Product Description

Product Description
46 (98) © Nokia Corporation Draft DN991444
Nokia Proprietary and Confidential Issue 3-0 en Draft
Figure 13. Nokia MetroSite EDGE Base Station block diagram
BTS internal buses
The BTS internal signalling and the signalling between the BTS and the adjacent
external equipment is handled by the following buses:
• D1-bus, which handles the data transfer and signalling between the TRX
units and the transmission unit.
• D2-bus, which is the main communication channel between the master
TRX and slave TRXs. Software downloading is handled through the D2-
bus.
• Local Management Bus (LMB), which is used for the BTS and the
transmission units’ control.
Power
supply
Interface
unit
Backplane
Nokia MetroSite Base Station
Fan unit
LMP
EAC
Q1
Extension
connection
Abis
Transmission
unit
Power
supply
unit
TRX 4
TRX 3
TRX 2
TRX 1