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Magnum 700X Mini-Concentrators Installation and User Guide (05/98)
GARRETT
14
2.4 Bridge Port Modules (BPMs)
To provide optional local segment isolation, individual Bridge Port Modules (BPMs)
are available for Magnum 700Xs. For flexibility, any port of a Magnum 700X may be
configured with a BPM. Multiple (up to 6) BPMs may be configured in one 700X chassis..
There are four different BPM cards and each is designed with its own media connector
type. BPMs are available for the following Ethernet media types: BNC (ThinNet or 10BASE2),
AUI (10BASE5 or ThickNet, DB-15 female for most transceiver connections), ST (Ethernet
multi-mode Fiber ST), and RJ-45 (10BASE-T UTP and STP). They are shown in Figure 2.4.
Each BPM is usually factory installed, but may be field installed by trained technicians as
described in Section 3.0, Installation.
Figure 2.4: Magnum BPM Cards: BPM-TP, BPM-BNC, BPM-ST, BPM-AUI
Each of the individual BPMs are described in detail in this section.
2.4.1 BPM-BNC
The Magnum BPM-BNC bridge module is equipped with a standard 10BASE2 coax
connector. This BPM is self-learning and filters and forwards packets at full Ethernet wire
speed. This module is used for 10BASE2 ThinNet (commonly referred to as BNC) connections
and is designed to isolate the local segment (i.e., the users and devices connected to the Magnum
unit housing the BPM) from the connecting
network (i.e., the users and devices
connected through the BPM’s media
connector).
The BPM-BNC module is
designed with a special switch -selectable
internal termination function that eliminates
the need for a "tee" connector and a 50 ohm
terminator. For switch details, refer to
Magnum BPM-BNC
Standard BNC
10BASE2 Connector
Internal Termination
Slide Switch
1
2
FWD-X LED
FWD-I LED
2
1