01-04 Introduction to the BBU3806C

4 Introduction to the BBU3806C

About This Chapter

The BBU3806C is an outdoor baseband unit that processes baseband signals.

The BBU3806C has the following functions:

l Providing ports for data communication between the BBU3806C and the RNC

l Providing OM channels between the BBU3806C and the LMT or the M2000 to operateand maintain the BBU3806C

l Providing SAAL paths for the signaling processing between the BBU3806C and the RNC

l Providing the CPRI interface for communication between the BBU3806C and theRRU3801C

l Processing uplink and downlink baseband signals

l Managing the entire distributed NodeB system in terms of OM and signaling processing

l Providing the system clock

4.1 Appearance of the BBU3806CThe BBU3806C is the outdoor model of the BBU3806.

4.2 Panel of the BBU3806CThe BBU3806C has panels at the module bottom, on the cabling cavity, and on the maintenancecavity.

4.3 LEDs on the BBU3806CThe LEDs are on the panel of the BBU3806C maintenance cavity, which indicate the runningstatus of the BBU3806C.

4.4 Ports on the BBU3806CThe ports on the BBU3806C consist of grounding ports, power supply ports, transmission ports,alarm ports, and other ports.

4.5 DIP Switch on the BBU3806CThe BBU3806C has only one DIP switch.

4.6 Engineering Specifications for the BBU3806CThis describes the engineering specifications for the BBU3806C.

DBS3800Hardware Description 4 Introduction to the BBU3806C

Issue 03 (2008-01-15) Huawei Technologies Proprietary 4-1

4.1 Appearance of the BBU3806CThe BBU3806C is the outdoor model of the BBU3806.

Figure 4-1 shows the BBU3806C. On the left is a front view of the BBU3806C without thehousing, in the middle is a side view of the BBU3806C without the housing, and on the right isa front view of the BBU3806C housing.

Figure 4-1 BBU3806C

4.2 Panel of the BBU3806CThe BBU3806C has panels at the module bottom, on the cabling cavity, and on the maintenancecavity.

Figure 4-2 shows the panels of the BBU3806C.

4 Introduction to the BBU3806CDBS3800

Hardware Description

4-2 Huawei Technologies Proprietary Issue 03 (2008-01-15)

Figure 4-2 Panels of the BBU3806C

Table 4-1 describes the ports, LEDs, and DIP switch on the panel of the BBU3806C.

Table 4-1 Ports, LEDs, and DIP switch on the panels of the BBU3806C

Item Label Description

Ports at thebottom

8*E1/T1 Ports for Iub transmission

2*FE

RS485&EXT_ALM Port for external alarms

PWR Socket for power supply

E1 GND Port for E1 grounding connection

GPS Port for GPS signal input



Item Label Description

OPT Reserved

Ports on thecabling cavity

CPRI0 to CPRI2 Ports for interconnection between theBBU3806C and the RRU3801C

EIa Reserved

Ports on themaintenancecavity

ETH_RS323 Port for commissioning

8K/TTI Port for testing

10M Port for clock signal output

ON/OFF Power switch of the BBU3806C

RST Button used to reset the BBU3806C

LEDs RUN For details, refer to 4.3 LEDs on theBBU3806C.

ALM

ACT

LIU0 to LIU7

CPRI0 to CPRI2

DIP switch LOCAT_ID For details, refer to 4.5 DIP Switch on theBBU3806C.

E1/T1

4.3 LEDs on the BBU3806CThe LEDs are on the panel of the BBU3806C maintenance cavity, which indicate the runningstatus of the BBU3806C.

For the positions of the LEDs on the BBU3806C, refer to 4.2 Panel of the BBU3806C. Table4-2 describes the LEDs and their states.

Table 4-2 LEDs on the BBU3806C

Label Color State Description

RUN Green ON The BBU3806C is checking theversion, or the module is faulty.

OFF The BBU3806C has no power input,or the module is faulty.

1 s ON, 1 s OFF The BBU3806C is running asconfigured.




