Gbic Module Ports - Cisco Catalyst 2950 Hardware Installation Manual

Chapter 2 Overview

GBIC Module Ports

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If the installation does not have a PBX, a homologated POTS splitter is required
to connect directly to the PSTN. For more information about homologated POTS
splitters, contact your Cisco sales representative.
If a connection to a telephone network is not required, a splitter is not needed, and
the switch can connect directly to the patch panel.
For more information about the Cisco LRE CPE devices, refer to the
Cisco LRE CPE Hardware Installation Guide.
The GBIC module slots support these modules:
• 1000BASE-SX GBIC module for fiber-optic connections that cannot exceed
1804 feet (550 meters).
• 1000BASE-LX/LH GBIC module for fiber-optic connections that cannot
exceed 32,810 feet (10 kilometers).
• 1000BASE-ZX GBIC module for fiber-optic connections that cannot exceed
328,100 feet (100 kilometers).
• 1000BASE-T GBIC module for copper connections that cannot exceed
328 feet (100 meters).
• CWDM GBIC module for single-mode fiber-optic connections that cannot
exceed 393,719 feet (120 kilometers).
• GigaStack GBIC module for creating a 1-Gbps stack configuration of up to
nine supported switches. The GigaStack GBIC supports one full-duplex link
(in a point-to-point configuration) or up to nine half-duplex links (in a stack
configuration) to other Gigabit Ethernet devices. Using the required Cisco
proprietary signaling and cabling, the GigaStack GBIC-to-GigaStack GBIC
connection cannot exceed 3 feet (1 meter).
Catalyst 2950 Desktop Switch Hardware Installation Guide
Front-Panel Description
2-13