Ericsson Baseband 6648 User manual

Baseband Description
Baseband 6648
Description
271/1551-LZA 701 6001/1 Uen A

Copyright
© Ericsson AB 2020. All rights reserved. No part of this document may be
reproduced in any form without the written permission of the copyright owner.
Disclaimer
The contents of this document are subject to revision without notice due to
continued progress in methodology, design and manufacturing. Ericsson shall
have no liability for any error or damage of any kind resulting from the use of this
document.
Trademark List
All trademarks mentioned herein are the property of their respective owners.
These are shown in the document Trademark Information.
271/1551-LZA 701 6001/1 Uen A | 2020-04-29

Contents
1Product Overview 1
1.1 Main Features 1
1.2 Purpose 1
1.3 Variants 1
1.4 Overview 1
1.5 Warranty Seal 2
2Function Description 3
3Technical Data 5
3.1 Dimensions 5
3.2 Environmental Characteristics 5
3.3 Power Characteristics 5
4Hardware Architecture 7
5Baseband Interfaces 8
6Standards and Regulations 10
6.1 Regulatory Approval 10
6.2 Preventive Maintenance 12
6.3 Spare Parts 12
6.4 Transportation and Storage 12
Contents
271/1551-LZA 701 6001/1 Uen A | 2020-04-29

Baseband Description
271/1551-LZA 701 6001/1 Uen A | 2020-04-29

1 Product Overview
This document describes the 19-inch baseband units for Ericsson Radio Systems.
1.1 Main Features
This section describes the main features of the baseband.
Not all features are supported by all equipment congurations. For a description
of the current equipment congurations, see RBS Congurations.
The main features of the baseband are the following:
—NR, LTE, and NR + LTE Mixed Mode
—Elastic RAN
—Backhaul cascading
1.2 Purpose
Baseband 6648 provides switching, trafc management, timing, baseband
processing, and radio interfacing. The baseband unit is in the 19-inch format,
with 12 Common Public Radio Interface (CPRI or eCPRI) ports, enabling
increased connectivity for radio units.
1.3 Variants
—Baseband 6648:
• R2C and R2D versions have an operating temperature of 0 to +45°C.
• R2C and R2D versions have approximately 10% higher power
consumption across the temperature range.
For information about supported congurations and capacity, refer to RBS
Congurations
1.4 Overview
This section provides an overview of the 19-inch baseband units, see Figure 1.
Product Overview
271/1551-LZA 701 6001/1 Uen A | 2020-04-29 1

Ge19100A
-48V MAX 8A
AB
TN E SYNC LMTSS
ALARM
1 2
Baseband 6648
B C D A B C D E F G H J K L M
A
TN/IDL
Figure 1 Overview Baseband 6648
Baseband 6648 is a self-contained 19-inch unit with an easily removable fan tray
unit. Each unit can be installed standalone in any 19-inch rack or enclosure or in
an RBS.
Baseband 6648 facilitates a scalable, modular system with one or more indoor
19-inch baseband units and a number of external radios.
For information about 19-inch baseband unit placement in an enclosure or an
RBS, refer to Enclosure Description or RBS Description.
AIR / RRU
Ge19971A
Optical
cable
Optical
cable
Power
cable
AIR
Radio
Antenna
Baseband 6648
Power
IRU
RD
Figure 2 19-Inch Baseband Connected to External Radios
1.5 Warranty Seal
The product is equipped with a warranty seal sticker.
Note: Seals that have been implemented by Ericsson must not be broken or
removed, as it otherwise voids warranty.
Baseband Description
2271/1551-LZA 701 6001/1 Uen A | 2020-04-29

2 Function Description
The Baseband has the following functions:
—Timing function
—Loadable software
—Downlink (DL) baseband processing
—Uplink (UL) baseband processing
—IP trafc management
—Radio interface
—Backhaul handling
—External synchronization
For the block diagram of the Baseband, see Figure 3.
Ge0376B
Baseband
Processing
Transmission
Timing
Radio
interface
Baseband
Figure 3 Baseband Block Diagram
For more information about the external synchronization, see the following
documents:
—GNSS Receiver System Description
—GNSS Receiver System User Guide
—Manage Network Synchronization
—Manage Node Group Synchronization
Function Description
271/1551-LZA 701 6001/1 Uen A | 2020-04-29 3

—Manage LTE RAN Synchronization
Baseband Description
4271/1551-LZA 701 6001/1 Uen A | 2020-04-29

