Chapter 1: Overview
28
AT-SBx31GT40 Line Card
The AT-SBx31GT40 Line Card, shown in Figure 12, is a Gigabit Ethernet
switch.
Figure 12. AT-SBx31GT40 Line Card
Here are the main features of the line card:
40 10/100/1000Base-T ports
RJ point 5 connectors
100 meters (328 feet) maximum operating distance per port
Auto-Negotiation for speed
Full-duplex mode only
Automatic MDIX detection for ports operating at 10/100Base-TX,
(Automatic MDIX detection does not apply to 1000Base-T
operation.)
Port Link/Activity (L/A) LEDs
32K entry MAC address table
32 Mb buffer memory
Jumbo frame support:
10240 octets for tagged and untagged traffic
between ports on the same line card
10232 octets for untagged traffic between ports on
different line cards
10236 octets for tagged traffic between ports on
different line cards
Non-blocking full-wire speed switching on all packet sizes, with two
AT-SBx31CFC Central Fabric Controller cards
Hot swappable
Note
The ports on the line card do not support half-duplex operation.
The cable requirements for the ports on the AT-SBx31GT40 Line Card are
listed in Table 1 on page 36.