Specifications

Hardware Reference 31
C613-03059-00 REV E
RX and TX terminal locations on SC fibre GBIC ports are the reverse of RX and TX
terminal locations on fixed SC fibre ports. When looking at an SC fibre GBIC from the
front, the RX terminal is on the left and the TX terminal is on the right.
GBIC 1000BASE-T Auto-Negotiation
1000BASE-T GBICs support only 1000 Mbps full duplex connections. Although
1000BASE-T GBICs will participate in auto-negotiation processes, they will
only advertise 1000 Mbps. Half duplex, 10BASE-T, and 100BASE-TX modes are
not supported.
While 1000BASE-T GBICs will auto-negotiate at the copper Ethernet level, the
ports will behave as if in fixed 1000 Mbps full duplex mode. This is because the
SERDES connection used by GBIC ports makes the auto-negotiation invisible
to the switch, and so prevents a successful link negotiation.
When a 1000BASE-T GBIC is inserted into a GBIC slot, the port’s auto-
negotiation capability is disabled. This means that the port speed may not be
set to "auto-negotiate". If the port has been configured to auto-negotiate (by
default or by command) prior to the GBIC’s insertion, then this configuration is
overridden for as long as the GBIC remains in place.
Compact flash
AT-9800 Series switches have a compact flash slot on their rear panel. Compact
flash cards increase the flash memory available for file storage.
Compact flash files can be manipulated using the command line interface. Any
type of data, including releases, patches, GUIs and configurations can be stored
on compact flash cards. However, release, patch, and GUI files cannot be run
directly from compact flash. These files must be loaded into either NVS or
on-board flash.
Data contained on compact flash cards can be read with any compliant reader.
Do not keep sensitive data, for example keys, on compact flash cards.
Compact flash functionality is supported by software Release 2.5.1 and later.
Two compact flash cards have been approved for use with the AT-9800 Series
switch:
■ AT-CF032A-nnn 32MB CompactFlash card
■ AT-CF128A-nnn 128MB CompactFlash card
Where n is the number of cards in a package, less than 1000. A package
containing one card is 001.
For the latest list of approved compact flash cards, visit
www.alliedtelesyn.co.nz/support/at9800/.
Compact flash cards used on the switch must support a hardware access time of no more
than 100 nanoseconds. If a compact flash card does not meet the 100 nanosecond
requirement it may not work as this is the maximum bus timing allowed.