3onedata MODEL7302 Panduan Pengguna - Halaman 5

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E1 LOS：Alarm indicator lamp for code missing in E1 line. Constantly lightening indicates

the alarm with local device.

FO LOF：Alarm indicator lamp of input signal out-of-frame in optic line. Constantly

lightening indicates the alarm with local device; flash indicates the alarm with

opposite device. Alarm status of opposite device can be detected only at framing

mode.

FO LOS：Alarm indicator lamp for code missing in optic line. Constantly lightening indicates

the alarm with local device.

LOOP：Indicator lamp of loopback test status. When local device is at a loopback status, the

lamp is constantly lightening; when opposite device is at a loopback status, the 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/CRC：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.

 Rear panel：

220V AC： AC power jack.

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

on.

E1-75Ω TX/RX：Receiving/sending jack of 75ΩBNC interface in E1.

E1-120Ω： Jack of 120Ω RJ45 interface in E1.

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.

S5.2＝OFF：network clock at E1 interface(Received Recovered) (S5.1 in whatever status)

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＝ON：using local crystal oscillation 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: Reserved

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

S5.6: Local digital loopback (E1 interface loopback), ON valid.

S5.7: Remote digital loopback (remote optic interface loopback), ON valid. Valid at

framing mode (0 time slot unused).

Rear Panel of MODEL7302/AC

Page 5 of 10

MODEL7302 User Manual