NETGEAR GS748T User Manual

232
GS748T Smart Switch
Packets Received 65-127
Octets
The total number of packets (including bad packets) received that were
between 65 and 127 octets in length inclusive (excluding framing bits but
including FCS octets).
Packets Received 128-255
Octets
The total number of packets (including bad packets) received that were
between 128 and 255 octets in length inclusive (excluding framing bits but
including FCS octets).
Packets Received 256-511
Octets
The total number of packets (including bad packets) received that were
between 256 and 511 octets in length inclusive (excluding framing bits but
including FCS octets).
Packets Received
512-1023 Octets
The total number of packets (including bad packets) received that were
between 512 and 1023 octets in length inclusive (excluding framing bits but
including FCS octets).
Packets Received
1024-1518 Octets
The total number of packets (including bad packets) received that were
between 1024 and 1518 octets in length inclusive (excluding framing bits but
including FCS octets).
Packets Received > 1522
Octets
The total number of packets received that were in excess of 1522 octets
(excluding framing bits, but including FCS octets) and were otherwise well
formed.
Total Packets Received
Without Errors
The total number of packets received that were without errors.
Unicast Packets Received The number of subnetwork-unicast packets delivered to a higher-layer
protocol.
Multicast Packets Received The total number of good packets received that were directed to a multicast
address. This number does not include packets directed to the broadcast
address.
Broadcast Packets
Received
The total number of good packets received that were directed to the broadcast
address. This does not include multicast packets.
Total Packets Received with
MAC Errors
The total number of inbound packets that contained errors preventing them
from being deliverable to a higher-layer protocol.
Jabbers Received The total number of packets received that were longer than 1518 octets
(excluding framing bits, but including FCS octets), and had either a bad Frame
Check Sequence (FCS) with an integral number of octets (FCS Error) or a bad
FCS with a non-integral number of octets (Alignment Error). This definition of
jabber is different than the definition in IEEE
802.3 section 8.2.1.5 (10BASE5)
and section 10.3.1.4 (10BASE2). These documents define jabber as the
condition where any packet exceeds 20 ms. The allowed range to detect
jabber is between 20 ms and 150 ms.
Fragments Received The total number of packets received that were less than 64 octets in length
with ERROR CRC (excluding framing bits but including FCS octets).
Undersize Received The total number of packets received that were less than 64 octets in length
with GOOD CRC (excluding framing bits but including FCS octets).
Field Description

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