NETGEAR GS748T User Manual

233
GS748T Smart Switch
Alignment Errors The total number of packets received that had a length (excluding framing bits,
but including FCS octets) of between 64 and 1518 octets, inclusive, but had a
bad Frame Check Sequence (FCS) with a non-integral number of octets.
Rx FCS Errors The total number of packets received that had a length (excluding framing bits,
but including FCS octets) of between 64 and 1518 octets, inclusive, but had a
bad Frame Check Sequence (FCS) with an integral number of octets
Overruns The total number of frames discarded as this port was overloaded with
incoming packets, and could not keep up with the inflow.
Total Received Packets Not
Forwarded
A count of valid frames received which were discarded (i.e., filtered) by the
forwarding process.
Local Traffic Frames The total number of frames dropped in the forwarding process because the
destination address was located off of this port.
802.3x Pause Frames
Received
A count of MAC Control frames received on this interface with an opcode
indicating the PAUSE operation. This counter does not increment when the
interface is operating in half-duplex mode.
Unacceptable Frame Type The number of frames discarded from this port due to being an unacceptable
frame type.
Multicast Tree Viable
Discards
The number of frames discarded when a lookup in the multicast tree for a
VLAN occurs while that tree is being modified.
Reserved Address Discards The number of frames discarded that are destined to an IEEE 802.1 reserved
address and are not supported by the system.
Broadcast Storm Recovery The number of frames discarded that are destined for FF:FF:FF:FF:FF:FF
when Broadcast Storm Recovery is enabled.
CFI Discards The number of frames discarded that have CFI bit set and the addresses in
RIF are in non-canonical format.
Upstream Threshold The number of frames discarded due to lack of cell descriptors available for
that packet's priority level.
Total Packets Transmitted
(Octets)
The total number of octets of data (including those in bad packets) transmitted
on the network (excluding framing bits but including FCS octets). This object
can be used as a reasonable estimate of ethernet utilization. If greater
precision is desired, the etherStatsPkts and etherStatsOctets objects should
be sampled before and after a common interval.
Packets Transmitted 64
Octets
The total number of packets (including bad packets) transmitted that were 64
octets in length (excluding framing bits but including FCS octets).
Packets Transmitted
65-127 Octets
The total number of packets (including bad packets) transmitted that were
between 65 and 127 octets in length inclusive (excluding framing bits but
including FCS octets).
Packets Transmitted
128-255 Octets
The total number of packets (including bad packets) transmitted that were
between 128 and 255 octets in length inclusive (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