NOTE
Bits 3 and 4 of
S1
should be kept as out-of-factory state, without any manual setting on site. The out-of-
factory state should be OFF. If the bits are ON, set them to OFF.
Table 4-5
Details of the DIP Switch
S2
DIP
Switch
Bit Status
Description
1
2
3
4
S2
OFF
OFF
OFF
OFF
By default, all the DIP
bits of S2 are set to OFF
in all the modes.
ON
ON
ON
ON
When the four E1 RX
links in 75 ohm have
errors, all the bits of S2
must be set to ON to
rectify the faults on the
E1 links.
Others
Unavailable
Table 4-6
Details of the DIP Switch
S4
DIP
Switch
Bit Status
Description
1
2
3
4
S4
ON
ON
ON
ON
Supporting E1 bypass
OFF
OFF
OFF
OFF
Not supporting E1
bypass
Others
Unavailable
Table 4-7
Details of the DIP Switch
S5
DIP
Switch
Bit Status
Description
1
2
3
4
S5
ON
ON
ON
ON
Not supporting E1
bypass
OFF
ON
ON
OFF
Supporting E1 bypass
of level-1 cascaded
base stations
ON
OFF
ON
OFF
Supporting E1 bypass
of level-2 cascaded
base stations
BTS3900
Hardware Description
4 BTS3900 Components
Issue 04 (2011-02-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
4-9