NETGEAR GS748T User Manual

79
GS748T Smart Switch
• Link Status. Indicates whether the Link is up or down.
• L
ink Trap. This object determines whether or not to send a trap when link status
changes. The factory default is Enable.
• Ena
ble: Specifies that the system sends a trap when the link status changes.
• Disable: S
pecifies that the system does not send a trap when the link status
changes.
• Maxim
um Frame Size. Specifies the maximum Ethernet frame size the interface
supports. The size includes the Ethernet header, CRC, and payload. Any change to
the maximum frame size is immediately applied to all interfaces.
• M
AC Address. Displays the physical address of the specified interface.
• PortList Bit Offset. Disp
lays the bit offset value which corresponds to the port when
the MIB object type PortList is used to manage in SNMP.
• i
fIndex. The ifIndex of the interface table entry associated with this port. If the
interface field is set to All, this field is blank.
6. Click Canc
el to cancel the configuration on the screen and reset the data on the screen to
the latest value of the switch.
7. If
you make any changes to the page, click Apply to apply the changes to the system.
Flow Control
IEEE 802.3x flow control works by pausing a port when the port becomes oversubscribed
and dropping all traffic for small bursts of time during the congestion condition. This can lead
to high-priority and/or network control traffic loss. When IEEE 802.3x flow control is enabled,
lower speed switches can communicate with higher speed switches by requesting that the
higher speed switch refrains from sending packets. Transmissions are temporarily halted to
prevent buffer overflows.
To display the Flow Control page, click Switchin
g  Ports, and then click the Flow Control
link.

NETGEAR GS748T Specifications

General

Basic switching RJ-45 Ethernet ports quantity	48
MAC address table	16000 entries
Packet buffer memory	1.632 MB
Maximum data transfer rate	1 Gbit/s
Latency	20 µs
I/O ports	48 RJ-45 connectors for 10BASE-T, 100BASE-TX, and 1000BASE-T (Auto Uplink on all ports) 4 SFP slots for fiber Gigabit Ethernet modules
Dimensions (WxDxH)	440 x 260 x 43 mm
Power requirements	100-240VAC 50/60 Hz
Networking features	10BASE-T, 100BASE-TX, 1000BASE-T
Connectivity technology	Wired
Full duplex	Yes
Networking standards	IEEE 802.3x
Minimum system requirements	Category 5 network cables Network card for each PC Network software (e.g., Windows)
Mean time between failures (MTBF)	69930 h
Safety	UL listed (UL 1950)/cUL, IEC950/EN60950
LED indicators	Link, Power
Power consumption (typical)	70 W
Storage temperature (T-T)	-10 - 70 °C
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	10 - 90 %

Weight and Dimensions

Weight	4000 g