Catalyst 4948 Install Guide

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