Specifications

A.6 DECconcentrator 900FH
A–8 FDDI Configuration Capabilities
A.6 DECconcentrator 900FH
The DECconcentrator 900FH is a sixteen port FDDI concentrator (fourteen front
panel ports and two backplane ports). The two backplane ports, see Figure A–5,
attach to a DEChub 900 MultiSwitch backplane or to a DEChub ONE-MX docking
station that supports ModPMDs.
Twelve of the front panel ports are fixed multimode fiber (MMF), SC optics connec-
tions. The two remaining ports can be configured for either UTP, multimode fiber
(MMF), or single mode fiber (SMF) by the addition of ModPMD modules.
A.6.1 Port Assignments
ModPMD Port 1 can be configured as either an A or M port and ModPMD Port 2
can be configured as either a B, S, or M port. The two backplane ports are also soft-
ware configurable through MultiChassis Manager or the Setup Port menu. Therefore,
both dual ring and tree connections can be supported.
Figure A–5 DECconcentrator 900FH Port Configuration Capabilities
Front Panel Ports
LKG-10124-96F
Backplane Ports DEChub ONE-MX ModPMD Ports
Front Panel Ports
A/M B/S
A/M M
DECconcentrator 900FH
B/S/M M
A/M B/S
A/M M
DECconcentrator 900FH
B/S/M M