Huawei Airbridge CBTS3612-800 User Manual page 63

User Manual
Airbridge cBTS3612-800 12-carrier CDMA Base Station
See Table 1-2 for the description of BCIM DIP switches and jumpers.
Table 1-2 BCIM DIP switches and jumpers
Sequence
number
S2~S9
J6
03Q-0112-20020720-120
Function
Selection of: 1) E1 interface matching
impedance (75W/120W); 2) E1
interface unbalanced/unbalanced
mode.
Feedback of E1 interface matching
impedance (75W120W) mode. The
program initializes E1 driving chip
based on the status of this jumper.
1 BTS Control Interface Module (BCIM)
Description
All four digits set to OFF: 120W twisted pairs.
All four digits set to ON: 75W co-axial cable, with sheath
connected with PGND.
Digits 1 and 2 set to ON, and digits 3 and 4 set to OFF:
75W co-axial cable, with sheath not connected with
PGND.
Other settings: Undefined.
Connect jumpers 2 and 3: 120W configuration mode.
Connect the others or no connection at all:
75W configuration mode
1-3