Linksys UC540W-BRI-K9 Quick Start Guide - Page 8

Line (FXO) ports (Optional) One factory-installed Voice Interface Card (VIC) Compact Flash WAN port Expansion port Connects your phone system to the PSTN. Only applies to model UC540W-FXO-K9. If the power fails, you can still make and receive emergency calls if you have a telephone line connected to the Line (FXO) port 0 and an analog phone connected to the Phone (FXS) port 3, even if the unit is not powered on. Provides connectivity to a Public Switched Telephone Network (PSTN) or for additional phone ports. Storage that contains the UC 540 software image, default configuration values, and phone software. Provides dedicated WAN (Internet) access. Connects to a DSL router, cable modem, or other WAN connectivity devices Provides a connection to a switch with ports for additional phones or data devices. (We recommend that you connect the UC 540 to a Cisco ESW 500 Series switch.) Back Panel The back panel is where you connect the UC 540 to power. There is no external On/Off power switch on the unit. 12V/10A 275674 Cisco Unified Communications 500 Series Model UC 540 Quick Start Guide 7