3One data 7304 Manuale d'uso - Pagina 5

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lamp flashes. When local device is not at a framing mode, it is unable to detect

whether opposite device is at a loopback test status.

PTOK：Indicator lamp of pseudo-random code test. When the device is at a loopback status,

pseudo-random code test can be made. If this lamp is constantly lightening, it

indicates that pseudo-random code passes the test.

� � � � R R R R ear

ear

ear panel

ear

panel

panel：

panel

220V AC： AC power jack.

OFF ON： Power switch. When the ON button is pressed down, the power supply is turned

on.

V.35: V.35 interface, with a M34 cored jack.

TX RX : Receiving/sending jack of optical fiber, with TX as the sending terminal and RX as

the receiving terminal.

There is a coded switch S5 on the panel, which is used as the system configuration switch

to set such functions as clock, time slot, phase, loopback and pseudo-random code test etc.

Wherein, S5.1 and S5.2 are clock settings.

S5.1＝OFF, S5.2=OFF：network clock at V.35 interface(Received Recovered).

S5.1 ＝ OFF，S5.2＝ON：network clock at the optic fiber interface (Received Recovered).

Remote time slot setting can be tracked only at this status.

S5.1=ON, S5.2=OFF: invalid

S5.1 ＝ ON，S5.2＝ON：using local crystal OSC generating clock

S5.3: time slot setting

S5.3＝OFF，using remote time slot setting (valid only when S5.1 ＝ OFF，S5.2＝ON)

S5.3＝ON，using local time slot setting

S5.4: for V.35 receiving clock phase selection

S5.4=OFF, using positive phase

S5.4=ON, using negative phase

S5.5: Local loopback setting (optic interface in direct loopback), ON valid.

S5.6: Local digital loopback (V.35 interface loopback), ON valid.

S5.7: Remote digital loopback (V.35 interface loopback), ON valid.

Valid at framing mode (0 time slot unused).

S5.8: Pseudo-random code test, ON valid, and valid at loopback status.

� � � � MODEL7304

MODEL7304

bottom

MODEL7304 bottom

bottom coded

After time slot 0 is valid, other coded switches in whatever positions are all valid.

Rear

Rear Panel

Rear

Panel

Panel of of of of MODEL7304

MODEL7304

MODEL7304/AC

coded

switch

coded switch

switch：

B B B B ottom

ottom

Coded

ottom Coded

Coded Switch

Page 5 of 11

MODEL7304 User Manual

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