Cisco Laser Link Ancillary Modules 安装指南
1-2
General Information
78-4028521-01 Rev B
Laser Link System Equipment Description
Overview
The Laser Link
system is used to transport broadband telecommunications signals
on fiber optic cable. The Laser Link system consists of a mainframe (standard or
mini), power supplies, and a family of modules including transmitters (upstream
and downstream), optical/RF amplifiers, receivers (upstream and downstream),
block up/down converters, and RF/optical switches.
Mainframe Functional Description
The Laser Link III Mainframe performs four essential functions in the overall system
application:
•
•
Housing the Laser Link modules
•
Powering the modules
•
Routing control and status signals to and from the modules
•
Cooling
Instructions pertaining to the installation of specific modules are provided in the
Installation and Operation Guide accompanying each module. Functional
descriptions of power distribution and status monitoring of modules are contained
in this section.
Laser Link Equipment
The Laser Link modules accommodated by the Laser Link III Mainframe include the
following:
•
•
Transmitter 1310 nm/45–870 MHz, LLT III (half-width)
•
Transmitter 1550 nm/45–870 MHz, LEMT (full-width)
•
Narrowcast Transmitter 1550 nm/45–870 MHz, LLNT (full-width)
•
Narrowcast Return Transmitter 1550 nm/5–200 MHz, LLNTR (full-width)
•
Optical Amplifier C-Band, LLOA (full-width)
•
Return Receiver – 5–210 MHz, ELLRR-S (half-width)
•
Receiver 50–870 MHz, LLFR (full-width)
•
Return Transmitter 1310 nm/5–210 MHz, LLRT (full-width)
•
Dual Amplifier, 870 MHz, LLDA (full-width)
•
RF Switch 5 MHz–1 GHz, LLRS (half-width)
•
Block Converter, LLUC/LLDC (half-width)