Catalyst 4908G-L3 Hardware Installation Guide
Switch Router Specifications
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Switch Router Specifications

Switch Router Specifications

This appendix describes the technical specifications for the Catalyst 4908G-L3 switch router, the cabling specifications, and the pinouts for the ports.

Specifications

Table A-1 lists the specifications for the Catalyst 4908G-L3 switch router.


Table A-1: Catalyst 4908G-L3 Switch Router Specifications
Specification Description

Environmental

Temperature, ambient operating

32 to 104°F (0 to 40°C)

Temperature, ambient nonoperating and storage

-40 to 167°F (-40 to 75°C)

Humidity (RH), ambient (noncondensing) operating

10 to 90 percent

Humidity (RH), ambient (noncondensing) nonoperating and storage

5 to 95 percent

Altitude, operating and nonoperating

-60 to 2,000 m
Switching Components

Backplane

22 Gbps full duplex

Microprocessor

150-MHz R5000 RISC

Memory

64 MB of SDRAM, 16 MB of Flash ROM (onboard), 128 KB of NVRAM,12 MB of synchronous SRAM, 256 bytes serial EEROM
Physical Characteristics

Dimensions (H x W x D)

2.625 x 17.5 x 18 in. (6.6 x 44 x 45.7 cm)
1.5 RU1

Weight

14 lb (6.4 kg)
AC Power

Power supply output

175W

System power dissipation

240W

AC

3A maximum @ 100 VAC
1A maximum @ 240 VAC
820 BTU/hr2

AC frequency

50 to 60 Hz

KVA rating3

0.240 KVA

Airflow

Front, right, and left side in, rear out
DC Power

DC-input voltage

-48V to -60 V DC, 4A

Input wiring

AWG 14 (recommended), AWG 12 (maximum)
Standards Compliance

Compliance

CE Marking

Safety

UL 19504, CSA-C22.2 No. 9505, EN 609506, IEC 9507, IEC 60825, EN 60825, 21 CFR 10408

EMC9

FCC Class A (CFR 47, part 15)10, ICES-003 Class A11, EN55022 Class A, EN55024 Class A, CISPR2212 Class A, AS/NZS 354813 Class A, and VCCI14 Class A with UTP15 cables

EN55022 Class B, CISPR22 Class B, AS/NZS 3548 Class B, and VCCI Class B with FTP cables
1RU = rack units
2BTU/hr = British Thermal Units per hour
3KVA = kilovolts ampere
4UL = Underwriters Laboratory
5CSA = Canadian Standards Association
6EN = European Norm
7IEC = International Electrotechnical Commission
8CFR = Code of Federal Regulations
9EMC = electromagnetic compatibility
10FCC = Federal Communications Commission
11ICES = International Commerce Exchange Systems
12CISPR = Comite Internations Special Des Perturbations Radioelectrigues
13AS/NZS = Australia/New Zealand Standards
14VCCI = Voluntary Control Council for Information Technology Equipment
15UTP = unshielded twisted-pair


Console Port Pinouts

The console port is an RJ-45 receptacle. Data terminal ready (DTR) and data set ready (DSR) handshake signals are supported. The Request To Send (RTS) signal tracks the state of the Clear To Send (CTS) signal. Table A-2 lists pinouts for the console port.


Table A-2: Console Port Pinouts
Pin Signal Direction Description

11

RTS/CTS

Output

Request to send / Clear to send

2

DTR

Output

Data terminal ready

3

TxD

Output

Transmit data

4

SGND

—

Signal ground

5

SGND

—

Signal ground

6

RxD

Input

Receive data

7

DSR

Input

Data set ready

81

RTS/CTS

Input

Request to send / Clear to send
1Pin 1 and pin 8 are connected.


Auxiliary Port Pinouts

The auxiliary port is an RJ-45 receptacle that supports remote console interfaces using a modem. Table A-3 lists pinouts for the auxiliary port.


Table A-3: Auxiliary Port Pinouts
Pin Signal Direction Description

1

RTS

Output

Request to send

2

DTR

Output

Data terminal ready

3

TxD

Output

Transmit data

4

SGND

—

Signal ground

5

SGND

—

Signal ground

6

RxD

Input

Receive data

7

DSR

Input

Data set ready

8

CTS

Input

Clear to send


Gigabit Ethernet Ports

Gigabit Interface Converters (GBICs) are installed in the Gigabit Ethernet ports. Table A-4 provides cabling specifications for the GBICs. All GBIC ports have SC-type connectors, and the minimum cable distance for all GBICs listed is 6.5 feet (2 meters).


Table A-4: Gigabit Ethernet Port Cabling Specifications
GBIC Wavelength
(nm1) 		Fiber Type Core Size (micron) Modal Bandwidth (MHz.km) Cable Distance

SX2'3

850

MMF4

62.5

62.5

50.0

50.0

160

200

400

500

722 ft (220 m)

902 ft (275 m)

1640 ft (500 m)

1804 ft (550 m)

LX/LH5

1300

MMF6

SMF7 (LX/LH)

62.5

50.0

50.0

9/10

500

400

500

—

1804 ft (550 m)

1804 ft (550 m)

1804 ft (550 m)

32,810 ft (10 km)

ZX8

1550

SMF

Not conditional

—

45 to 60 mi (70 to 100 km)
1nm = nanometers
2SX = short wavelength
3MMF only
4MMF = multimode fiber
5LX/LH = long wavelength/long haul
6Patch cord required (see the "Patch Cord" section for details)
7SMF = single-mode fiber
8ZX = extended distance