Specifications

26 AT-8900, AT-9900, AT-9900s Series Switches
Software Release 3.0.2
C613-03092-00 REV C
SFP Ports
SFP transceivers are compact, hot-swappable, and high speed. Certain fibre
and copper SFP transceivers are supported so that you can interchange port
types to meet changing network requirements. AT-8900 and AT-9900 switches
have 1000BASE-X Small Form Factor Pluggable (SFP) uplink sockets
conveniently located on the front panels.
■ AT-8948, AT-9924T/4SP, and AT-9924T models have 4 SFP sockets
■ AT-9924SP models have 24 SFP sockets
Approved SFP
transceivers
You can purchase SFP transceivers when you purchase a switch or order them
separately as needed. For details about tested and approved SFPs, see “SFP
ports” on page 39. Also see individual datasheets on the documentation CD for
details.
For the latest list of approved SFP transceivers, contact your authorised
distributor or reseller.
Types of SFP
transceivers
Speed and duplex settings differ depending on the type of SFP transceiver
installed in it.
■ For an SFP port with an approved fibre SFP transceiver, the speed and
duplex settings are fixed at 1000Mbps full duplex autonegotiation.
■ For an SFP port with an approved copper SFP transceiver, the available
speed and duplex settings are:
• 10Mbps and 100Mbps half duplex
• 10Mbps and 100Mbps half duplex autonegotiation
• 10Mbps and 100Mbps full duplex
• 10Mbps and 100Mbps full duplex autonegotiation
• 1000Mbps full duplex autonegotiation
An error message is displayed when an SFP port cannot operate at the
specified speed or duplex mode.
When using SFP ports 1 to 4 on AT-9924T/4SP and AT-9924T switches, the
corresponding RJ-45 ports (1 to 4) are disabled. However, when the SFP
transceiver is removed, the RJ-45 port becomes operational again.