Dynamix RC 903-V35FE1, User Manual, Page: 13 / 26

OFF OFF Master clock (internal timing)
OFF ON
ON OFF
V.35 Terminal clock ( followV.35
interface timing )
ON ON Slave clock (followE1 line timing)
2. 3
rd
bit: selecting switch for auto follow function TS-FLOW (default OFF)
3
rd
bit Timeslot auto follow
function
ON Enable
OFF Disable
To realize the setting of local timeslot bandwidth to follow the remote site, the following
pre-conditions must be guaranteed:
1) This equipment is used point to point in pairs.
2) There is no PCM equipment occupying Sa bit connecting in series in the E1 link
3) The local equipment should be set to the slave clock mode.
After fulfilling the above condition, you can set the auto-follow switch of the local
equipment to ‘ON’ to enable the auto-follow function. The timeslot occupying and
frame mode (PCM30/PCM31) setting of the local equipment will automatically follow
the remote equipment.
3. 4
th
bit: selecting switch for bit error test function BERT (default OFF)
4
th
bit Inner bit error test
function
ON Enable
OFF Disable
There is an internal bit error test unit in this equipment. Its main function is to produce
a pseudo random series in the format of 2E15-1-Std, which will be sent to the E1 line.
User could load this series to proper data channel through configuration, and then with
multiple loop-back function, the returned series can be checked by the equipment.
The result will be shown on the PAT indicator on the front panel. When bit error is
detected, the PAT indicator will be off for at least 1 second. If there is no new bit error,
PAT indicator will return to the on status.
If the bit error test function is on, test series will be inserted into the data channel used
by the client. This function can be used both in the fractional and transparent mode.
When this function is in use, business on the V.35 interface will stop.
Attention:
(1) Bit error test function could be combined with multiple loop-back for testing.
When the local V.35 interface loop-back function is not enabled, you can use
coaxial cable to make a loop-back at the E1 interface on the local equipment,
which means testing the local equipment. In this situation, the TEST
indicator is Flashing, the LOOP indicator is OFF, and the PAT indicator is ON,
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