Specifications

Revised: January 4, 2012

This appendix provides cable and technical specifications for the Catalyst 4900 series switches.

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


Management Port

The 10/100BASE-T (Catalyst 4948) or 10/100/1000BASE-T (Catalyst 4948-10GE) management port use 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

—

—


Table A-3 lists the 10/100/1000BASE-T port pinouts.

Table A-3 10/100/1000 BASE-T Port Pinouts

Pin
Signal
Description

1

TXRX0P

Bidirectional data pair 0

2

TXRX0N

Bidirectional data pair 0

3

TXRX1P

Bidirectional data pair 1

4

TXRX2P

Bidirectional data pair 2

5

TXRX2N

Bidirectional data pair 2

6

TXRX1N

Bidirectional data pair 1

7

TXRX3P

Bidirectional data pair 3

8

TXRX3N

Bidirectional data pair 3


Catalyst 4900 Series Switch Specifications

Table A-4 shows Catalyst 4900 series switch specifications.

Table A-4 Catalyst 4900 Series Switch Specifications 

Item
Specification
Environmental

Temperature,
ambient operating

ambient nonoperating and storage


32°F (0°C) to 104°F (40°C)

-40 to 167°F (-40 to 75°C)

Humidity (RH),
ambient (noncondensing) operating

nonoperating and storage


10% to 90%

5% to 95%

Altitude
operating and nonoperating

-60 to 2000 m

Switch heat dissipation

1023 BTU/hour (Catalyst 4928-10GE)

600 BTU/hour (Catalyst 4948)

723 BTU/hour (Catalyst 4948-10GE)

System power dissipation

150 W (Catalyst 4928-10GE)

200 W (Catalyst 4948)

211 W (Catalyst 4948-10GE)

Switching Components

Memory

256-MB SDRAM, 64-MB Flash, 256 bytes serial EEROM (all fixed and not upgradeable)

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

17.5 lb (7.9 kg) for a system with two power supplies, 2.0 lb (0.9 kg) per power supply

Airflow

Sides in, rear out

AC Power

Minimum input

85 VAC

Power supply output

300 W

AC-input

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

AC frequency

50 to 60 Hz

Output current

25 A max

Peak current

4 A max @ 100 VAC

2 A max @ 240 VAC

Inrush value

20 A for one cycle of AC

Output voltage

12 V

Input KVA rating

0.375 KVA

DC Power

Minimum input

-40.5 VDC

Power supply output

300 W

DC-input

8 A @ -48 to -60 VDC

Output current

25 A max

Peak current

8 A @ -48 to -60 VDC

Inrush value

Cold turn on (PSU off for > 1 hour) - 45 A

Hot turn on (PSU on for > 1 hour) - 90 A

Output voltage

12 V

Input KVA rating

0.4 KVA