Avaya one-X 1603SW - Manual (Page 24)

Making an outgoing call on a shared line appearance
If you have any questions about how the name or extension displays to the person you are
calling when you make a call on a shared line appearance, contact your system administrator.
You can make only outside calls on shared line appearances.
1. Press the call/line appearance button associated with the shared line appearance.
2. Dial the telephone number.
Shared line appearances
24 Avaya 1603/1603SW/1603-I/1603SW-I IP Deskphone User Guide February 2010