Label Color State Description

0.25 s ON, 0.25 s OFF The software is being loaded to theBBU3806C, or the BBU3806C is notconfigured.

ALM Red ON The BBU3806C is reporting alarms(not including VSWR-related alarms).

OFF The BBU3806C is operational.

ACT Green ON The BBU3806C is active.

OFF The BBU3806C is not in use.

LIU0 toLIU7

Yellow ON Local alarms related to the E1/T1 arereported.

0.25 s ON, 0.25 s OFF Remote alarms related to the E1/T1are reported.

OFF The link is not in use, or the alarm iscleared.

CPRI0 toCPRI2

Yellow ON Local alarms related to LOS arereported.

0.125 s ON, 0.125 s OFF Remote alarms related to LOS arereported.

OFF The ports are normal or not in use.

4.4 Ports on the BBU3806CThe ports on the BBU3806C consist of grounding ports, power supply ports, transmission ports,alarm ports, and other ports.

Grounding Ports

The BBU3806C has two grounding bolts at the bottom.

Power Supply Ports

Table 4-3 Power supply ports on the BBU3806C

Application Port Quantity

Connector Type

Power supply ports +220 V AC or –48 VDC power

1 9-pin, round, and waterproof



Transmission Ports

Table 4-4 Transmission ports on the BBU3806C

Application Port Quantity Data Rate Connector Type

Iub interface E1 1 (8 E1s) 2 Mbit/s 32-pin, round, andwaterproof

T1 1 (8 T1s) 1.5 Mbit/s 32-pin, round, andwaterproof

Fast Ethernet 2 100 Mbit/sFull-duplex

8-pin, round, andwaterproof

Optical portsbetween theRRU3801Cs

CPRI 3 1.25 Gbit/s ESFP socket

Alarms Ports

Table 4-5 Alarm ports on the BBU3806C

Application Port Quantity Connector Type

Alarms ports RS485 1 DB15

Four dry contacts 1

Table 4-6 Specifications for the alarm ports on the BBU3806C

Specification Parameter

Closed resistance < 0.2 k ohm

Open resistance < 51 k ohm

Other Ports

Table 4-7 Other ports on the BBU3806C


Connector Type

E1 grounding selection Grounding connectionsfor eight coaxial E1s

1 19-pin, round, andwaterproof

GPS signal input – 1 N-type





Connector Type

Clock signal input/output

10 MHz clock signaloutput

1 SMB male

Testing 8 kHz TTI Testing 1 SMB male

Commissioning Serial or Ethernet 1 RJ45

4.5 DIP Switch on the BBU3806CThe BBU3806C has only one DIP switch.

Figure 4-3 shows the DIP switch on the BBU3806C.

Figure 4-3 DIP switch on the BBU3806C

Bits 1 and 2 are reserved, and bits 3 and 4 are used to set the E1/T1 mode and line impedance.Table 4-8 describes the settings of bits 3 and 4 on the DIP switch.

Table 4-8 Settings of bits 3 and 4 on the DIP switch

Bit 3 Bit 4 Description

OFF OFF 120-ohm E1

OFF ON 100-ohm T1

ON OFF Reserved

ON ON 75-ohm E1 by default



4.6 Engineering Specifications for the BBU3806CThis describes the engineering specifications for the BBU3806C.

Physical Dimensionsl The dimensions of the BBU3806C (without the bracket and housing) are 355 mm x 135

mm x 480 mm (W x D x H).l The dimensions of the BBU3806C (with the bracket and housing) are 380 mm x 200 mm

x 610 mm (W x D x H).

WeightThe weight of the BBU3806C is 15 kg at most.

Power Input

Table 4-9 Power input to the BBU3806C

Rated Voltage Operating Voltage Range Remarks

–48 V DC –40 V DC to –60 V DC -

220 V AC 150 V AC to 300 V AC 47 Hz to 63 Hz

Power Consumptionl If –48 V DC power is used, the maximum power consumption of the BBU3806C is 100

W.l If 220 V AC power is used, the maximum power consumption of the BBU3806C is 120

W.




01-04 Introduction to the BBU3806C

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