MODEL7304 User Manual
Page 6 of 11
Select the number of time slots according to the expected rate. Normally for an independent
type, a time slot setting of automatic tracking Central Site module is selected. Coded switches
of plate-clip time slot correspond to S1, S2, S3 and S4.
Rear
Rear
Rear
Rear Panel
Panel
Panel
Panel of
of
of
of MODEL7304
MODEL7304
MODEL7304
MODEL7304/DC
/DC
/DC
/DC
48V DC
：
DC -48V power supply connector
The others are the same as AC Rear Panel
4
4
4
4....3
3
3
3 Front/Rear
Front/Rear
Front/Rear
Front/Rear panels
panels
panels
panels of
of
of
of Rack-mountable
Rack-mountable
Rack-mountable
Rack-mountable casing
casing
casing
casing::::
�
�
�
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RACK
RACK
RACK
RACK front
front
front
front panel
panel
panel
panel
：
Front
Front
Front
Front Panel
Panel
Panel
Panel of
of
of
of RACK
RACK
RACK
RACK
+5V: 5V main power supply indicator lamp
+12V: 12V fan power supply indicator lamp
Under the panel is a group of indicator lamps matrix:
PWR : power supply lamp
RXD : lightening upon data receiving at V.35
TXD : lightening upon data sending from V.35
LOS : lightening when the optic line gets lost
LOF : lightening after a synchronization of data out-of-frame
TEST : lightening during loopback test (equivalent to LOOP)
PTOK: lightening after a successful pseudo-random code test
�
�
�
�
RACK/AC
RACK/AC
RACK/AC
RACK/AC AC
AC
AC
AC redundancy
redundancy
redundancy
redundancy power
power
power
power supply
supply
supply
supply panel
panel
panel
panel
：
RACK/AC
RACK/AC
RACK/AC
RACK/AC AC
AC
AC
AC Redundancy
Redundancy
Redundancy
Redundancy Power
Power
Power
Power Supply
Supply
Supply
Supply Panel
Panel
Panel
Panel
160~270 VAC
：
AC 220V input jack
ON OFF
：
power switch
+5V
：
5V main power supply indicator lamp
；
+12V
：
12V fan power supply indicator lamp
