3Com V3000 ANALOG, Installation Manual

Page: 47 / 252

NBX Cards and Devices 47
■
10/100 Uplink — This RJ-45 Ethernet connector connects the card to
an external LAN.
■
Console — This DB-9 connector provides an RS-232 (DCE) TTY
terminal connection for maintenance access. For information on how
to connect a computer to the Console port, see
“Connecting a
Computer to a Console Port” on page 196 .
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 14 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.
Figure 15 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