Catalyst 2948G-L3 Hardware Installation Guide
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Switch Router Specifications

Switch Router Specifications

This appendix describes the technical specifications for the Catalyst 2948G-L3 switch router, cabling specifications, and pinouts for the ports.

Specifications

Table A-1 lists the technical specifications for the Catalyst 2948G-L3 switch router.


Table A-1: Catalyst 2948G-L3 Switch Router Specifications
Specification Description
Environmental

Temperature, ambient operating

32 to 113°F (0 to 45°C)

Temperature, ambient nonoperating and storage

-4 to 149°F (-20 to 65°C)

Humidity (RH), ambient (noncondensing) operating

10 to 85 percent

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

5 to 95 percent

Altitude, operating and nonoperating

Up to 10,000 ft. (3000 m)
Switching Components

Backplane

20 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)

2.69 x 17.1 x 18 in. (6.6 x 43.4 x 45.7 cm)

Weight

18 lb. (8.08 kg)
AC Power

Power supply output

175W

System power dissipation

240W

AC-input

3A maximum @ 100 VAC
1A maximum @ 240 VAC

AC frequency

50 to 60 Hz

KVA rating1

0.240 KVA

Airflow

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

DC-input voltage

-48V DC to -60 V DC, 4A

Ground wiring

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

Compliance

CE Marking

Safety

UL 19502, CSA-C22.2 No. 9503, EN 609504, IEC 9505, IEC 60825, EN 60825, 21 CFR 10406

EMC7

FCC Class A (CFR 47, part 15)8, ICES-003 Class A9, EN55022 Class A, EN55024 Class A, CISPR2210 Class A, AS/NZS 354811 Class A, and VCCI12 Class A with UTP13 cables


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