Modules Functional Descriptions - Cisco GS7000 Installation And Configuration Manual

Modules Functional Descriptions

This table briefly describes each module. The Model GS7000 Optical Hub may not
contain all these modules.
Module
Optical Amplifier
(EDFA)
Optical Switch
Status Monitor/
Local Control
Module
(SM/LCM)
Optical Interface
Board
AC Entry Module The AC entry module is the hub's power entry and power passing
OL-29936-01
Description
Erbium-doped fiber amplifier modules are available in two categories:
broadcast and narrowcast. EDFAs are available in 17 dBm, 20 dBm, and
22 dBm (standard) for broadcasting. A 17 dBm or 21 dBm narrowcast
constant gain EDFA version is available to fit any architecture for
requirements like DWDM narrowcasting. EDFA modules are
single-wide, single-output devices. The modules mount in slots 3
through 6 and 8 through 11 on the optical interface board in the
housing lid. The EDFA is monitored and controlled by the Status
Monitor/Local Control Module in the node.
The optical switch module is used for switching the input of an EDFA
module from a primary signal to a backup or secondary signal. The
module mounts in slots 3 through 6 and 8 through 11 on the optical
interface board in the housing lid. The switch is monitored and
controlled by the Status Monitor/Local Control Module in the node.
The local control module monitors the AC power entry and power
supply DC voltage rails. It can be upgraded to a status monitor which
provides monitoring and control capability at the cable plant's
headend. In a hub application the SM/LCM monitors and controls
the operation of the EDFAs and optical switches. The module mounts
in slot 7 on the optical interface board in the housing lid.
The Optical Interface Board (OIB) provides all interconnections
between the modules in the housing lid of the Model GS7000 Optical
Hub. The modules in the housing lid include the EDFAs, optical
switches, power supplies, and status monitoring/local control
modules. Each module in the lid plugs directly into the OIB through a
connector header or row of sockets. All RF and power cables running
between the housing lid and base also plug into the OIB.
module. AC power enters the module via ports 3 or 6 on the housing.
The module is capable of passing power or providing redundant
powering depending on which shunts are installed. It powers both DC
power supplies and passes information regarding power to the status
monitor in the housing lid via a molded RF cable assembly.
Equipment Description
7