Catalyst 4948 Install Guide
Specifications
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Table of Contents

Specifications

Console Port

10/100BASE-T Management Port

Catalyst4948 Switch Specifications

Specifications

Revised: January 4, 2012

This appendix provides cable and technical specifications for the Catalyst 4948 switch.

Console Port

The console port is an RJ-45 receptacle. The Request to Send (RTS) signal tracks the state of the Clear to Send (CTS) input. Table A-1 lists the console port pinouts.


Note A console cable is not provided in the accessory kit. It can be ordered as an option.


 

Table A-1 Console Port Pinouts

Pin
Signal
Direction
Description

1

RTS

output

request to send

2

DTR

output

data terminal ready

3

TXD

output

transmit data

4

GND

 

 

5

GND

 

 

6

RXD

input

receive data

7

DSR

input

data set ready

8

CTS

input

clear to send

10/100BASE-T Management Port

The 10/100BASE-T port is an RJ-45 receptacle with a Link Status LED. Table A-2 lists the 10/100BASE-T port pinouts.

 

Table A-2 10/100BASE-T Port Pinouts

Pin
Signal
Direction
Description

1

RXDP

input

receive data

2

RXDN

input

receive data

3

TXDP

output

transmit data

4

unused

 

 

5

unused

 

 

6

TXDN

output

transmit data

7

unused

 

 

8

unused

 

 

Catalyst 4948 Switch Specifications

Catalyst 4948 switch specifications are provided in Table A-3 .

 

Table A-3 Catalyst 4948 Switch Specifications

Item
Specification
Environmental

Temperature
ambient operating

32°F (0°C) to 104°F (40°C)

Temperature
ambient nonoperating and storage

–40 to 167°F (–40 to 75°C)

Humidity (RH), ambient (noncondensing) operating

10% to 90%

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

5% to 95%

Altitude
operating and nonoperating

–60 to 2000 m

Switch heat dissipation

1023 BTU/hour

Switching Components

Memory

256-MB SDRAM, 64-MB Flash (onboard and fixed), 512-KB NVRAM, 256 bytes serial EEROM

Physical Characteristics

Dimensions (H x W x D)

1.75 x 17.5 x 16 in. (4.5 x 44.5 x 40.6 cm)

Weight

17 lb (7.8 kg) for a system with two power supplies

Airflow

Sides in, rear out

AC Power

Power supply output

300 W

System power dissipation

150 W

AC-input

4 A maximum @ 100 VAC
2 A maximum @ 240 VAC

AC frequency

50 to 60 Hz

Output current

25A max

Output voltage

12V

Input KVA rating

0.375 KVA

DC Power

Power supply output

300 W

System power dissipation

150 W

DC-input

8A @ –48 to –60 VDC

Output current

25A max

Output voltage

12V

Input KVA rating

0.4 KVA