MODEL7302 User Manual
Page 7 of 10
RACK/AC AC redundancy power supply panel
：
RACK/AC AC Redundancy Power Supply 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
RACK/DC DC redundancy power supply panel
：
RACK/DC DC Redundancy Power Supply Panel
40~60 VDC
：
DC-48V input connector (FG grounded, with“- +” terminals connected with
48V input)
ON OFF
：
power switch
+5V
：
5V main power supply indicator lamp
+12V
：
12V fan power supply indicator lamp
5. MODEL7302 Application
5.1 E1 configuration
The device support two physical match impedance of the E1 interface, which can
automatics 120ohm balanced twisted-pair and 75ohm non-balanced coaxial cable interface.
Users can select the appropriate interface to connection dispense with any operation.
5.2 Connection the Twisted Pair(120 ohm) to the G.703 Network
As shown, 1 and 2 are sending lines, 4 and 5 are receiving lines.
Line Sequence of Balanced Twisted-Pair at E1 Interface RJ45
Attention
: In E1 twisted-pair standard, 1 and 2 are defined as sending lines, 4 and 5 as
receiving lines.
1
2
3
4
5
6
7
8
1. TX+ Positive end of data transmission
2. TX- Negative end of data transmission
3. Idel
4. RX+ Positive end of data reception
5. RX- Negative end of data reception
6. Idel
7. Idel
8. Idel
