The Cisco Catalyst 1900 is a 19" rack mountable, managed (configurable) 10baseT Ethernet

Ethernet

Ethernet is a family of computer networking technologies for local area networks commercially introduced in 1980. Standardized in IEEE 802.3, Ethernet has largely replaced competing wired LAN technologies....

 switch with 100baseTX/100baseFX uplink ports. This product was popular in small office networks because of its features and price.

This switch was sold until 2002, reaching end of life (EOL) in 2007 and is no longer supported by Cisco

Cisco

Cisco may refer to:Companies:*Cisco Systems, a computer networking company* Certis CISCO, corporatised entity of the former Commercial and Industrial Security Corporation in Singapore...

.

Models

The switch was available in 12-port and 24-port models with either two 100baseTX uplink ports or one fibre and one copper 100 Mbit/s uplink ports. In addition to this, one AUI

Attachment Unit Interface

An Attachment Unit Interface is a 15 pin connection that provides a path between a node's Ethernet interface and the Medium Attachment Unit , sometimes known as a transceiver. It is the part of the IEEE Ethernet standard located between the Media Access Control , and the MAU...

 port was available on the rear panel for connecting to fiber or legacy 10Base2

10BASE2

10BASE2 is a variant of Ethernet that uses thin coaxial cable , terminated with BNC connectors...

 or 10Base5

10BASE5

10BASE5 was the original commercially available variant of Ethernet.For its physical layer it used cable similar to RG-8/U coaxial cable but with extra braided shielding. This is a stiff, diameter cable with an impedance of 50 ohms , a solid center conductor, a foam insulating filler, a shielding...

 networks.

This switch is closely related to the Cisco Catalyst 2820 series, which uses the same software, and shares many of the same features

Software

The 1900 series software was available in two editions. Whilst the enterprise edition's Command Line Interface (CLI) had a strong similarity to IOS

Cisco IOS

Cisco IOS is the software used on the vast majority of Cisco Systems routers and current Cisco network switches...

, the switches ran a unique software which was neither IOS or CatOS.

• Standard Edition - Menu based configuration. No CLI access available. Could be software upgraded to Enterprise Edition.
• Enterprise Edition - Same as standard but with extra features enabled. CLI access is possible.

The last software version released was 9.00.07 (2003).

Features

• ISL
  Cisco Inter-Switch Link
  Cisco Inter-Switch Link is a Cisco Systems proprietary protocol that maintains VLAN information in Ethernet frames as traffic flows between switches and routers, or switches and switches....
  
   trunking on fast Ethernet ports
• VLANS (4 can be configured)
• SNMP
  Simple Network Management Protocol
  Simple Network Management Protocol is an "Internet-standard protocol for managing devices on IP networks. Devices that typically support SNMP include routers, switches, servers, workstations, printers, modem racks, and more." It is used mostly in network management systems to monitor...
  
  
• Optional web based configuration
• IEEE 802.1D
  IEEE 802.1D
  802.1D is the IEEE MAC Bridges standard which includes Bridging, Spanning Tree and others. It is standardized by the IEEE 802.1 working group. It includes details specific to linking many of the other 802 projects including the widely deployed 802.3 , 802.11 and 802.16 standards.VLANs are not...
  
   Spanning-Tree Protocol support.
• Support for 1024 MAC Addresses.
• Up to 320-Mbit/s maximum forwarding bandwidth.
• Up to 450,000 packets per second aggregate packet-forwarding rate.

Hardware

• Processor: Intel 80486
• RAM
  Ram
  -Animals:*Ram, an uncastrated male sheep*Ram cichlid, a species of freshwater fish endemic to Colombia and Venezuela-Military:*Battering ram*Ramming, a military tactic in which one vehicle runs into another...
  
  : 2 MB
• FLASH
  Flash memory
  Flash memory is a non-volatile computer storage chip that can be electrically erased and reprogrammed. It was developed from EEPROM and must be erased in fairly large blocks before these can be rewritten with new data...
  
  : 1 MB
• Backplane: 1 Gbit/s
• MAC Address
  MAC address
  A Media Access Control address is a unique identifier assigned to network interfaces for communications on the physical network segment. MAC addresses are used for numerous network technologies and most IEEE 802 network technologies, including Ethernet...
  
   table size: 1024

• 10BaseT ports 12 or 24 Full Duplex
• 100BaseTX ports 1 or 2 Full Duplex
• 100BaseFX ports 1 (on 1924F) Full Duplex
• AUI port

• Internal AC power supply
• DC connector for external DC power (Cisco RPS)

History

The switch is based on a design purchased from Grand Junction Networks

Grand Junction Networks

Grand Junction Networks was a LAN switching company based in the United States. It was acquired by Cisco Systems on November 6, 1995....

Original pricing approx US$900 for a WS-1912-C to approx US$1700 for a WS-1924-EN