Cisco Catalyst 2950 Hardware Installation Guide

Chapter 3 Installation
Installing and Removing SFP Modules
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Catalyst 2950 Desktop Switch Hardware Installation Guide
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Installing and Removing SFP Modules
These sections describe how to install and remove small-form-factor pluggable
(SFP) modules. SFP modules are inserted into SFP module slots on the front of
the Catalyst 2950 LRE switches. These field-replaceable modules provide the
uplink optical interfaces, laser send (TX) and laser receive (RX).
You can use any combination of SFP modules. Refer to the Catalyst 2950 LRE
release notes for the list of SFP modules that the Catalyst 2950 LRE switch
supports. Each port must match the wave-length specifications on the other end of
the cable, and the cable must not exceed the stipulated cable length for reliable
communications. Refer to Table 2-2 for cable stipulations for SFP connections.
Use only Cisco SFP modules on the Catalyst 2950 LRE switch. Each SFP module
has an internal serial EEPROM that is encoded with security information. This
encoding provides a way for Cisco to identify and validate that the SFP module
meets the requirements for the switch.
For detailed instructions on installing, removing, and cabling the SFP module,
refer to your SFP module documentation.
Installing SFP Modules into SFP Module Slots
SFP modules use different types of latches for their installation and extraction.
Determine which type of latch your SFP module uses before following the
installation procedure:
• Figure 3-24 shows an SFP module with a Mylar tab latch.
• Figure 3-25 shows an SFP module with an actuator button latch.
• Figure 3-26 shows an SFP module that has a bale-clasp latch.
Caution We strongly recommend that you do not install or remove the SFP module with
fiber-optic cables attached to it because of the potential damage to the cables, the
cable connector, or the optical interfaces in the SFP module. Disconnect all cables
before removing or installing an SFP module.
Removing and installing an SFP module can shorten its useful life. Do not remove
and insert SFP modules more often than is absolutely necessary.

Cisco Catalyst 2950 Specifications

General

Forwarding Bandwidth	8.8 Gbps
Switching Capacity	13.6 Gbps
Forwarding Rate	6.6 Mpps
Weight	3.6 kg
RAM	16 MB
Flash Memory	8 MB
Operating Humidity	10% to 85% non-condensing
Uplink Ports	2 x 10/100/1000Base-T
Dimensions	4.4 cm x 44.5 cm x 24.2 cm
Remote Management Protocol	SNMP, Telnet, HTTP
Features	Quality of Service (QoS), VLAN support
Compliant Standards	IEEE 802.3, IEEE 802.3u, IEEE 802.1D, IEEE 802.1Q, IEEE 802.1p
Status Indicators	system
Operating Temperature	0 to 45°C
Ports	24 x 10/100 Ethernet ports
MAC Address Table Size	8, 192 entries
Power Supply	Internal 100-240V AC, 50-60Hz