I/O ports and slots

48 RJ-45 autosensing 10/100 ports (IEEE 802.3 Type 10BASE-T, IEEE 802.3u Type 100BASE-TX); Duplex: half or full

2 autosensing 10/100/1000 ports (IEEE 802.3 Type 10BASE-T, IEEE 802.3u Type 100BASE-TX, IEEE 802.3ab Type 1000BASE-T); Duplex: 10BASE-T/100BASE-TX: half or full; 1000BASE-T: full only

2 fixed Gigabit Ethernet SFP ports

Additional ports and slots

1 dual-personality (RJ-45 or USB micro-B) serial console port

Physical characteristics

Dimensions

17.40(w) x 9.70(d) x 1.75(h) in (44.2 x 24.64 x 4.45 cm) (1U height)

Weight

6.3 lb (2.86 kg)

Memory and processor

Processor

ARM9E @ 800 MHz, 128 MB flash; Packet buffer size: 3 MB dynamically allocated, 256 MB DDR3 DIMM

Mounting and enclosure

Mounts in an EIA-standard 19-inch telco rack or equipment cabinet (rack-mounting kit available); Horizontal surface mounting; Wall mounting

Performance

IPv6 Ready Certified

100 Mb Latency

< 6.6 µs (LIFO 64-byte packets)

1000 Mb Latency

< 2.2 µs (LIFO 64-byte packets)

Throughput

up to 13 Mpps (64-byte packets)

Switching capacity

17.6 Gbps

MAC address table size

16000 entries

Environment

Operating temperature

32°F to 113°F (0°C to 45°C)

Operating relative humidity

15% to 95% @ 104°F (40°C), noncondensing

Non-operating/
Storage temperature

-40°F to 158°F (-40°C to 70°C)

Non-operating/Storage relative humidity

15% to 90% @ 149°F (65°C), noncondensing

Altitude

up to 10,000 ft (3 km)

Acoustic

Power: 0 dB, Pressure: 0 dB

Electrical characteristics

Frequency

50/60 Hz

Maximum heat dissipation

102 BTU/hr (107.61 kJ/hr)

Voltage

100 - 127 / 200 - 240 VAC, rated

Current

0.7/0.4 A

Maximum power rating

29.9 W

Idle power

17.1 W

Notes:

­ Idle power is the actual power consumption of the device with no ports connected.

­ Maximum power rating and maximum heat dissipation are the worst-case theoretical maximum numbers provided for planning the infrastructure with fully loaded PoE (if equipped), 100% traffic, all ports plugged in, and all modules populated.

Safety

UL 60950-1; CAN/CSA 22.2 No. 60950-1; EN 60825; IEC 60950-1; EN 60950-1

Emissions

FCC Class A; EN 55022/CISPR-22 Class A; VCCI Class A

Immunity

Generic

EN 55024, CISPR 24

EN

EN 55024, CISPR 24

ESD

IEC 61000-4-2

Radiated

IEC 61000-4-3

EFT/Burst

IEC 61000-4-4

Immunity

Surge

IEC 61000-4-5

Conducted

IEC 61000-4-6

Power frequency magnetic field

IEC 61000-4-8

Voltage dips and interruptions

IEC 61000-4-11

Harmonics

EN 61000-3-2, IEC 61000-3-2

Flicker

EN 61000-3-3, IEC 61000-3-3

Management

IMC - Intelligent Management Center; command-line interface; Web browser; configuration menu; Out-of-band management (serial RS-232C or MicroUSB); IEEE 802.3 Ethernet MIB; Repeater MIB; Ethernet Interface MIB

Notes:

IEEE 802.3az applies to Gigabit models only; IEEE 802.3at and IEEE 802.3af apply to PoE+ models only. When using SFPs with this product, SFPs with revision "B" or later (product number ends with the letter "B" or later, e.g., J4858B, J4859C) are required.