I use a SNOM 870 with firmware 220.127.116.11.
To call a number from the local directory the manual states this in point 2:
Use navigation arrows to scroll through list. Alternative: Enter first letter of
name and type more letters if name shown isn't the right one.
If I want to type more then just the first letter, the first letter gets erased. I can only enter one single letter.
this is how the addressbook search works at the moment.
If you have many entries I suggest you to use an LDAP addresbook, in this case you can do a search with more letters..
This is a bug. See ticket https://helpdesk.snom.com/support/tickets/1976
what's the status of this issue ??
1 year later issue is still there ?
Snom announced EOL for the 870 1st quarter 2014. It seems likely that if this bug was not fixed by now it probably will not be fixed.