; ============================================================
; AstroCom SIP Bridge — SIP Configuration (chan_sip)
; /etc/asterisk/sip.conf
;
; Downstream PBXes REGISTER to this server.
; Each bridge has one [bridgeN-pbx] peer with host=dynamic.
;
; The PBX must be configured to register with:
;   Registrar : <this server's IP>:5060
;   Username  : bridgeN-pbx  (the section name below)
;   Password  : the 'secret' value below
;
; 'context' is where calls FROM the PBX land (outbound to AstroCom).
; It must match [bridgeN-from-pbx] in extensions.conf.
; ============================================================

[general]
bindport=5060
bindaddr=0.0.0.0
realm=ac-sip-bridge
srvlookup=no
; NAT handling — set to 'force_rport,comedia' if PBX is behind NAT
nat=no
qualify=no
disallow=all
allow=ulaw
allow=alaw
allow=g729

; ============================================================
; Shared peer template
; ============================================================
[bridge-sip-tmpl](!)
type=friend
host=dynamic             ; IP is learned from the REGISTER request
dtmfmode=rfc2833
canreinvite=no
disallow=all
allow=ulaw
allow=alaw
allow=g729
qualify=yes
; No 'insecure=' — registration provides proper authentication.
; Removing it means unauthenticated INVITEs from unknown IPs are rejected.

; ============================================================
; BRIDGE 1
;   PBX registers as username 'bridge1-pbx' with the secret below.
;   Outbound to this PBX: Dial(SIP/bridge1-pbx/<exten>)
;     → delivered to the registered contact URI.
; ============================================================
[bridge1-pbx](bridge-sip-tmpl)
secret=1242ebce8b420ee4723887ffe0a01211330851776862e6021f680f1406c94eff
; If the PBX must register with a different username, set it here:
;username=bridge1
fromuser=bridge1-pbx     ; identity used in outbound SIP From: headers
context=bridge1-from-pbx

; ============================================================
; BRIDGE 2
;   PBX registers as username 'bridge2-pbx' with the secret below.
; ============================================================
[bridge2-pbx](bridge-sip-tmpl)
secret=BRIDGE2_SIP_SECRET
fromuser=bridge2-pbx
context=bridge2-from-pbx

; ============================================================
; Additional bridges — copy this block and increment N
; ============================================================
;[bridge3-pbx](bridge-sip-tmpl)
;secret=BRIDGE3_SIP_SECRET
;fromuser=bridge3-pbx
;context=bridge3-from-pbx