3 Technical Data
3.1 Dimensions
Dimensions and weight for the 19-inch Baseband unit are listed in Table 1, and .
Table 1 Dimensions and Weight
Baseband Height Width Depth Weight
Baseband 6648 1 U
(44.45 mm) 19-inch 352 mm ≈ 7.5 kg
3.2 Environmental Characteristics
Values for the normal operating environment of the baseband unit are shown in
Table 2.
Table 2 Environmental Data
Description Value
Temperature 0 to +55°C
Relative humidity 5–95%
Absolute humidity 1–29 g/m3
Maximum temperature change 0.5°C/min
Note: The operating environment of the unit must be a temperature-controlled
enclosed location suitable for sensitive data and telecommunication
equipment, with very low levels of airborne particles. For example
Network Telecommunication Facilities or inside an Outside Plant (OSP)
cabinet.
3.3 Power Characteristics
The power supply voltage for the baseband unit is −48 V DC. The power supply
requirements are shown in Table 3.
Table 3 DC Power Supply Requirements
Condition Value
Nominal voltage −48 V DC
Technical Data
271/1551-LZA 701 6001/1 Uen A | 2020-04-29 5

Condition Value
Operating voltage range −38.0 to −58.5 V DC
Non-destructive range 0 to −60 V DC
Fuse and Circuit Breaker Recommendations
The external fuse and circuit breaker recommendation for the baseband unit is
shown in Table 4.
The recommendations in this section are based on peak power consumption and
give no information on power consumption during normal operation.
The recommended melting fuse type is gG-gL-gD in accordance with
IEC 60269-1. Circuit breakers must comply with at least Curve 3 tripping
characteristics in accordance with IEC 60934.
Table 4 Fuse and Circuit Breaker Recommendations
DC Power Minimum Fuse Rating for
Reliable Operation (A)(1)
Maximum Fuse Rating
(A)(2)
Baseband unit 16 20
(1) The recommended fuse rating corresponds to peak load and depends on the conguration.
(2) This value is the internal maximum fuse rating for the unit. General fuse dimensioning have to
take all external factors into account, such as local regulations and cable dimensioning.
3.3.1 Power Consumption
The power consumption values are presented as typical and maximum values,
for a unit with fan. The typical values are based on an air temperature of 20 °C
for the air entering the unit and a typical trafc load. The maximum values are
based on an air temperature of 40 °C for the air entering the unit and a maximum
trafc load.
Note: The power consumption for SFPs or GPS is not included.
Table 5 Power Consumption
Unit Typical Maximum
Baseband 6648 ≈ 310 W ≈ 340 W
For information on power consumption values see Power Consumption Data and
Power Consumption Calculations.
Baseband Description
6271/1551-LZA 701 6001/1 Uen A | 2020-04-29

4 Hardware Architecture
This section contains an overview of the hardware units of the 19-inch baseband
unit.
Figure 4 Baseband 6648 Hardware Architecture
Baseband
Ge19101A
B
A
C
C
Table 6 19-Inch Baseband Hardware Units
Position Name of Units Number of Units
A 19-inch baseband unit 1
B Fan module 1
C Movable Brackets 2
Hardware Architecture
271/1551-LZA 701 6001/1 Uen A | 2020-04-29 7

5 Baseband Interfaces
The interfaces for the baseband units are described in Table 7.
Table 7 Baseband 6648 Interfaces
Marking Connector Description Optical
Indicator(1) Channels FEC
A
B
ET20 A(2)(3)(4) −48 V DC
Power
Yes - -
TN/IDL A(5) (6) QSFP+/QSFP28 4×10 Gbps/4×25 Gbps
Ethernet transmission
External interface; electrical/
optical
Yes 4 RS(7)(8)
BASE-R(9)
(8)
TN/IDL B(6)
TN/IDL C(6)
TN/IDL D (6)
SFP/SFP+/SFP28
(10)(11)
1 Gbps/10 Gbps/25Gbps
Ethernet transmission
External interface; electrical/
optical
Yes 1 RS(7)(8)
BASE-R(9)(8)
A–M SFP/SFP+/SFP28(12)
(13) Radio interface × 12
Interface between baseband
and external radios, optical
All the ports support CPRI
and eCPRI
Line rates:
—CPRI: 2.5 Gbps, 4.9
Gbps, 9.8 Gbps, 10.1
Gbps and 24.3 Gbps
—eCPRI: 10.3 Gbps
and 25 Gbps (14)
Yes - RS(7)(8)
TN E RJ-45 100 Mbps/1 Gbps Ethernet
transmission
External interface; electrical
Yes N/A N/A
SYNC RJ-45 Synchronization interface for
connection of a GNSS
receiver unit, for example,
GRU 04 01
External interface
Yes - -
ALARM 1
ALARM 2
RJ-45 External alarm interface × 2 .
The unit supports eight
external alarms, four per
port.
No - -
SS USB3.1 Type-C for downloading UP from a
memory stick(15) No - -
LMT RJ-45 LMT A interface(16)(17)
LMT B Interface(17)(18)
Synchronization test
interface(19)(20)
Internal and external
interfaces
Yes(21) - -
- Fault
Optical indicator, red
Yes - -
- Operation
Optical indicator, green
Yes - -
- Maintenance
Optical indicator, blue
For information about the
maintenance button, refer to
Yes - -
Baseband Description
8271/1551-LZA 701 6001/1 Uen A | 2020-04-29

