This document describes the SPA5xxG IP Phone softkeys, their dependencies, how to edit, and an example of defining a programmable softkey (PSK).
Hello Patrick (or other support),
Is there any more documents that dive into the Softkey configuration for the SPA5xxG phones?
I'd like to know more what other functions are available besides speed dial.
Did you tried to read the Administrators guide ?
Especially Configuring Unused Line Keys to Access Services, Configuring Call Pickup and Busy Lamp Field, Configuring Speed Dial and Line Key (Extended Function) paragraphs ...