Table Of Contents

Technical Specifications

Physical Characteristics

Catalyst 2800 Connector Pinouts

10Base-T Connector Pinouts

AUI Connector Pinouts

Serial Connector Pinouts

Technical Specifications

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This appendix describes the physical characteristics and connector pinouts of the Catalyst 2800.

Physical Characteristics

Table A-1 Technical Specifications

Reliability	50,000 hours MTBF
Operating temperature	0 to 40 degrees Celsius
Operating humidity	10% to 90%
Operating altitude	Up to 10,000 feet
Power consumption	100 watts
Input voltage	90 to 250 volts, 50 to 60 Hz
Weight	23 lbs (10.4 Kg)
Width	19 in. (48.26 cm)
Depth	12.28 in. (31.19 cm)
Height	5.25 in. (13.34 cm)

Catalyst 2800 Connector Pinouts

This section describes the following connectors used by the Catalyst 2800:

•10Base-T RJ-45

•10Base-5 AUI

•Serial RS-232

10Base-T Connector Pinouts

Ports 1 through 25 use standard RJ-45 connectors and 10Base-T pinouts with internal cross-over, as indicated by an X. These 10Base-T ports have their transmit (TD) and receive (RD) signals internally crossed, for attachment of an adapter using a straight-through cable.

Table A-2 10Base-T Pinout and Connector

AUI Connector Pinouts

The AUI connector is a 15-pin female receptacle, as shown in ; the pinouts are shown in .

Figure A-1 AUI Connector

Table A-3

1	GND	Ground
2	CI+	Positive AUI differential collision-data input
3	TX+	Positive AUI differential transmit-data input
4	GND	Ground
5	RX+	Positive AUI differential receive-data output
6	GND	Ground
7	NC
8	GND	Ground
9	CI-	Negative AUI differential collision data
10	TX-	Negative AUI differential transmit-data input
11	GND	Ground
12	RX-	Negative AUI differential receive data output
13	+12V	12 Volt supply for external MAU
14	GND	Ground
15	NC

AUI Connector Pinouts

Serial Connector Pinouts

The serial connector is a male 9-pin D sub-miniature connector, as shown in .

Figure A-2 Serial Connector

The pinouts are shown in .

Table A-4

1	DCD
2	RD
3	TD
4	DTR
5	GND
6	DSR
7	RTS
8	CTS
9	RI

Serial Connector Pinouts

The shell is connected to the chassis ground. Use a standard modem cable to connect to a modem. Use a null-modem cable to connect to a terminal.

Either piece of equipment may come with either 25-pin or 9-pin connectors.

Figure A-3

Modem Cable Schematic with 9-Pin and 25-Pin Devices

Figure A-4

Null-Modem Cable Schematic with 9- and 25-Pin Devices