InternTel@HFC->Anrufe über SIP+Fallback+Autom. Ortsvorwah

[general]
port        = 5060
bindaddr    = 0.0.0.0
realm       = deinhost.dyndns.org
externip    = deinhost.dyndns.org
localnet    = 192.168.0.0/255.255.255.0
srvlookup   = yes
;default context in extension.conf for incoming calls
;context     = sip-in ; not needed, defined explicitly below
;Codecs
allow       = gsm
allow       = ilbc
allow       = g726
allow       = ulaw
allow       = alaw
canreinvite = no
;tos=['lowdelay', 'throughput', 'reliability', 'mincost', or 'none']
nat         = no
dtmfmode    = info

;Register extension "sip-in" for incoming calls
;You should also set the same extension name "sip-in" as context for each
;sip-context below, to direct all incoming calls to the context "sip-in"
;in your extensions.conf
register    => <sip-user>:<pass>@sipgate.de/sip-in
register    => <sip-user>:<pass>@sip.web.de/sip-in

;web.de context
[webde]
context     = sip-in ;This context in the extensions.conf will be called on an incoming call
type        = friend
username    = <sip-user>
secret      = <pass>
host        = sip.web.de
fromuser    = <sip-user>
fromdomain  = sip.web.de
qualify     = 400
dtmfmode    = info
insecure    = very

;Sipgate context
[sipgate]
context     = sip-in ;This context in the extensions.conf will be called on an incoming call
type        = friend
username    = <sip-user>
secret      = <pass>
host        = sipgate.de
fromuser    = <sip-user>
fromdomain  = sipgate.de
qualify     = 400
dtmfmode    = info
insecure    = very

[general]
static       = yes ;Don't allow asterisk to modifiy this config file
writeprotect = no  ;But allow that the settings may be modified while asterisk is running

[globals]
LOCAL_PREFIX = 0221   ;The prefix for local telephone numbers which will be added when calling a number starting with a non-0 digit
SIPIN_TYPE   = Zap/g1 ;When there is an incoming call from a registered SIP-account, we will call
SIPIN_MSN    = 1      ;an extention with this specified type and MSN

[zap-out]
;Context specified in zapata.conf
;Will be used, when a phone at the zaptel-card dials out

;Matches a dialed number NOT beginning with a 0.
;We'll put the local prefix in front of the number
exten => _Z.,1,Macro(sip-out,${LOCAL_PREFIX}${EXTEN})

;Matches a dialed number beginning with a 0
exten => _0.,1,Macro(sip-out,${EXTEN})

[macro-sip-out]
;Places an outgoing call to a number (ARG1) over several SIP-providers (fallback)
;If the call fails (DIALSTATUS = CHANUNAVAIL or CONGESTION) we will try it with the next provider

exten => s,1,Dial(SIP/${ARG1}@sipgate,60,tT)
exten => s,2,GotoIf($[$[${DIALSTATUS} = CHANUNAVAIL] | $[${DIALSTATUS} = CONGESTION]]? 11 : 12)
exten => s,11,Dial(SIP/${ARG1}@webde,60,tT)
exten => s,12,Congestion
exten => s,13,Busy
exten => s,14,Hangup

;We registered the extension "sip-in" in sip.conf, so we will use it here.
[sip-in]
;This extension will be called, when there is an incoming call on one of our
;registered SIP-accounts. Redirect the call to SIPIN_TYPE/SIPIN_MSN.
exten => sip-in,1,Dial(${SIPIN_TYPE}/${SIPIN_MSN},60,Ttr)

[channels]
switchtype  = euroisdn
signalling  = bri_net_ptmp
pridialplan = local
echocancel  = yes
immediate   = no
overlapdial = yes
group       = 1
context     = zap-out
channel     => 1-2