Cisco Headend System Release 2.7 Design Guide
Hardware Components of an SDV System
4024319 Rev B
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USRM (Optional)
The USRM is available as a software upgrade to the classic SDV Server. The USRM is
designed for high service-velocity as a flexible software platform supporting plug-in
applications and interfaces. You can upgrade the high-availability platform to
support new functionality without interrupting your existing services. New
applications and interfaces inherit existing platform capabilities.
designed for high service-velocity as a flexible software platform supporting plug-in
applications and interfaces. You can upgrade the high-availability platform to
support new functionality without interrupting your existing services. New
applications and interfaces inherit existing platform capabilities.
The USRM demonstrates Cisco’s direction in DBDS evolution toward our next-
generation DBDS control system. It brings a new level of integrated control to VOD
and SDV today, and is designed to quickly enable tomorrow's applications. It is a
standard Intel/Linux-based server that supports many major VOD and SDV
interfaces and protocols. The USRM is integrated with the DBDS and enables
systems to distribute and scale the real-time session and resource management
functions of the DNCS. USRM allows applications to access the network and then
deliver the requested content to edge devices under its control. USRM supports all
standard interfaces.
generation DBDS control system. It brings a new level of integrated control to VOD
and SDV today, and is designed to quickly enable tomorrow's applications. It is a
standard Intel/Linux-based server that supports many major VOD and SDV
interfaces and protocols. The USRM is integrated with the DBDS and enables
systems to distribute and scale the real-time session and resource management
functions of the DNCS. USRM allows applications to access the network and then
deliver the requested content to edge devices under its control. USRM supports all
standard interfaces.
GQAM Modulator and RFGW
SDV requires the use of session-based QAM modulators with Gigabit Ethernet (GbE)
interfaces. At the present time, the GQAM, the XDQA24, and the RFGW meet these
requirements. These devices use QAM techniques to modulate a digital signal onto
an HFC network to deliver voice, video, and data to a DHCT. In the SDV system,
these devices function to bind a program to a session and then join the multicast
group for the program when using Classic SDV Servers, or join the multicast group
for the programs when the USRM builds a session for the program.
interfaces. At the present time, the GQAM, the XDQA24, and the RFGW meet these
requirements. These devices use QAM techniques to modulate a digital signal onto
an HFC network to deliver voice, video, and data to a DHCT. In the SDV system,
these devices function to bind a program to a session and then join the multicast
group for the program when using Classic SDV Servers, or join the multicast group
for the programs when the USRM builds a session for the program.
GQAM Modulator: The SDV architecture allows for sharing of QAM modulators by
multiple applications, including SDV, VOD, traditional broadcast, and any new
application requiring narrowcast bandwidth. For additional information on VOD
interoperability, see Video-on-Demand (on page 5).
multiple applications, including SDV, VOD, traditional broadcast, and any new
application requiring narrowcast bandwidth. For additional information on VOD
interoperability, see Video-on-Demand (on page 5).
XDQA24: The XDQA24 is a compact QAM array designed for routing, multiplexing,
QAM modulation, and RF up-conversion. It allows participation in SDV, XOD,
broadcast, and data applications.
QAM modulation, and RF up-conversion. It allows participation in SDV, XOD,
broadcast, and data applications.
RFGW: The RFGW is a universal edge-QAM device that offers industry-leading
performance, and a standards-based solution for video, data, and converged video
and data deployments requiring high density and maximum reliability. For
additional information, refer to Cisco RF Gateway Series RFGW-1 System Guide (part
number 4024958).
performance, and a standards-based solution for video, data, and converged video
and data deployments requiring high density and maximum reliability. For
additional information, refer to Cisco RF Gateway Series RFGW-1 System Guide (part
number 4024958).
Netcrypt Bulk Encryptor
The Netcrypt Bulk Encryptor is a network-attached encryption device designed for
systems that use MPEG transport over user datagram protocol (UDP), IP, and
Ethernet. The Netcrypt Bulk Encryptor has a maximum throughput of 4 gigabits per
second, and is capable of encrypting up to 4000 input programs into a maximum of
4000 transport streams suitable for digital broadcast (switched or linear) and VOD.
systems that use MPEG transport over user datagram protocol (UDP), IP, and
Ethernet. The Netcrypt Bulk Encryptor has a maximum throughput of 4 gigabits per
second, and is capable of encrypting up to 4000 input programs into a maximum of
4000 transport streams suitable for digital broadcast (switched or linear) and VOD.