3One data 7304 User Manual page 6

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.
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 panels panels panels of of of of Rack-mountable
Front/Rear panels
RACK RACK front front panel panel
RACK RACK front front panel panel：
� � � �
+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 AC
RACK/AC RACK/AC AC AC redundancy AC
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
Rear Rear Panel Panel Panel of of of of MODEL7304
Rear Panel Rear
Rack-mountable Rack-mountable
Rack-mountable casing
Front Panel Front Front Front Panel of of of of RACK Panel Panel
redundancy power
redundancy power redundancy power supply power
RACK/AC RACK/AC RACK/AC RACK/AC AC AC AC Redundancy AC Redundancy Redundancy Power Redundancy
MODEL7304 MODEL7304 /DC /DC
MODEL7304/DC /DC
casing casing casing: : : :
RACK RACK RACK
supply panel
supply supply panel panel panel：
Power Power Power Supply Supply Panel Supply Supply
Page 6 of 11
MODEL7304 User Manual
Panel Panel Panel