I have upgraded PBX to Asterisk 1.6.2.7 and now CDR files are not created. It looks that such logging is disabled:

Connected to Asterisk 1.6.2.7 currently running on pbx2 (pid = 5824)
Verbosity is at least 3
pbx2*CLI> cdr show status
pbx2*CLI>
Call Detail Record (CDR) settings
----------------------------------
    Logging:                    Disabled
    Mode:                       Simple

Asterisk shows that CDR modules are loaded:

pbx2*CLI> module show like cd
Module                         Description                              Use Count
cdr_manager.so                 Asterisk Manager Interface CDR Backend   0
cdr_csv.so                     Comma Separated Values CDR Backend       0
app_cdr.so                     Tell Asterisk to not maintain a CDR for  0
app_forkcdr.so                 Fork The CDR into 2 separate entities    0
func_cdr.so                    Call Detail Record (CDR) dialplan functi 0
cdr_custom.so                  Customizable Comma Separated Values CDR  0
6 modules loaded

How to enable creating CDR csv files?