3Com NBX, Руководство по установке

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NBX Cards and Devices 45
10BASE-T Uplink Card The 10BASE-T Uplink Card provides eight 10BASE-T Ethernet ports to
connect 3Com Telephones (or other 10BASE-T devices) to the LAN. The
Uplink Card replaces the 10BASE-T Hub Card.
Figure 16 NBX Uplink Card (3C10370)
The NBX 10BASE-T Uplink Card contains these lights and connectors:
■
Status Lights (PWR and 1 through 8) — These lights indicate the
status of power to the hub and the status of the 10BASE-T ports.
■
Ethernet Hub Ports (8) — These RJ-45 MDI-X ports connect devices
to the LAN.
Analog Terminal Card Each Analog Terminal Card allows connections for up to four analog
(2500-series compliant) telephones and Group-3 fax machines. When an
Analog Terminal Card senses that a port is being used for fax
transmission, it switches that port to
reliable mode. Unlike voice transfers,
which drop packets due to congestion, reliable mode transmissions take
as much time as needed to ensure that there are no lost packets.
However, reliable mode also uses twice the bandwidth.
CAUTION: If you are using the 3Com SuperStack ARPS (Advanced
Redundant Power Source) as a backup power supply for the V5000
Gateway Chassis, you can have no more than 2 Analog Terminal Cards of
Models 3C10117, 3C10117A, or 3C10117B-INT per Gateway Chassis.
This restriction does not apply to the 3C10117C Analog Terminal Card.
Figure 17 NBX Analog Terminal Card (3C10117B-INT)
PWR
1
1 2 3 4 5 6 7
8
8
3C10370 3Com NBX Uplink Card
3C10117B-INT 3Com NBX Analog Terminal Card
CONSOLE
2 3 4 1
1 2 3 4
NOT FOR TELECOM USE