The Cisco® uMG9820 QAM Gateway is a high-density, Gigabit Ethernet-optimized video quadrature amplitude modulation (QAM) product that offers nonstop, high-performance operation for video-on-demand (VoD) services. The Cisco uMG9820 QAM Gateway performs as the IP-to-MPEG-2 gateway between the Gigabit Ethernet transport network and the hybrid fiber-coaxial (HFC) cable network. It is ideal for cable operators requiring cost-effective solutions for their digital video services.
The Cisco uMG9820 QAM Gateway is optimized for Gigabit Ethernet technology. It accepts full line-rate Gigabit Ethernet video transport feeds into a single chassis, providing optimum efficiency (refer to Figure 1). 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. The Cisco uMG9820 QAM Gateway also lowers distribution hub capital expenditures (CapEx) and increases resiliency by reducing the switching costs inherent in other systems with lower QAM densities. Such systems are directly connected to switching devices by means of underutilized Gigabit Ethernet links, wasting port resources.
The modular design of the Cisco uMG9820 QAM Gateway enhances scalability by making it easy to add more QAM channels as VoD service grows. The density of the product can be increased in increments of four to a maximum of a 24 QAM channels. The building-block design of the Cisco uMG9820 QAM Gateway allows the customer to purchase spare components, rather than an entire fixed-configuration system. This lowers the total cost of ownership for in-service video QAM equipment.
High-availability features allow the hot-swappable installation or replacement of QAM modules on active systems in operation. This accommodates future growth and maintenance, while minimizing costly service outages and maximizing uptime. System reliability challenges are further eliminated by the availability of redundant Gigabit Ethernet interfaces, cooling fans, and dual AC power supplies.
The Cisco uMG9820 QAM Gateway is the highest-density Gigabit Ethernet QAM product available for digital video networks. The chassis accepts a minimum of two QAM cards and a maximum of six, for a total of 24 QAM channels in one rack unit (1RU). Each QAM card contains two RF ports capable of generating two QAM channels per port. The QAM card employs a 2:1 block upconverter with two frequency-agile, dual-channel block outputs; its versatility allows the ports to be split across multiple service groups, providing even greater flexibility and easier spectrum management. Fully tested and interoperable with Cisco's industry-leading networking equipment, and complemented by the industry's highest-rated service and support, the Cisco uMG9820 QAM Gateway is a primary element in delivering the next-generation digital video network.
- Modular, single-rack-unit chassis design
- Scalable up to 24 QAM
- 12 RF ports (2:1 block upconverter)
- Four QAM channels per QAM card
- Hot-swappable QAM cards, power supplies, and fan assembly
- Redundant Gigabit Ethernet interfaces
- Dual power supplies
- Field-upgradable software
- Standards-based interoperability
- Reduced VoD service costs
The Cisco uMG9820 processor card accepts MPEG-2 single-program transport streams (SPTSs) encapsulated in UDP/IP datagrams over Gigabit Ethernet. The MPEG-2 SPTS packets are processed and remultiplexed into MPEG-2 multiprogram transport streams (MPTS). MPEG-2 MPTS are then routed to QAM/RF cards for distribution.
- Redundant 1+1 Gigabit Ethernet port configuration (one active plus one backup)
- 10BASE-T/100BASE-TX Ethernet port for out-of-band management network management system (NMS)
- 10BASE-T/100BASE-TX Ethernet port for conditional access system (CAS) traffic
- EIA/TIA-232 console port for direct serial communications with the processor card
- Configurable user transport stream ID
Cisco uMG9820 QAM Gateway Components
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Table 3 Processing Features
Table 4 Network Management
Table 5 Radio Frequency Output Specifications