OFF)

SW5-4 Internal Error Code Test Function

ON Enable

OFF Disable

There is an error code test unit inside this series device, and the main purpose of this unit

is producing pseudo random sequence (2E15-1 STD) and sending them to optical line.

This sequence can be uploaded to proper data channel by configuration, and then via

many loopback modes the returned sequence is sent to device for testing. The testing

result will be displayed by the PWR/PAT indicator on front panel. When error code is

captured the PWR/PAT indicator will turn to green and keep for at least one second. If

there is no new error code occurs the PWR/PAT indicator will come back to steady yellow

status.

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

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