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Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide 33
Configuring Lines and Extensions
This chapter contains the following sections:
• Configuring Lines, page 33
• Configuring Extensions, page 43
Configuring Lines
The Cisco SPA 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 12 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 SPA303 and Cisco SPA500 series, except for
the Cisco SPA502G) or the Select button when the Resume icon is displayed
(WIP310).
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