; ============================================================
; AstroCom SIP Bridge — Dialplan (extensions.conf)
; /etc/asterisk/extensions.conf
;
; CALL FLOW
; ─────────────────────────────────────────────────────────────
;
;   INBOUND from AstroCom (IAX2 → SIP toward downstream PBX):
;
;     AstroCom  ──IAX2──▶  [bridgeN-from-astrocom]
;                                   │
;                           Bridge to SIP peer
;                                   │
;                           SIP/bridgeN-pbx/<EXTEN>
;                                   │
;                                   ▼
;                          Downstream PBX / phone
;
;   OUTBOUND from downstream PBX (SIP → IAX2 toward AstroCom):
;
;     Downstream PBX  ──SIP──▶  [bridgeN-from-pbx]
;                                       │
;                               Bridge to IAX2 peer
;                                       │
;                               IAX2/bridge1-astrocom/<EXTEN>
;                                       │
;                                       ▼
;                                  AstroCom
;
; ISOLATION
; ─────────────────────────────────────────────────────────────
;   • Each bridge uses its own pair of contexts
;     (bridgeN-from-astrocom / bridgeN-from-pbx).
;   • No cross-bridge dialplan references exist UNLESS you
;     explicitly uncomment the inter-bridge section at the
;     bottom.  Until then each bridge is a closed island.
;   • The [default] context is intentionally empty / drops
;     calls to prevent anything landing there from escaping.
; ============================================================

; ============================================================
; Safety net — calls that arrive in no recognised context are
; silently dropped.
; ============================================================
[default]
exten => _X.,1,Verbose(2,DROP: call to ${EXTEN} landed in [default] — no context matched)
 same  => n,Hangup(21)

; ============================================================
; ─── BRIDGE 1 ───────────────────────────────────────────────
; ============================================================

; ------ Inbound from AstroCom → forward to Bridge-1 PBX ----
; This context name MUST equal routes.auth for this bridge.
[bridge1-from-astrocom]
; Accept any extension that AstroCom sends for this block.
exten => _X.,1,Verbose(2,BRIDGE1 inbound from AstroCom: ${CALLERID(all)} → ${EXTEN})
 same  => n,Set(CALLERID(name)=${CALLERID(name)})
 same  => n,Dial(SIP/bridge1-pbx/${EXTEN},30,t)
 same  => n,GotoIf($["${DIALSTATUS}" = "CONGESTION"]?congestion)
 same  => n,GotoIf($["${DIALSTATUS}" = "BUSY"]?busy)
 same  => n,GotoIf($["${DIALSTATUS}" = "NOANSWER"]?noanswer)
 same  => n,Hangup()

 same  => n(congestion),Congestion(5)
 same  => n(busy),Busy(5)
 same  => n(noanswer),Hangup(19)

; ------ Inbound from Bridge-1 PBX → forward to AstroCom ----
[bridge1-from-pbx]
exten => _X.,1,Verbose(2,BRIDGE1 outbound from PBX: ${CALLERID(all)} → ${EXTEN})
 ; Strip any leading '9' access code the PBX may prepend, e.g. "9XXXXXXX"
 ; Uncomment/adapt if needed:
 ;same => n,Set(EXTEN=${EXTEN:1})
 same  => n,Set(CALLERID(name)=${CALLERID(name)})
 same  => n,Dial(IAX2/bridge1-astrocom/${EXTEN},30,t)
 same  => n,GotoIf($["${DIALSTATUS}" = "CONGESTION"]?congestion)
 same  => n,GotoIf($["${DIALSTATUS}" = "BUSY"]?busy)
 same  => n,GotoIf($["${DIALSTATUS}" = "NOANSWER"]?noanswer)
 same  => n,Hangup()

 same  => n(congestion),Congestion(5)
 same  => n(busy),Busy(5)
 same  => n(noanswer),Hangup(19)

; ============================================================
; ─── BRIDGE 2 ───────────────────────────────────────────────
; ============================================================

[bridge2-from-astrocom]
exten => _X.,1,Verbose(2,BRIDGE2 inbound from AstroCom: ${CALLERID(all)} → ${EXTEN})
 same  => n,Set(CALLERID(name)=${CALLERID(name)})
 same  => n,Dial(SIP/bridge2-pbx/${EXTEN},30,t)
 same  => n,GotoIf($["${DIALSTATUS}" = "CONGESTION"]?congestion)
 same  => n,GotoIf($["${DIALSTATUS}" = "BUSY"]?busy)
 same  => n,GotoIf($["${DIALSTATUS}" = "NOANSWER"]?noanswer)
 same  => n,Hangup()

 same  => n(congestion),Congestion(5)
 same  => n(busy),Busy(5)
 same  => n(noanswer),Hangup(19)

[bridge2-from-pbx]
exten => _X.,1,Verbose(2,BRIDGE2 outbound from PBX: ${CALLERID(all)} → ${EXTEN})
 same  => n,Set(CALLERID(name)=${CALLERID(name)})
 same  => n,Dial(IAX2/bridge2-astrocom/${EXTEN},30,t)
 same  => n,GotoIf($["${DIALSTATUS}" = "CONGESTION"]?congestion)
 same  => n,GotoIf($["${DIALSTATUS}" = "BUSY"]?busy)
 same  => n,GotoIf($["${DIALSTATUS}" = "NOANSWER"]?noanswer)
 same  => n,Hangup()

 same  => n(congestion),Congestion(5)
 same  => n(busy),Busy(5)
 same  => n(noanswer),Hangup(19)

; ============================================================
; ─── BRIDGE 3 (template — duplicate & uncomment) ────────────
; ============================================================
;[bridge3-from-astrocom]
;exten => _X.,1,Verbose(2,BRIDGE3 inbound from AstroCom: ${CALLERID(all)} → ${EXTEN})
; same  => n,Dial(SIP/bridge3-pbx/${EXTEN},30,t)
; same  => n,Hangup()
;
;[bridge3-from-pbx]
;exten => _X.,1,Verbose(2,BRIDGE3 outbound from PBX: ${CALLERID(all)} → ${EXTEN})
; same  => n,Dial(IAX2/bridge3-astrocom/${EXTEN},30,t)
; same  => n,Hangup()

; ============================================================
; ─── OPTIONAL: Inter-bridge dialling ────────────────────────
;
; If you want Bridge-1's PBX to be able to call Bridge-2's
; numbers *directly* (without round-tripping through AstroCom)
; you can include the other bridge's inbound SIP context here.
;
; Example: in [bridge1-from-pbx], add a pattern for Bridge-2's
; number block *before* the catch-all _X. rule so it is
; preferred.  Bridge-2's block in AstroCom is consulted to
; determine the number range.
;
;[bridge1-from-pbx]
;exten => _7XXXX,1,Verbose(2,BRIDGE1→BRIDGE2 direct: ${EXTEN})
; same  => n,Dial(SIP/bridge2-pbx/${EXTEN},30,t)
; same  => n,Hangup()
;
; Without uncommenting the above, bridge1 and bridge2 can still
; reach each other — calls just travel via AstroCom as normal.
; ============================================================