; =====================================================;  GLOBALS REQUIRED (globals.conf or globals_custom.conf)
; -------------------------------------------------------------
;  [globals]
;  BRIDGE1_APIKEY=<routes.apiKey for bridge 1>
;  BRIDGE1_EXCHANGE=777   ; NXX prefix — used to build the outbound ANI only,
;                         ; NOT applied to inbound DIDs (full number passes through)
;  BRIDGE2_APIKEY=<routes.apiKey for bridge 2>
;  BRIDGE2_EXCHANGE=888
;  ; ...add one pair per bridge; AstroCom SIP Bridge -- Dialplan (extensions.conf)
; /etc/asterisk/extensions.conf
;
; CALL FLOWS
; -------------------------------------------------------------
;
;  INBOUND  (AstroCom -> downstream PBX via PJSIP)
;  -----------------------------------------------
;  AstroCom delivers the full 7-digit number, e.g. 7771234.
;  The full number is forwarded as-is to the downstream PBX as
;  the SIP Request-URI / To: user (DID).  The PBX is responsible
;  for routing it internally however it sees fit.
;
;     AstroCom --IAX2--> [bridgeN-from-astrocom]
;                                |
;              Pass full DID (e.g. 7771234) to PBX
;                                |
;                   Dial PJSIP/7771234@bridgeN-pbx
;                                |
;                                v
;                        Downstream PBX
;
;  OUTBOUND  (downstream PBX -> AstroCom via IAX2)
;  ------------------------------------------------
;  The PBX dials the full 7-digit AstroCom number.
;  The bridge prepends the local exchange so the ANI is also
;  7 digits, then hits the AstroCom routing API:
;
;    GET https://api.astrocom.tel/api/v1/route/<apiKey>/<ANI>/<number>
;
;  The API returns one of:
;    "local"
;      --> same block; route to this bridge's own SIP PBX
;    "IAX2/<auth>:<secret>@<host>:<port>/<number>"
;      --> dial that URI verbatim
;    "<MSG_ROUTE_ADDRESS>/4xx"
;      --> rejected; play busy/congestion toward PBX
;
;     Downstream PBX --SIP--> [bridgeN-from-pbx]
;                                     |
;              CURL api.astrocom.tel/api/v1/route/...
;                                     |
;                          +----------+----------+
;                        local               IAX2 URI
;                          |                     |
;            Dial PJSIP/XXXX@bridgeN-pbx   Dial ${lookup}
;
; ISOLATION
; -------------------------------------------------------------
;  * Every bridge has exactly two contexts; they share nothing.
;  * [default] silently drops anything with no context match.
;  * Inter-bridge calls route through AstroCom automatically --
;    no extra config needed here.
;
; GLOBALS REQUIRED (globals.conf or globals_custom.conf)
; -------------------------------------------------------------
;  [globals]
;  BRIDGE1_APIKEY=<routes.apiKey for bridge 1>
;  BRIDGE1_EXCHANGE=777   ; NXX prefix (3 digits) for bridge 1
;  BRIDGE2_APIKEY=<routes.apiKey for bridge 2>
;  BRIDGE2_EXCHANGE=888
;  ; ...add one pair per bridge
; ============================================================

[default]
exten => _X!,1,Verbose(2,DROP: ${EXTEN} landed in [default] -- no matching context)
 same  => n,Hangup(21)

; ============================================================
; --- BRIDGE 1 -----------------------------------------------
; ============================================================

; Inbound from AstroCom -> forward full DID to PBX
; Context name == routes.auth == IAX2 section name in iax.conf
[bridge1-from-astrocom]
exten => _XXXXXXX,1,Verbose(2,BRIDGE1 inbound from AstroCom: ${CALLERID(all)} -> ${EXTEN})
 same  => n,Dial(PJSIP/${EXTEN}@bridge1-pbx,30,t)
 same  => n,GotoIf($["${DIALSTATUS}" = "BUSY"]?busy)
 same  => n,GotoIf($["${DIALSTATUS}" = "CONGESTION"]?congestion)
 same  => n,GotoIf($["${DIALSTATUS}" = "NOANSWER"]?noanswer)
 same  => n,Hangup()
 same  => n(busy),Busy(5)
 same  => n(congestion),Congestion(5)
 same  => n(noanswer),Hangup(19)

