NETGEAR GS748T User Manual

102
GS748T Smart Switch
• Hello Timer. Specifies the switch Hello time, which indicates the amount of time in
seconds a port waits between configuration messages. The value is fixed at 2
seconds.
6. Click Cancel
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 configuration changes, click Apply to send the updated configuration to the
switch. Configuration changes take place immediately.
8. Click Refresh to upda
te the information on the screen with the most current data.
CST Port Status
Use the Spanning Tree CST Port Status page to display Common Spanning Tree (CST) and
Internal Spanning Tree on a specific port on the switch.
To display the Spanning Tree CST Port Status page, click Switch
ing  STP  Advanced 
CST Port Status.
The following table describes the CST Status information displayed on the screen.
Field Description
Interface Select a physical or port channel interface to configure. The port is
associa
ted with the VLAN(s) associated with the CST.
Port Role Each MST Bridge Port that is enabled is assigned a Port Role for each
sp
anning tree. The port role will be one of the following values: Root Port,
Designated Port, Alternate Port, Backup Port, Master Port, or Disabled
Port.
Designated Root Root Bridge for the CST. It is made up usi
ng the bridge priority and the base
MAC address of the bridge.
Designated Cost Displays cost of the port participating in
the STP topology. Ports with a lower
cost are less likely to be blocked if STP detects loops.

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