Marking Connector Description Optical
Indicator(1) Channels FEC
Indicators, Buttons, and
Switches.
- Status
Optical indicator, yellow
Yes - -
- Fan unit fault
Optical indicator, yellow
Yes - -
(1) For more information about optical indicators, refer to Indicators, Buttons, and Switches
(2) The 19-inch Baseband units have a built-in 10 ms hold-up function.
(3) The unit supports power redundancy. Connect power sources to both power ports. If the power to one port goes
down, a failover will occur automatically to the other power source.
(4) The unit supports 3-wire (DC-I) power feed. It can also support 2-wire (DC-C) power feed by making a jumper
connection in the power cable. Refer to Install 19-Inch Baseband for more information about the power cable pin out,
and Power Cables 2- and 3-Wire.
(5) Auto-negotiation not supported for 25G electrical interface (25GBASE-CR)
(6) Supports synchronization over the transport network.
(7) IEEE802.3 clause 108
(8) Only supported in 25G link speed
(9) IEEE802.3 clause 74
(10) SFP+ is needed for rates higher than 2.5 Gbps.
(11) SFP28 is needed for rates higher than 10 Gbps.
(12) SFP+ is needed for CPRI rates higher than 2.5 Gbps.
(13) SFP28 is needed for CPRI rates higher than 10 Gbps
(14) Depending on the Software Package
(15) Only available when unit is in network loader state
(16) RS-232 interface. Accessed with the LMT splitter cable.
(17) For more information about the LMT interfaces, see Connect Client.
(18) 100 Mbps electrical Ethernet interface.
(19) Compliant with 1PPS 50 Ω phase synchronization measurement interface. Accessed with an adapter.
(20) For more information about the sync test interface, see Manage Network Synchronization.
(21) The optical indicator indicates the status of the LMT B interface.
Do not remove dust plugs from unused ports. Always insert dust plugs into ports
that are not in use by a cable connector.
RJ-45 SFP
Ge19729B
QSFP USB 3.1 Type C–48 V DC
Figure 6 Dust Plugs for RJ-45, SFP28, QSFP, USB, and Power Interfaces
Baseband Interfaces
271/1551-LZA 701 6001/1 Uen A | 2020-04-29 9

6 Standards and Regulations
This section presents a brief overview of standards, regulatory product approval,
and declaration of conformity.
Declaration of Conformity
"
Hereby, Ericsson AB, declares that this Product is in compliance with the
essential requirements and other relevant provisions of Directive 2014/53/EU
and 2011/65/EU. "
6.1 Regulatory Approval
The product complies with the following market requirements:
—European Community (EC) market requirements, Radio Equipment Directive
2014/53/EU and Directive 2011/65/EU.
—Restriction of Hazardous Substances in Electrical and Electronic Equipment
(RoHS) Directive (2011/65/EU).
—North American market requirements.
—Products containing Radio Equipment outside North America and in
countries not recognizing the CE-mark may be labeled according to national
requirements or standards.
6.1.1 Environmental Standards Compliance
The product complies with the following environmental standard:
Europe
—EN 50581 (RoHS)
6.1.2 Safety Standards Compliance
In accordance with market requirements, the product complies with the following
product safety standards and directives:
International
—IEC 60 529 (IP20)
—IEC 62368-1
Baseband Description
10 271/1551-LZA 701 6001/1 Uen A | 2020-04-29

Europe
—EN 60 529 (IP20)
—EN 62368-1
North America
—UL/CSA 62368-1
6.1.3 EMC Standards Compliance
The product complies with the following Electromagnetic Compatibility (EMC)
standards:
International
—3GPP TS37.113
Europe
—ETSI EN 301 489-1
—ETSI EN 301 489-50
North America
—FCC CFR 47 Part 15 B
—IC ICES-003 B
6.1.4 Radio Standards Compliance
The product complies with the following radio standards:
International
—3GPP TS37.141
Europe
—ETSI EN 301 908-1
—ETSI EN 301 908-18
Standards and Regulations
271/1551-LZA 701 6001/1 Uen A | 2020-04-29 11

6.1.5 Marking
To show compliance with legal requirements the product is marked with the
following labels:
Europe
—CE mark
—WEEE
North America
—usETL/cETL
—FCC CFR 47 Part 15 Statement
—IC ICES-003 Statement
China
—Logo2 marking (according to the Ericsson marking instruction 102 01-3086)
6.2 Preventive Maintenance
The product is designed for a technical lifetime of 10 years (24-hour operation).
The following preventive maintenance conditions must be fullled to guarantee
the availability:
—Air Intake
The air intake must be inspected (and cleaned if necessary) every year.
6.3 Spare Parts
The product adheres to the Ericsson Serviceability and Spare Part Strategy.
6.4 Transportation and Storage
For information about transportation and storage of the product, see
Transportation and Storage.
Baseband Description
12 271/1551-LZA 701 6001/1 Uen A | 2020-04-29