3onedata MODEL7302 Manuel de l'utilisateur - Page 9

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S5.8: Pseudo-random code test control (PATT). "OFF" indicates normal operation; "ON"
indicates pseudo-random sequence test. The default is "OFF". It generates a
pseudo-random sequence code to be transmitted to E1 output terminal and tests
whether E1 input signal is in compliance with this sequence standard, so as to judge
whether the device and line transmission have an error code.
Remark: Pseudo-random sequence code test can be made only under a loop back status. At
this moment, constantly lightening of LOOP and PTOK/CRC lamps shows local
status, and flash shows remote status.

5.3.3 Framing/non-framing and time slot settings

Totally 32 coded switches S1, S2, S3 and S4 are used for E1 time slot setting.
st
switch (S1.1) is used for controlling E1 framing/non-framing. "ON" refers to
1
non-framing mode (2.048Mbps).
31 switches, from 2nd—32nd(S1.2~S1.8, S2, S3, S4), are respectively used for
controlling the selection of 1
selected; set at "OFF", the corresponding time slot is not selected. The rate of E1
interface is completely dependent on the number of the selected time slots. For example:
the setting of 3
slot is selected, at this moment the rate is 64K; the setting of 7
and all other switches to "OFF" indicates that 6
rate of 2× 64K=128K. TSO setting is used for specifying E1 frame to be transparent or
framing: "0"--framing, "1"--non-framing. But the bit has to be specified in combination
with other time slots. TS16 setting is used for controlling E1 frame structure to be
PCM30（CAS）or PCM31（CCS）: '0'—PCM30, at this moment 16
be used for transmission service; '1'—PCM31, 16
service. Besides, TS1—TS31 are respectively used for controlling the selection of
st
st
—31
time slots: '1'—the corresponding time slot is selected; '0'—the corresponding
1
time slot is not selected.
Typical application： Non-framing mode: 1
E1
FE1 Fiber Modem
Local
Remote Loop back
E1
FE1 Fiber Modem
Local
Pseudo-random Code Test
E1 Time Slot Setting
st
–31
st
rd
switch to "ON" and all other switches to "OFF" indicates that 2
FE1 Fiber Modem
Fiber Link
Remote
Fiber Link
FE1 Fiber Modem
Remote
time slots. Set at "ON", the corresponding time slot is
th
and 7
th
time slot can be used for transmission
st
switch is set to "ON", and all other switches
Page 9 of 10
MODEL7302 User Manual
E1
E1
th
th
switches to "ON"
and 8
th
time slots are selected, with a
th
time slot must not
nd
time