Thanks for the hint,

I set this to the "internal" profile, however this did not work. When
Phone 1 is set to "on hold" I receive a number of SLA2 error messages
which belong to a database connection.
We have set up an odbc database connction which works for the internal
database in all other cases. Do we need special DB settings for this?
I tried to execute the below embedded sql statements manually with the
same sql login and they all work without an error.

What can be the source of these errors?

============================================
2010-11-12 15:28:54.135087 [ERR] sofia_presence.c:721 STATE SQL update
sip_dialogs set
call_info='appearance-index=1',call_info_state='alerting' where
hostname='mydomain.org' and uuid='2d21424a-ee69-11df-94ab-3f32128609a9'
2010-11-12 15:28:54.135087 [ERR] sofia_presence.c:728 PROCESS PRESENCE EVENT
2010-11-12 15:28:54.135087 [ERR] sofia_presence.c:1925 PRES SQL select

sip_from_user,sip_from_host,call_info,call_info_state,uuid from
sip_dialogs where hostname='mydomain.org' and sip_from_user='4702' and
sip_from_host='mydomain.org'

2010-11-12 15:28:54.135087 [ERR] sofia_presence.c:1839 SLA2: 0
[sip_from_user]=[4702]