Raisecom RC905-EE1 - E1 Interface Impedance Settings; SW1 Settings for Fractional E1 Bandwidth

8
OFF= No loop back. When equipment is working in normal status, it should be OFF.
This bit of dip-switch can be set to test link status only when the equipment works in master
clock mode and on fractional E1 pattern.
Whether the remote-site loop-back is successful or not is judged by the RLP yellow indicator on
the front panel (On).
5
th
~8
th
bits: For setting up impedance of E1 interface, please see the table below
Dip-switch 5
th
bit 6
th
bit 7
th
bit 8
th
bit
75ohm BNC effective ON ON ON OFF
120ohm RJ-45 effective OFF OFF OFF ON
Please set up interface impedance of E1 port strictly in conformity with the above table if not the
equipment will work improperly
SW2 Factory Default Configuration
Switch 1 2 3 4 5 6 7 8
ON
■ ■ ■
OFF
■ ■ ■ ■ ■
Definition When
auto-negot
iation
fails, it’s
on Half
Duplex.
Disable
Fault-Pass
-Through
capability
Equipment is
on
transparent
E1 pattern.
Remote
Loopback
is disabled.
75 ohm BNC effective at E1
interface
1. SW1 dip-switches (only effective on the condition that the 3
rd
bit of SW2 is set up to
ON, i.e. in fractional E1 mode):
1
st
~5
th
bit: For setting up the Ethernet bandwidth, i.e. N value of N*64kbps bit rate. Please see
the table below:
1
st
Bit 2nd Bit 3rd Bit 4th Bit 5th Bit Bandwidth (Unit: bit/s)
0 0 0 0 0 0* 64K = 0K
0 0 0 0 1 1* 64K = 64K (Minimum bandwidth)
0 0 0 1 0 2* 64K = 128K
0 0 0 1 1 3* 64K = 192K
0 0 1 0 0 4* 64K = 256K