/usr/share/asterisk/conf/cdr_syslog.conf.sample is in asterisk 1:11.7.0~dfsg-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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; Asterisk Call Detail Records (CDR) - Syslog Backend
;
; The cdr_syslog module writes CDRs using the facilities provided by syslog.
;
; Not only must you configure cdr_syslog from this file (cdr_syslog.conf) but
; you will also need to make changes to your /etc/syslog.conf before CDRs will
; be written to syslog.
;
; As an example, you can add the following to /etc/syslog.conf:
;
; local4.info /var/log/asterisk-cdr.log
;
; And then instruct syslogd to re-read the configuration file by sending it a
; HUP signal. On Linux this can be done like this:
;
; kill -HUP `cat /var/run/syslogd.pid`
;
; Finally, you will need to uncomment the [cdr-simple] section below, and restart
; Asterisk. When calls are placed, you should start seeing records appear in
; /var/log/asterisk-cdr.log.
[general]
; Facility
;
; The 'facility' keyword specifies the syslog facility to use when writing out
; CDRs.
;
; Accepted values: One of the following:
; user, local0, local1, local2, local3, local4, local5, local6
; and local7.
;
; Note: Depending on your platform, the following may also be
; available:
; auth, authpriv, cron, daemon, ftp, kern, lpr, mail,
; news, syslog, and uucp.
;
; Default value: local4
;facility=local0
; Priority
;
; Use the 'priority' keyword to select which of the syslog priority levels to
; use when logging CDRs.
;
; Accepted values: One of the following:
; alert, crit, debug, emerg, err, info, notice, warning
; Default value: info
;priority=warn
; Note: The settings for 'facility' and 'priority' in the [general] section
; define the default values for all of the logging locations created
; below in separate sections.
;[cdr-master]
;facility = local5
;priority = debug
; Template
;
; The 'template' value allows you to specify a custom format for messages
; written to syslog. This is similar to how cdr_custom is configured.
;
; Allowed values: A diaplan style string.
; Default value: None, this is required field.
;
; Note: Because of the way substitution is done, the only meaningful values
; available when the record is logged are those available via the CDR()
; dialplan function. All other channel variables will be unavailable.
;template = "${CDR(clid)}","${CDR(src)}","${CDR(dst)}","${CDR(dcontext)}","${CDR(channel)}","${CDR(dstchannel)}","${CDR(lastapp)}","${CDR(lastdata)}","${CDR(start)}","${CDR(answer)}","${CDR(end)}","${CDR(duration)}","${CDR(billsec)}","${CDR(disposition)}","${CDR(amaflags)}","${CDR(accountcode)}","${CDR(uniqueid)}","${CDR(userfield)}"
; High Resolution Time for billsec and duration fields
;template = "${CDR(clid)}","${CDR(src)}","${CDR(dst)}","${CDR(dcontext)}","${CDR(channel)}","${CDR(dstchannel)}","${CDR(lastapp)}","${CDR(lastdata)}","${CDR(start)}","${CDR(answer)}","${CDR(end)}","${CDR(duration,f)}","${CDR(billsec,f)}","${CDR(disposition)}","${CDR(amaflags)}","${CDR(accountcode)}","${CDR(uniqueid)}","${CDR(userfield)}"
;[cdr-simple]
; Since we don't specify a facility or priority for this logging location, the
; records will use the defaults specified in the [general] section.
;template = "We received a call from ${CDR(src)}"
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