Cisco Universal Small Cell 3000 Series

Cisco Universal Small Cell 3331 Data Sheet

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The Cisco® Universal Small Cell (USC) 3331 is part of the Cisco Small Cell Solution, an end-to-end platform that integrates third-generation (3G), Long Term Evolution (LTE), and carrier-grade Wi-Fi with self-organizing network (SON) technologies and backhaul for an efficient and secure heterogeneous network (HetNet). The Cisco USC Series provides the right access point for every environment, from the home to the enterprise to high-density urban environments such as venues (Figure 1). This product is designed to operate in the home and small office environment.

Figure 1. Cisco Universal Small Cell Series

Product Overview

The Cisco USC 3331 (Figure 2) takes advantage of the latest generation of small cell technologies, advanced industrial design, and the end-to-end Cisco Small Cell Solution to deliver a highly compact small cell product. The Cisco USC 3331 offers mobile operators a quick-to-deploy licensed radio network element for the home or the small office and home office (SOHO) market, creating a platform for mobile broadband services.

The Cisco USC 3331 is standalone customer premises equipment (CPE) and contains a dedicated 3G small cell base station that can efficiently deliver mobile services indoors while offloading traffic from the outdoor macro network. This provides a better mobile user experience, and it also reduces costs by eliminating the need for additional macro base station sites and reducing the backhaul infrastructure required to support small cell deployments, by using existing home or small office broadband services.

Figure 2. Cisco USC 3331: A Standalone 3G Small Cell for Homes, Small Offices, and Home Offices

Cisco USC 3331 Benefits

Three main challenges face mobile operators interested in deploying licensed small cells: where to place them, how to power them, and how to backhaul the traffic. Cisco solves these problems with innovation. Building on a heritage of commercially proven, robust, award-winning 3G access point design, the Cisco USC 3331 is a fully integrated, high-performance, low-cost 3G small cell. The benefits of the Cisco design include:

Reduced network costs and operations: The intelligence within the solution means the product only requires end users to connect the device to their broadband connection and power source. After that, the device will automatically configure itself and enter into service.

Carrier-grade 3G base station technology: The Cisco USC 3331 provides the technology equivalent to macro cellular service within the home. It is fully managed by the mobile operator and provides a 3G signal inside the building for voice, data, and messaging services. The Cisco USC 3331 supports up to four or, optionally, eight simultaneous users within a coverage area of approximately 1000 square feet (100 square meters) with no interference to customers not using the device.

Secure Solution: The device is secure on both the air interface from the access point to the users’ device and on the broadband Internet link. The device uses software signatures and encryption to protect against tampering. In the unlikely event that the device is compromised, it will automatically recover to a known secure state.

Standards-based technology: The Cisco USC 3331 operates as a Home Node B (HNB) in the standard 3rd Generation Partnership Project (3GPP) architecture for small cells and is connected to the network using the specified Iuh interface. This architecture provides a rapid deployment model for the operator reusing an existing HNB network infrastructure.

Superior indoor signal strength: The Cisco USC 3331 provides coverage signal throughout the home or SOHO, resulting in excellent voice quality.

High data speeds for an enhanced multimedia experience: By providing local 3G connectivity, operators can support data throughput speeds on mobile devices that outpace what is available from the macro network in the poor signal conditions typically found indoors.

Simplicity and convenience: Subscribers can use their existing mobile phones and applications, and standards-based, zero-touch provisioning allows end users to install the platform quickly and easily.

Features and Benefits

Table 1 lists specific features and the accompanying benefits of the Cisco USC 3331.

Table 1. Cisco USC 3331 Features and Benefits



Base Station Features

3GPP Release 8 support for Wideband Code Division Multiple Access (WCDMA) and Evolved High Speed Packet Access (HSPA and HSPA+)

Support for 3GPP standard 3G/WCDMA handsets and dongles: This includes a wide range of global smartphone handsets, including Apple iPhones, Android devices, Blackberry, Microsoft Windows Phone, and handsets and dongles from a wide range of global suppliers, including HTC, Samsung, Apple, RIM, Nokia, and Motorola

R99 voice support

High-quality voice call on mobile devices using global mobile standards: The device can support up to 4 and, optionally, 8 voice calls (dependent on installed licenses)


Packet data support for high-speed Internet and intranet communications using packet data upload and download

Adaptive power output

Matched to the coverage needs inside the home


Support for user moving between the small cell to the macro network

Timing support

High-stability oscillator and network timing interface that allows the Cisco USC 3331 to successfully interwork with local macro networks

Network listen

Automatic radio environment monitoring of the licensed spectrum bands: The network listen features run at module start-up and continuously during operation to provide real-time monitoring of the surrounding 2G and 3G networks and allow the Cisco USC 3331 to automatically adapt to changes in the environment


