Cisco Prisma II Installation And Operation Manual page 13

Overview of the bdr Transmit Processor,
Prisma II bdr 2:1 Redundant Transmit Processor Operation
The Prisma II platform supports Cisco's Baseband Digital Reverse technology. The
Prisma II bdr Digital Reverse 2:1 Multiplexing System includes a unique approach
for incorporating network redundancy. At the transmit end of the system, typically
in a hub or remote terminal, two 5 to 42 MHz analog reverse path signals are input
to a transmit processor. The transmit processor converts each signal to a baseband
digital data stream and time division multiplexes the two streams into a single data
stream. The data stream is duplicated to enable routing for redundant optical
transport.
One (non-redundant application) or two (redundant application) transmitter sub-
modules installed within the transmit processor, convert the baseband data stream
to an optical signal for transmission at either 1310 nm or 1550 nm ITU grid
wavelengths. ITU grid wavelengths are used for Dense Wave Division Multiplexing
(DWDM) applications.
On the receive end, typically in a large hub or headend, one or two Prisma II bdr
Optical Receiver sub-modules located in a Prisma II bdr Receive Processor receive
the optical signal and perform conversion back to the baseband data stream. The
Prisma II bdr Receive Processor demultiplexes the data stream and converts the two
resultant data streams back to two analog RF signals.
The Prisma II bdr 2:1 Redundant Transmit Processor can be controlled by an ICIM,
the LCI software, or TNCS software. Prisma II bdr 2:1 Redundant Transmit
Processor is not compatible with previous Prisma bdr receivers, and should only be
paired with Prisma II bdr Receive Processors.
Optical Output
Optical output connectors for the Prisma II bdr 2:1 Redundant Transmit Processor
are SC/APC and should only be mated with SC/APC connectorized jumpers or
fiber connectors.
WARNING:
Avoid damage to your eyes! Do not look into any optical connector while the
system is active. Even if the unit is off, there may still be hazardous optical
levels present.
78-715192-01 Rev C
Continued
Introduction 1-3