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.
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
