Cisco uMG9800 Series Digital Video Networking Products

Cisco uMG9850 QAM Module Data Sheet

Table Of Contents

Data Sheet

Optimized for Gigabit Ethernet Networking

Flexible Modular Design


Integrated Solution

Key Features


Data Sheet

Cisco uMG9850 QAM Module

The Cisco® uMG9850 QAM Module provides the most versatile solution for Gigabit Ethernet-based digital video networks integrating switching, optics, and quadrature-amplitude-modulation (QAM) functions on one platform—the Cisco Catalyst® 4500 Series Switch—to simplify network architectures delivering video-on-demand (VoD) services. Performing as the IP-to-MPEG-2 gateway between the Gigabit Ethernet transport network and the hybrid fiber-coaxial (HFC) cable network, the Cisco uMG9850 QAM Module provides high-performance operation for QAM modulation and upconversion of digital video. The Cisco uMG9850 QAM Module consists of 12 RF ports generating two QAM channels per port for a total of 24 QAMs per module.

Optimized for Gigabit Ethernet Networking

The Cisco uMG9850 QAM Module is optimized for Gigabit Ethernet technology, accepting full line-rate Gigabit Ethernet video transport feeds to provide optimum efficiency. There is no longer a need to daisy-chain QAM devices, eliminating the single point of failure present in the first QAM device in the chain. Configuring multiple Cisco uMG9850 QAM modules into a single chassis provides the ability to switch any video stream from an outgoing Gigabit Ethernet video server port to any QAM channel, fully utilizing the capabilities of Gigabit Ethernet networking. The Cisco uMG9850 QAM Module also lowers distribution hub capital expenditures (CapEx) and reduces the number of devices to be managed.

Figure 1

uMG9850 QAM Module

Flexible Modular Design

The modularity of the Cisco Catalyst 4506 and 4507R Switches accommodates up to five Cisco uMG9850 QAM modules, offering a maximum of 120 QAM channels. This modular solution enhances the scalability by making it easy to add more QAM channels as VoD service grows through the building-block design of the platform. Customers can now purchase spare QAM modules only, rather than an entire fixed-configuration system, lowering the total cost of ownership for in-service video QAM equipment. The Cisco uMG9850 QAM Module also can be mixed with other Cisco Catalyst 4500 Series line cards, further adding to the flexibility of the solution.


The platform supports hot-swappable QAM modules on active systems in operation by taking advantage of the high-availability features built for the system. This accommodates future growth and maintenance, while minimizing costly service outages and maximizing uptime. The platform also offers redundant power supplies, cooling fans, and central processing engines.

Integrated Solution

Integrating switching, optics, and QAM intelligence into a modular chassis simplifies network design and reduces operational costs. Customers can achieve greater investment protection through the flexibility of the product to evolve as service and capacity requirements increase. The Cisco uMG9850 QAM Module reduces the number of devices needed and provides better manageability than multiple standalone QAMs.

As Cisco Systems® continues to develop intelligent video edge solutions for current and future video services, the Cisco uMG9850 and the Cisco Catalyst 4500 Series provides the foundation for the next-generation digital video network.

Key Features

24 QAMs channels per line card, 12 ports carrying up to 2 QAMs each

64 and 256 QAM modulation

Two switched GigE ports per module (RJ-45, SFP)

Network jitter reduction—Up to 200 ms, user configurable

MPEG-2 remultiplexing—PID filtering and remapping, PSI generation and insertion, PCR restamping

Video session management—Session timers and statistics

Network management—Cisco Command-Line Interface (CLI), SNMPv1, SNMPv2c ; Cisco Video MIB

Software-configurable ASI video monitor port


Table 1  


Operating temperature

32º to 104ºF (0º to 40ºC)

Nonoperating temperature

-55º to 125ºF (-48º to 52ºC)

Nonoperational altitude

Sea level to 15,748 ft (4800 m)

Input voltage

100 to 240 VAC

Input frequency

40 to 70 Hz

Input current

16A or 7A

Dimensions (H x W x D)

1.75 x 15 x 10 in. (4.45 x 38.1 x 25.4 cm)

EMI standards

CFR47: 2000, FCC Part 15, Subpart B for Class A; Industry Canada ICES-003 for Class A

Safety standards

UL 60950 (US); CAN/CSA C22.2, No. 60950 (Canada)

Operational / Environmental / Safety / Regulatory

Table 2  


Input interface

1 Small Form-Factor Pluggable (SFP) port connector, 1 RJ-45

LAN protocol

IEEE 802.3z

Data rate per port

1000 Mbps (SFP), 10/100/1000 Mbps (RJ-45)

Data format

UDP datagram encapsulation of MPEG-2 single-program transport stream (SPTS)

Maximum of 600 MPEG-2 SPTS encapsulated in UDP/IP

Up to 15 PIDs per program (including ECM PID)

Up to seven 188-byte MPEG-2 packets per UDP datagram

3 to 4 Mbps per SPTS (nominal)


Table 3  Processing Features


Function capability

PID remapping

PID filtering

MPEG-2 re-multiplexing

PCR re-stamping

MPEG-2 PSI extraction, generation, and insertion

Input network jitter buffer (user-settable latency; maximum 200 ms)

Table 4  Network Management


Management connectors

1 RJ-45 connector: via supervisor module

Management protocols



Command-line interface

Table 5  Radio Frequency Output Specifications


QAM modulation

64 and 256 QAM

Framing structure, channel encoding, modulation

Compliance with ITU-T Recommendation J.83 Annex B

MER (before equalizer)

> 35 dB

MER (after equalizer)

> 42 dB


1e-13 (pre-FEC)

Output interface

F Connector, nominal impedance 75 ohms

Frequency range

53 to 860 MHz

Frequency step size

12.5 kHz

Output level

+45 dBmV to 53 dBmV per QAM channel

Output level step size


Return loss

14 dB, in channel

Table 6  Ordering Information

Table 6 gives ordering information for the Cisco uMG9850 QAM Module.

Part Number


Cisco Catalyst 4500 QAM Module, 12 RF ports, 24 QAM channels, Annex B