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7.7 8260 Ethernet 10-Port 10Base-FB Module
The 8260 Ethernet 10-Port 10Base-FB Module is a 10-port module that complies
with the 10Base-FB standard and supports backbone and to-the-desk connectivity
over fiber optic cabling.
To provide backbone connectivity, the 8260 Ethernet 10-Port 10Base-FB Module
can be connected via a fiber cable to one of the following:
•
An 8260 using 8260 10-Port 10Base-FB module
•
An 8260 using 8250 2/4-port 10Base-FB module
•
An 8250 using 8250 2/4-port 10Base-FB module
•
A third party hub using a 10Base-FB compliant module
This module supports 50/125, 62.5/125, 85/125 or 100/140 micron duplex fiber
rated at 150 MHz or better and can be ordered with either ST, FC or SMA-type
connectors. You should use different part numbers and feature codes when
ordering this module with different connector types.
In general, on 62.5 micron cable, you can go up to a maximum of 4000 meters
(when the module is set to operate at high power mode) point-to-point using
8250 and/or 8260 10Base-FB modules. However, if you have poor quality cable,
splices or many patch panels, you may have to reduce this distance.
The workstations connecting to this module should use either the IBM 10Base-FB
Transceivers or any transceiver which fully complies with the 802.3 10Base-FB
standard.
The 8260 Ethernet 10-Port 10Base-FB Module provides the following features:
•
Per-port switching
Each port can be connected to one of the eight segments on the backplane.
Also, the module provides four isolated segments to which the individual
ports on the module can be attached. These isolated segments can be used
to set up segments consisting of the users attached to that module without
using any backplane resource.
Note
The 8260 Ethernet 10-Port 10Base-FB Module supports any combination of
backplane and isolated segments. So, you have the freedom to assign
any of the 10 ports to any of the backplane or isolated segments.
•
Support for 1 E-MAC
This module provides the mounting for one E-MAC. The E-MAC can be
assigned to any of the Ethernet segments on the backplane, or any of the
isolated segments on this module. Note that the E-MAC mounted on this
module cannot collect per-port or per-module statistics about the 8250
modules.
•
Support for 1 Ethernet security card
In addition to mounting for the E-MAC, this module provides the mounting for
one Ethernet security card. The Ethernet Security card provides for
eavesdropping and intrusion control for your Ethernet segments. For
Chapter 7. 8260 Ethernet Modules 113