Zero-touch mechanism, allowing the device to automatically install the correct software versions and then be configured with the parameter set from network management system: Based on the configuration, the device will intelligently configure itself to provide optimal service

Standards-based network interface

Support for the Iuh standard interface, using a TR-069 management interface

Standalone Design

Form factor

The product is designed as a small form-factor device acceptable to consumers, which can be located easily within the home along with a broadband/Wi-Fi router. There is a single easily visible LED to show the status of the device, which helps with troubleshooting. The antennas are all internal. Power is supplied through an external power block provided with the device


There is an on/off switch and a recessed reset button. The reset button is only used to recover the unit to an operating state in case of major software failure or configuration error

Rapid installation

The device is designed to be installed by end users without any specialist skills. The zero-touch capability means that it can be installed in less than 10 minutes with a connection to the home Internet router using a standard Ethernet cable

Remote management

The device is managed by the operator’s management system, which can resolve issues remotely. In case of major failure, the device supports a factory recovery capability where it can automatically recover through the Cisco Universal Small Cell CloudBase solution

Product Specifications

Table 2 lists the detailed product specifications and part numbers for the Cisco USC 3331.

Table 2. Cisco USC 3331 Product Specifications



Product variants

Product ID USC3331-AJ-K9

3G Band 1 (2100 MHz BS TX)
3G Band 8 (900 MHz BS TX)
2G GSM 900 and GSM 1800

Product ID USC3331-BJ-K9 Band 2/5 support will be provided at a later date


The device operates with Cisco Small Cell release R 3.4 or later

Small cell gateway compatibility

The device supports Iuh and can operate with standards-based Iuh gateways

Antenna type

1x1 SISO Internal

Bands supported

Product ID USC3331-AJ-K9

Operational 3GPP Band 1

BS Receive 1920-1980 MHz

BS Transmit 2110-2170 MHz

Listening bands

3G Band 1 (2100 MHz BS TX)
3G Band 8 (900 MHz BS TX)
2G GSM 900 and GSM 1800

UARFCN supported

3GPP Band 1

Uplink (UL) 9612 to 9888 and Downlink (DL) 10562 to 10838

Bandwidth supported

5 MHz per 3GPP Standards for WCDMA Release 8

User count

8 in a variety of combinations including circuit-switched voice (R99) or packet-switched data

3GPP standards

3GPP Release 8

3GPP standard interfaces

Iuh per 3GPP TS 25.467 Release 8

Radio access bearers (RABs) supported

Signaling radio bearer (SRB)

Standard 3.4 kbps

R99 Circuit-Switched Channel

8 Dedicated Channel (DCH) with adaptive multirate (AMR) 12.2 kbps codec
8 DCH plus 8 users in Fast Access Channel (FACH)
7 DCH with circuit-switched video

Packet-switched data: R99 circuit-switched packet mode

Up to 8 DCH

64/64 kbps

64/128 kbps

64/384 kbps

128/64 kbps

128/128 kbps

128/384 kbps

384/384 kbps

Packet-switched data: R99 circuit-switched uplink plus High-Speed Downlink Packet Access (HSDPA)

Up to 8 DCH plus High-Speed Dedicated Channel (HS-DCH)
HSDPA support up to 14.4-Mbps peak rates supported

64 kbps/HSDPA

128 kbps/HSDPA

384 kbps/HSDPA

Packet-switched data: HSPA

Up to 8 active, scheduled high-speed users
Up to 14.4-Mbps HSDPA peak rates supported
5.76-Mbps High-Speed Uplink Packet Access (HSUPA) peak rates supported

Packet-switched data: HSDPA+

Up to 8 active, scheduled high-speed users

Up to 15-Mbps HSDPA+ peak rates supported

14 codes supported

5.76-Mbps HSUPA peak rates supported

Multiple RAB (mRAB) combinations supported

Up to 8 MRAB users (3GPP code tree dependencies)
One HSPA/HSDPA+ channel and one R99 AMR channel active
Dual HSPA/HSDPA+ channels active
Dual HSPA/HSDPA+ channels and one R99 channel active

Realistic data rates: Cisco notes that the rates above for HSPA and HSDPA+ are peak, theoretical rates.

Bandwidth supported

5 MHz per 3GPP Standards for WCDMA Release 8

User count

Up to 4 and, optionally, 8 simultaneous circuit-switched calls and packet-switched data services. The number of users supported will vary based on the traffic loading and user capacity license installed.

