Linksys WIP310 SPA500 Series and WIP310 IP Phone Administration Guide - Page 31

2 Configuring Lines and Extensions This chapter contains the following sections: • Configuring Lines, page 20 • Configuring Extensions, page 31 Configuring Lines The Cisco SPA 500 series and Wireless-G IP Phones (also called stations in this document) provide different numbers of lines depending on the phone model. See the "Overview of the Phones" section on page 2 for more information. Each line corresponds to a phone number (or extension) used for calls. Each line can support two calls. So, for example, a four-line phone can handle eight calls. One call can be active (in conversation) and seven can be on hold. Shared Line Appearances Shared Line Appearance (SLA) allows multiple phones to share an extension number and manage a call as a group. At any given time, each station sharing a call appearance can monitor the state of the call appearance. A station can select a shared call appearance to make a call only if the call appearance is not being used by another station. When a call is made to the extension number for the SLA, all sharing stations ring. Any station can answer the call. If the active phone places the call on hold, the call can be resumed from any of the sharing stations by pressing the corresponding line key from another phone (Cisco SPA 500 series, except for the Cisco SPA 502G) or the Select button when the Resume icon is displayed (WIP310). Cisco SPA 500 Series and WIP310 IP Phone Administration Guide 20