2.the speed dial buttons can be customized, please see /etc/asterisk/sccp.conf, however due to some interesting bugs in the sccp channel for asterisk, using these buttons frequently will cause the entire sccp channel to die, rendering the phones dead until asterisk is restarted.
thanks for info. In the mean time, it began to work - it seems the reboot did the trick. Here's simple explanation - I've added this to [devices] section of /etc/asterisk/sccp.conf :
;speeddial = 111,Example Speed dial ; speeddial number and name
and it appeared on phone. But beware, Thom claims that frequent use of speedial buttons can cause instability... I'll leave them out for now...