NETGEAR GS748T User Manual

51
GS748T Smart Switch
Green Ethernet Interface Configuration
Use this page to configure Green Ethernet features on a per-port basis. The Green Ethernet
modes must be administratively enabled on the switch for the mode enabled on the port to
take effect.
To access this page, click Syst
em  Management  Green Ethernet  Green Ethernet
Interface Configuration.
To configure the Green Ethernet Interface feature:
1. Select
the check box next to the port to configure. You can select multiple ports to apply
the same setting to all selected ports. To configure all ports, select the check box in the
heading row.
2. Enable
or disable the Auto Power-Down Mode.
• Enable.
When the port link is down, the PHY automatically goes down for a short
period of time and then wake up to check link pulses. This behavior saves power
consumption when there is no link partner while still allowing the port to perform
auto-negotiation if a link partner does become present.
• Disable.
The PHY remains up even if no link partner is present.
3. Enable
or disable the Short Cable Mode.
• Enable.
The switch performs a cable test on each cable connect to its ports. If the
cable is less than 10m in length, the port is placed in low power mode (nominal
power). Short cable mode and EEE mode cannot be enabled on the same port
simultaneously.
• Disable.
Full transmit power is provided to all ports, regardless of cable length.

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