3One data 7304 Gebruikershandleiding - 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

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

MODEL7304 bottom

bottom coded

bottom

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

coded

switch

switch：

B B B B ottom

ottom

Coded

ottom Coded

Coded Switch

Page 5 of 11

MODEL7304 User Manual

/AC

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