3 Board
M900/M1800 BTS3X Series Base Transceiver Station
Hardware Description Manual
3-54
Huawei Technologies Proprietary
Issue 01 (2006-11-18)
ID
Type
Meaning
Indication
TME1 DB37
E1
transmission
signal conversion
port
This socket is used in the following cases:
!
When ABB or ABA is not configured and
120-ohm transmission cable is adopted,
this socket is connected with lightning
protection board using conversion cable to
introduce E1 signal.
!
When ABB or ABA is not configured,
this socket is connected with TRA1 using
conversion cable to introduce E1 signal.
For details, refer to information concerning
cable installation in installation manual of
corresponding BTS.
TRA1 DB37
TRA2 DB37
TRB1 DB37
TRB2 DB37
Built-in optical
transmission signal
conversion port
!
The functions of TRA1 and TRA2 are the
same, and so are the functions of TRB1
and TRB2. In optical transmission mode,
these ports can all be used to lead in the
E1 signals converted at TEU.
!
The conversion slot corresponding to
TEU0 is TRA1 and TRA2, and that
corresponding to TEU1 is TRB1 and
TRB2.
!
TRA1, TRA2, TRB1 and TRB2 can be
used to lead E1 signals to other cabinets.
!
When ABB or ABA is configured, TRA1
and TRA2 are used to convert the signal.
For details, refer to information concerning
cable installation in installation manual of
corresponding BTS.
There is only one clock selection DIP switch (2-bit) on the TDU.
Table 3-29
TDU DIP switch setting
Bit 1
Bit 2
Meaning
OFF OFF
!
In the cabinet group, bit 1 and bit 2 of the basic cabinet in the basic
cabinet group are set as OFF and OFF respectively.
!
In the combined cabinets, bit 1 and bit 2 of basic cabinet is set as OFF
and OFF respectively.
ON OFF Disable
OFF ON Disable