host=***provider ip address OR Domain***
username=***userid***
secret=***password***
type=friend
qualify=yes
port=5060
disallow=all
allow=alaw&ulaw
fromuser=2191001099
insecure=invite,port
nat=force_report,comedia
dtmfmode=auto
#rfc2833
#sipinfo
#inband
context=from-trunk

---------------------------------Class Sample
host=***provider ip address***
username=***userid***
secret=***password***
type=peer
qualify=yes
disallow=all
allow=alaw&ulaw
insecure=invite,port
nat=force_report,comedia
dtmfmode=auto
fromuser=2191001099
context=from-trunk

----------------------------
; Configuration options available
; --------------------
; context
; callingpres
; permit
; deny
; secret
; md5secret
; remotesecret
; transport
; dtmfmode
; directmedia
; nat
; callgroup
; pickupgroup
; language
; allow
; disallow
; autoframing
; insecure
; trustrpid
; trust_id_outbound
; progressinband
; promiscredir
; useclientcode
; accountcode
; setvar
; callerid
; amaflags
; callcounter
; busylevel
; allowoverlap
; allowsubscribe
; allowtransfer
; ignoresdpversion
; subscribecontext
; template
; videosupport
; maxcallbitrate
; rfc2833compensate
; Note: app_voicemail mailboxes must be in the form of mailbox@context.
; mailbox
; session-timers
; session-expires
; session-minse
; session-refresher
; t38pt_usertpsource
; regexten
; fromdomain
; fromuser
; host
; port
; qualify
; keepalive
; defaultip
; defaultuser
; rtptimeout
; rtpholdtimeout
; sendrpid
; outboundproxy
; rfc2833compensate
; callbackextension
; timert1
; timerb
; qualifyfreq
; t38pt_usertpsource
; contactpermit         ; Limit what a host may register as (a neat trick
; contactdeny           ; is to register at the same IP as a SIP provider,
; contactacl            ; then call oneself, and get redirected to that
;                       ; same location).
; directmediapermit
; directmediadeny
; directmediaacl
; unsolicited_mailbox
; use_q850_reason
; maxforwards
; encryption
; description		; Used to provide a description of the peer in console output
; dtlsenable
; dtlsautogeneratecert
; dtlsverify
; dtlsrekey
; dtlscertfile
; dtlsprivatekey
; dtlscipher
; dtlscafile
; dtlscapath
; dtlssetup
; dtlsfingerprint
; ignore_requested_pref ; Ignore the requested codec and determine the preferred codec
;						; from the peer's configuration.