Cisco Model D-PCG1000 PowerKEY CAS Gateway Installation Guide
Chapter 1 Introducing the NOBE
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4012215 Rev B
NOBE Functional Overview
The NOBE is a powerful network-attached encryption device designed for broadcast
applications in systems that use MPEG transport over UDP, IP, and Ethernet. The
unit is supported in DBDS System Release (SR) 4.3 and later.
applications in systems that use MPEG transport over UDP, IP, and Ethernet. The
unit is supported in DBDS System Release (SR) 4.3 and later.
The NOBE is designed to be used in an Overlay™ environment where different
conditional access (CA) systems, such as Motorola DigiCipher and Cisco
PowerKEY™, coexist in a coherent manner. Overlay technology assumes that a
PowerKEY DBDS network is laid over an existing but different cable network, such
as a Motorola network. This technology gives cable service providers the ability to
offer value-added services and technologies that Explorer
conditional access (CA) systems, such as Motorola DigiCipher and Cisco
PowerKEY™, coexist in a coherent manner. Overlay technology assumes that a
PowerKEY DBDS network is laid over an existing but different cable network, such
as a Motorola network. This technology gives cable service providers the ability to
offer value-added services and technologies that Explorer
®
Digital Home
Communication Terminals (DHCTs) provide and still support existing third-party
DHCTs.
DHCTs.
Although compact, the NOBE is capable of encrypting a maximum of 17 multi-
program transport streams suitable for digital broadcast.
program transport streams suitable for digital broadcast.
Network-Attached Encryption
The NOBE is designed to be connected to a switch or router network using four
Gigabit Ethernet (GbE) ports in bi-directional mode as shown in the following
figure. In this application, Quadrature Amplitude Modulation (QAM) modulator
edge devices are connected to other ports on the GbE switch either directly or
remotely through other network transport equipment. Clear content arrives from
video sources and is sent to both the NOBE and the third-party encryption device,
such as the SmartStream Encryptor Modulator (SEM), through the switch. The third-
party encryption device encrypts the content and sends it to the NOBE, again
through the switch. The NOBE then has both a clear copy and an encrypted copy of
the same program stream, and it creates a partially encrypted output stream, which
is sent back to the GbE switch for distribution through other ports. Any combination
of ports can be used.
Gigabit Ethernet (GbE) ports in bi-directional mode as shown in the following
figure. In this application, Quadrature Amplitude Modulation (QAM) modulator
edge devices are connected to other ports on the GbE switch either directly or
remotely through other network transport equipment. Clear content arrives from
video sources and is sent to both the NOBE and the third-party encryption device,
such as the SmartStream Encryptor Modulator (SEM), through the switch. The third-
party encryption device encrypts the content and sends it to the NOBE, again
through the switch. The NOBE then has both a clear copy and an encrypted copy of
the same program stream, and it creates a partially encrypted output stream, which
is sent back to the GbE switch for distribution through other ports. Any combination
of ports can be used.