M900/M1800 BTS3X Series Base Transceiver Station
Hardware Description Manual
3 Board
Issue 01 (2006-11-18)
Huawei Technologies Proprietary
3-5
3.2.3 DIP Switch
shows the ABB layout.
Figure 3-3
ABB layout
1 2 3 4
ON
S2
lists the function of the DIP switch on the ABB.
Table 3-3
Functions of ABB DIP switch S2
Bit 1
Bit 2
Bit 3
Bit 4
Indication
OFF
OFF
X
X
Not end site, transmission terminal loopback not
supported
(Default setting)
ON
ON
X
X
End site, transmission terminal loopback supported