/etc/asterisk/sla.conf is in asterisk-config 1:1.8.10.1~dfsg-1ubuntu1.
This file is owned by root:root, with mode 0o640.
The actual contents of the file can be viewed below.
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; Configuration for Shared Line Appearances (SLA).
;
; See http://wiki.asterisk.org or doc/AST.pdf for more information.
;
; ---- General Options ----------------
[general]
;attemptcallerid=no ; Attempt CallerID handling. The default value for this
; is "no" because CallerID handling with an SLA setup is
; known to not work properly in some situations. However,
; feel free to enable it if you would like. If you do, and
; you find problems, please do not report them.
; -------------------------------------
; ---- Trunk Declarations -------------
;
;[line1] ; Provide a name for this trunk.
;type=trunk ; This line is what marks this entry as a trunk.
;device=DAHDI/3 ; Map this trunk declaration to a specific device.
; NOTE: You can not just put any type of channel here.
; DAHDI channels can be directly used. IP trunks
; require some indirect configuration which is
; described in
; https://wiki.asterisk.org/wiki/display/AST/SLA+Trunk+Configuration
;autocontext=line1 ; This supports automatic generation of the dialplan entries
; if the autocontext option is used. Each trunk should have
; a unique context name. Then, in chan_dahdi.conf, this device
; should be configured to have incoming calls go to this context.
;ringtimeout=30 ; Set how long to allow this trunk to ring on an inbound call before hanging
; it up as an unanswered call. The value is in seconds.
;barge=no ; If this option is set to "no", then no station will be
; allowed to join a call that is in progress. The default
; value is "yes".
;hold=private ; This option configure hold permissions for this trunk.
; "open" - This means that any station can put this trunk
; on hold, and any station can retrieve it from
; hold. This is the default.
; "private" - This means that once a station puts the
; trunk on hold, no other station will be
; allowed to retrieve the call from hold.
;[line2]
;type=trunk
;device=DAHDI/4
;autocontext=line2
;[line3]
;type=trunk
;device=DAHDI/3
;autocontext=line3
;[line4]
;type=trunk
;device=Local/disa@line4_outbound ; A Local channel in combination with the Disa
; application can be used to support IP trunks.
; See https://wiki.asterisk.org/wiki/display/AST/SLA+Trunk+Configuration
;autocontext=line4
; --------------------------------------
; ---- Station Declarations ------------
;[station1] ; Define a name for this station.
;type=station ; This line indicates that this entry is a station.
;device=SIP/station1 ; Each station must be mapped to a device.
;autocontext=sla_stations ; This supports automatic generation of the dialplan entries if
; the autocontext option is used. All stations can use the same
; context without conflict. The device for this station should
; have its context configured to the same one listed here.
;ringtimeout=10 ; Set a timeout for how long to allow the station to ring for an
; incoming call, in seconds.
;ringdelay=10 ; Set a time for how long to wait before beginning to ring this station
; once there is an incoming call, in seconds.
;hold=private ; This option configure hold permissions for this station. Note
; that if private hold is set in the trunk entry, that will override
; anything here. However, if a trunk has open hold access, but this
; station is set to private hold, then the private hold will be in
; effect.
; "open" - This means that once this station puts a call
; on hold, any other station is allowed to retrieve
; it. This is the default.
; "private" - This means that once this station puts a
; call on hold, no other station will be
; allowed to retrieve the call from hold.
;trunk=line1 ; Individually list all of the trunks that will appear on this station. This
; order is significant. It should be the same order as they appear on the
; phone. The order here defines the order of preference that the trunks will
; be used.
;trunk=line2
;trunk=line3,ringdelay=5 ; A ring delay for the station can also be specified for a specific trunk.
; If a ring delay is specified both for the whole station and for a specific
; trunk on a station, the setting for the specific trunk will take priority.
; This value is in seconds.
;trunk=line4,ringtimeout=5 ; A ring timeout for the station can also be specified for a specific trunk.
; If a ring timeout is specified both for the whole station and for a specific
; trunk on a station, the setting for the specific trunk will take priority.
; This value is in seconds.
;[station](!) ; When there are a lot of stations that are configured the same way,
; it is convenient to use a configuration template like this so that
; the common settings stay in one place.
;type=station
;autocontext=sla_stations
;trunk=line1
;trunk=line2
;trunk=line3
;trunk=line4
;[station2](station) ; Define a station that uses the configuration from the template "station".
;device=SIP/station2
;
;[station3](station)
;device=SIP/station3
;
;[station4](station)
;device=SIP/station4
;
;[station5](station)
;device=SIP/station5
; --------------------------------------
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