; Outbound from Bridge-1 PBX -> CURL AstroCom API -> IAX2
[bridge1-from-pbx]
exten => _XXXXXXX,1,Verbose(2,BRIDGE1 outbound from PBX: ${CALLERID(all)} -> ${EXTEN})
 ; Build the 7-digit ANI: exchange prefix + bare extension from CallerID
 same  => n,Set(ANI=${BRIDGE1_EXCHANGE}${FILTER(0-9,${CALLERID(num)})})
 ; Ask AstroCom where to send this call
 same  => n,Set(lookup=${CURL(https://api.astrocom.tel/api/v1/route/${BRIDGE1_APIKEY}/${ANI}/${EXTEN})})
 same  => n,Verbose(2,BRIDGE1 AstroCom lookup: ${lookup})
 ; "local" -- callee shares our block, route to our own SIP PBX
 same  => n,GotoIf($["${lookup}" = "local"]?local)
 ; Empty or error URL -- reject
 same  => n,GotoIf($["${lookup}" = ""]?reject)
 ; Valid IAX2 URI -- dial it verbatim
 same  => n,Dial(${lookup},30,t)
 same  => n,GotoIf($["${DIALSTATUS}" = "BUSY"]?busy)
 same  => n,GotoIf($["${DIALSTATUS}" = "CONGESTION"]?congestion)
 same  => n,GotoIf($["${DIALSTATUS}" = "NOANSWER"]?noanswer)
 same  => n,Hangup()
 ; Local path -- strip exchange prefix, dial extension on own PBX
 same  => n(local),Verbose(2,BRIDGE1 local call: routing ${EXTEN} to own PBX)
 same  => n,Dial(PJSIP/${EXTEN}@bridge1-pbx,30,t)
 same  => n,Hangup()
 ; Error paths
 same  => n(reject),Verbose(2,BRIDGE1 AstroCom rejected call: ${lookup})
 same  => n,Congestion(5)
 same  => n(busy),Busy(5)
 same  => n(congestion),Congestion(5)
 same  => n(noanswer),Hangup(19)

; ============================================================
; --- BRIDGE 3 (copy & uncomment for each additional bridge) -
; ============================================================
; Also add BRIDGE3_APIKEY and BRIDGE3_EXCHANGE to globals.conf.
;
;[bridge3-from-astrocom]
;exten => _X!,1,Verbose(2,BRIDGE3 inbound: ${CALLERID(all)} -> ${EXTEN})
; same  => n,Dial(PJSIP/${EXTEN}@bridge3-pbx,30,t)
; same  => n,Hangup()
;
;[bridge3-from-pbx]
;exten => _X!,1,Verbose(2,BRIDGE3 outbound: ${CALLERID(all)} -> ${EXTEN})
; same  => n,Set(ANI=${BRIDGE3_EXCHANGE}${FILTER(0-9,${CALLERID(num)})})
; same  => n,Set(lookup=${CURL(https://api.astrocom.tel/api/v1/route/${BRIDGE3_APIKEY}/${ANI}/${EXTEN})})
; same  => n,GotoIf($["${lookup}" = "local"]?local)
; same  => n,GotoIf($["${lookup}" = ""]?reject)
; same  => n,Dial(${lookup},30,t)
; same  => n,Hangup()
; same  => n(local),Dial(PJSIP/${EXTEN}@bridge3-pbx,30,t)
; same  => n,Hangup()
; same  => n(reject),Congestion(5)

; ============================================================
; --- OPTIONAL: Direct SIP inter-bridge shortcut -------------
;
; Bridges can already call each other through AstroCom with
; zero extra config.  If you want direct SIP routing between
; bridges (no AstroCom hop), add a higher-priority pattern for
; the other bridge's block BEFORE the _X! catch-all.
;
; Example -- Bridge-1 calling Bridge-2's 888XXXX block directly:
;
;[bridge1-from-pbx]
;exten => _888XXXX,1,Verbose(2,BRIDGE1->BRIDGE2 direct: ${EXTEN})
; same  => n,Dial(PJSIP/${EXTEN}@bridge2-pbx,30,t)
; same  => n,Hangup()
;
; (The _X! rule below then handles all other numbers normally.)
; ============================================================