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Transition Networks Section I: FBRM/BFFG Product Description
FBRM/BFFG13xx-1xx fiber-to-fiber gigabit models
Gigabit (Gbit)
models
The FBRM100Base-FX-to-1000Base-X and the BFFG 1000Base-X-to-1000Base-X
are the Gbit versions of the IEEE 802.3ah managed Devices. The BFFG models link
Gbit fiber connections; the FBRM models convert 100Base-Fx 100 Mbit/s to Gbit.
These Devices function generally in the same manner as copper-to-fiber FBRMs, the
difference is the way the ports are configured. See Tables 1 and 2.
Table 1: FBRM13xx-1xx 100Base-FX-to-1000Base-X Device
Port Configuration
Port 1: 100Base-FX
• Default setting: 100Mbs and full duplex.
• FEFI (Far-end fault indication) is configurable.
Port 2: 1000Base-X
Default:
• Auto-Negotiation enabled.
• OAM enabled and in Active Mode if chassis Device
(passive if standalone).
Table 2: BFFG13xx-1xx 1000Base-X-to-1000Base-X Device
Port Configuration
Port 1: 1000Base-X
Default: Auto-Negotiation enabled.
Port 2: 1000Base-X
Default:
• Auto-Negotiation enabled.
• OAM is enabled and in Active Mode if chassis Device
(passive if standalone).
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