Data model

Broadband Forum TR-069 Amendment 2 with TR-196v1

Network connectivity

IP Security (IPSec) and optionally Transport Layer Security (TLS)

Data model extensions

Certain extensions are available to simplify operation and address missing features from the TR-196v1 data model (for example, timers and thresholds for improved operation)

Data model provisioning

TR-069 through IPsec link is supported

Access method

Support for open- and closed-mode deployments

Software upgrade


3G airlink cipher

3GPP UEA1 and UIA1 (also known as Kasumi cipher)


IPsec Tunnel Mode and TLS for TR-069 remote management

Backhaul tunnel management

Internet Key Exchange (IKE) v2

Security model

Secure boot and signed software image

Periodic network listen, also known as downlink monitor mode (DLMM)

3G and GSM

Continuous service network listen


RF power level (dBm/mW)

13 dBm/20 mW, measured at the antenna port

3G RF noise figure

8 dB


Safety per EN IEC60950-1 and UL/CSA 60950

EMC Exposure per EN62311

Meets 3GPP 25.141

RF Regulations

CE Mark

Green Initiative Compliant to RoHS

Regulatory approval

Band 1 : CE Approval

Band 2/5 UL Approval

Operating conditions

Temperature: 32 to 104ºF (0 to 40º C)

Humidity: 5 to 90% non-condensing

Power consumption



Approximately 300 g


5 x 5 x 1.4 in. (12.7 x 12.7 x 3.6 cm)

Ordering Information

The Cisco USC 3331 is available for sale to service providers that have WCDMA, HSPA, and HSPA+ technologies, as well as current spectrum assets in the 3G Band 1 (2100 MHz) or Band 2/5 (1900 or 850 MHz) at a later date. Tables 3 and 4 provide hardware and software ordering information. For detailed ordering information, see the product ordering guide.

Table 3. Cisco USC 3331 Hardware Ordering Information

Product Name


Order Code

Cisco Universal Small Cell USC 3331 (Band 1)

3G Standalone Band 1; 20mw, 1x1 SISO; Closed mode ready, HSDPA+ ready, High Data Mobility ready.


Cisco Universal Small Cell USC 3331 (Band 2/5 Version)

This product will be supported at a later date. 3G Standalone Band 2/5; 20mw, 1x1 SISO, Closed and Open Access ready, HSDPA+ ready, High Data Mobility ready, options.


Table 4. Cisco USC 3331 Software Ordering Information

Product Name


Order Code

WCDMA Base Load

USC3000 Base load for 3G 4 users, Iuh, closed access, 3GPP R8 in EULA/SULA


WCDMA 8 user upgrade

Upgrade from 4 to 8 users


WCDMA 4 User Open Access

Open access for 4 users


WCDMA 8 User Open Access

Open access upgrade from 4 to 8 users



HSDPA+ support


WCDMA Cell Broadcast PWS

Cell Broadcast


WCDMA SW Provisioning

USC CloudBase 3331 Provisioning


System Requirements

Table 5 lists the system requirements needed for successful deployment of the Cisco USC 3331 in a Cisco solution.

Table 5. Cisco USC 3331 System Requirements

Software release

Cisco Universal Small Cell Software R3.4 or later
Cisco Small Cell System (SCS) R3.0 or later

WCDMA network

The Cisco USC 3331 requires a standards-based Iuh HNB gateway (HNB-GW), usually using a security gateway to terminate IPSec, for communication with existing 3G core network using Iu interfaces. This HNB-GW can be separately provided by Cisco as functionality available on the Cisco ASR 5000 Series.

Management system

The Cisco USC 3331 requires a TR-069-compliant management system to manage the hardware and WCDMA capabilities of the product.

Power supply

The Cisco USC 3331 comes with a power block to convert from AC power to DC. It therefore requires 240 or 110 VAC mains power supply.

Internet backhaul

The Cisco USC 3331 requires suitable Internet-based backhaul to handle WCDMA HSPA traffic.


The Cisco USC 3331 includes a one-year limited hardware warranty with 30-day return for repair. More detailed warranty information is available on at the Product Warranties page.

Cisco Small Cell Services

The Cisco Small Cell Solution is delivered by Cisco Services, an organization with unparalleled experience and expertise implementing large commercial small cell deployments, as well as providing world-class systems and service integration. With specialized tools, knowledge, methodologies, best practices, and a collaborative delivery model that combines Cisco expertise with our partners' and customers' capabilities, Cisco Services achieves superior results. We help service providers to mitigate risk, accelerate time to market for new revenue-generating services, lower total cost of ownership, increase the value of investments, and improve the customer experience through service assurance.

The Cisco Services team delivers comprehensive support, encompassing the service provider's entire network lifecycle. Through a lifecycle approach to services, Cisco has developed consistent and proven methodologies to help service providers successfully design and deliver new service offerings. These services are customized to operator needs and are delivered through an extensive global support infrastructure, which includes the award-winning Cisco Technical Assistance Center (TAC), Cisco Services resources, Centers of Excellence, small cell interoperability testing (IOT) and system verification test (SVT) labs, and ecosystem partners.

For More Information

For more information about the Cisco USC 3331, visit or contact your local account representative.