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V.3 5

Remark:

Remark: Pseudo-random sequence code test can be made only under a loopback status. At

Remark:

this moment, constantly lightening of LOOP and PTOK/CRC lamps shows local status, flash

shows remote status; TXD and RXD lamps are used for showing the status of local TXD or

RXD.

5.3.4

Framing/non-framing

5.3.4

5.3.4 Framing/non-framing

5.3.4

Framing/non-framing

Framing/non-framing and

Totally 32 coded switches S1, S2, S3 and S4 are used for E1 time slot setting.

switch (S1.1) is used for controlling E1 framing/non-framing. "ON" refers to

�

non-framing mode.

31 switches, from 2

�

the selection of 1

set at "OFF", the corresponding time slot is not selected. The rate of V.35 interface is

completely dependent on the number of the selected time slots. For example: the setting

of 3

switch to "ON" and all other switches to "OFF" indicates that 2

selected, at this moment the rate is 64K; the setting of 7

other switches to "OFF" indicates that 6

2×64K=128K. TS0 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

transmission service; '1'—PCM31, 16

Besides, TS1—TS31 are respectively used for controlling the selection of 1

slots: '1'—the corresponding time slot is selected; '0'—the corresponding time slot is not

selected.

Typical application： Non-framing mode: 1

�

to "OFF" (other switches are located in such a way that the setting of non-framing is

unaffected) Framing mode: 1st switch is set to "OFF", and all other switches are set

according to the time slot positions to be used by E1 channel and the rate of V.35 port. (If

it is set to tracking remote time slot, the time slot switch will become invalid)

Attention:

Attention: Ex-works S1, S2, S3 and S4 are all set to "OFF"

Attention:

Attention: The setting of tracking remote time slot; S5.2 to "ON"; S5.1 and S5.3 to "OFF"

Fiber Link

Fiber Modem V3 5

Local

pseudo-random

pseudo-random Code

and

time

slot

and time

and

time slot

time

slot

slot settings

Time

E1 Time

Time Slot

—32

(S1.2~S1.8, S2, S3, S4), are respectively used for controlling

–31

time slots. Set at "ON", the corresponding time slot is selected;

V.3 5

Fiber Modem V3 5

R e m o te

Code

Test

Code

Code Test

Test

settings

Slot

Setting

Slot Setting

Setting

and 8

and 7

time slots are selected, with a rate of

time slot can be used for transmission service.

switch is set to "ON", and all other switches

Page 10 of 11

MODEL7304 User Manual

time slot is

switches to "ON" and all

time slot must not be used for

—31

time