Cisco Cisco Prisma II ICIM 安装指南
78-748705-01 Rev C
Introduction
1-3
Prisma II bdr 2:1 Dual Transmit Processor Overview,
Continued
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.
On the transmit end of the system, typically in a hub or remote terminal, two 5-to-42
On 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 processor. The processor converts
each signal to a baseband digital data stream and time division multiplexes the two
streams into a single data stream.
Each processor can convert four 5-to-42 MHz signals into two digital data streams
Each processor can convert four 5-to-42 MHz signals into two digital data streams
with one data stream feeding each of the optical transmitters.
The optical transmitter installed within the processor converts the baseband data
The optical transmitter installed within the processor converts 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 of this system, typically in a large hub or headend, each
On the receive end of this system, typically in a large hub or headend, each
independent Prisma II bdr Optical Receiver located in the processor receives the
optical signals and convert them back to the baseband data stream. The receive
processor demultiplexes the data stream and converts the two resultant data streams
back to two analog RF signals.
The processor can be controlled by an Intelligent Communications Interface Module
The processor can be controlled by an Intelligent Communications Interface Module
(ICIM), the LCI software, or TNCS software. The Prisma II bdr 2:1 Dual Transmit
Processor will only operate with a Prisma II bdr 2:1 Dual or 2:1 Redundant Receive
Processor. It is not compatible with Prisma II bdr 4:1 Redundant Receive Processors
or previous Prisma bdr products.
Optical Output
Optical input connectors for the processor are SC/APC.
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.