trixbox1*CLI> dialplan show users
[ Context 'users' created by 'pbx_config' ]
Alt. Switch => 'Realtime/@' [pbx_config]

-= 0 extensions (0 priorities) in 1 context. =-
== Using SIP RTP CoS mark 5
== Using SIP VRTP CoS mark 6
-- Executing Dial("SIP/pelu-09071fe8", "SIP/lame")
== Using SIP RTP CoS mark 5
== Using SIP VRTP CoS mark 6
[Sep 22 19:31:31] WARNING[20471]: app_dial.c:1518 dial_exec_full: Unable to create channel of type 'SIP' (cause 20 - Unknown)
== Everyone is busy/congested at this time (1:0/0/1)
-- Auto fallthrough, channel 'SIP/pelu-09071fe8' status is 'CHANUNAVAIL'
-- Registered SIP 'pelu' at 195.209.66.98 port 5062
> Saved useragent "kphone/4.2" for peer pelu

[general]
context=default ; Default context for incoming calls
videosupport=yes
allow=all
;bindaddr=0.0.0.0
tlscafile=/etc/ssl/CA.cert
;allowguest=no ; Allow or reject guest calls (default is yes, this can also be set to 'osp'
; if asterisk was compiled with OSP support.
realm=mydomain.tld ; Realm for digest authentication
; defaults to "asterisk"
; Realms MUST be globally unique according to RFC 3261
; Set this to your host name or domain name
bindport=5060 ; UDP Port to bind to (SIP standard port is 5060)
; bindport is the local UDP port that Asterisk will listen on
bindaddr=0.0.0.0 ; IP address to bind to (0.0.0.0 binds to all)
srvlookup=yes ; Enable DNS SRV lookups on outbound calls
; Note: Asterisk only uses the first host
; in SRV records
; Disabling DNS SRV lookups disables the
; ability to place SIP calls based on domain
; names to some other SIP users on the Internet

dn: cn=666-1,ou=extensions,dc=xxx,dc=xx,dc=xx
objectClass: top
objectClass: AsteriskExtension
AstContext: demo
AstPriority: 1
AstApplication: Playback
AstExtension: 666
cn: 666-1
AstApplicationData: demo-echotest

dn: cn=666-2,ou=extensions,dc=xxx,dc=xx,dc=xx
cn: 666-2
objectClass: top
objectClass: AsteriskExtension
AstContext: demo
AstPriority: 2
AstApplication: Echo
AstExtension: 666

dn: cn=666-3,ou=extensions,dc=xxx,dc=xx,dc=xx
cn: 666-3
objectClass: top
objectClass: AsteriskExtension
AstContext: demo
AstPriority: 3
AstApplication: Playback
AstApplicationData: demo-echodone
AstExtension: 666

dn: cn=2002,ou=extensions,dc=xxx,dc=xx,dc=xx
cn: 2002
objectClass: top
objectClass: AsteriskExtension
AstContext: users
AstExtension: 2002
AstPriority: 1
AstApplication: Dial
AstApplicationData: SIP/lame

;
; Extensions Table
;
[extensions]
context = AstContext
exten = AstExtension
priority = AstPriority
app = AstApplication
appdata = AstApplicationData
additionalFilter=(objectClass=AsteriskExtension)

Registered SIP 'pelu' at 195.209.66.98 port 5062