Hola, Benja que tal, hice primero lo que mencionaste pero seguia sin recibir llamadas, en security--advance settings habilite estas opciones:
Enable direct access (Non-embedded) to IssabelPBX:
Enable anonymous SIP calls:
ahora al marcar a la linea hace algo diferente se escucha una contestadora decir
the number you have dial is not in server please check the number and try again.
y ahora el log si registra la entrada de llamada
== Using SIP RTP TOS bits 184
== Using SIP RTP CoS mark 5
-- Executing [2010@from-sip-external:1] NoOp("SIP/sip.nexmo.com-0000006c", "Received incoming SIP connection from unknown peer to 2010") in new stack
-- Executing [2010@from-sip-external:2] Set("SIP/sip.nexmo.com-0000006c", "DID=2010") in new stack
-- Executing [2010@from-sip-external:3] Goto("SIP/sip.nexmo.com-0000006c", "s,1") in new stack
-- Goto (from-sip-external,s,1)
-- Executing [s@from-sip-external:1] GotoIf("SIP/sip.nexmo.com-0000006c", "0?checklang:noanonymous") in new stack
-- Goto (from-sip-external,s,5)
-- Executing [s@from-sip-external:5] Set("SIP/sip.nexmo.com-0000006c", "TIMEOUT(absolute)=15") in new stack
-- Channel will hangup at 2023-05-31 03:53:49.539 UTC.
-- Executing [s@from-sip-external:6] Log("SIP/sip.nexmo.com-0000006c", "WARNING,"Rejecting unknown SIP connection from 216.147.2.2"") in new stack
[2023-05-31 03:53:34] WARNING[21720][C-00004d5a]: Ext. s:6 @ from-sip-external: "Rejecting unknown SIP connection from 216.147.2.2"
-- Executing [s@from-sip-external:7] Answer("SIP/sip.nexmo.com-0000006c", "") in new stack
-- Executing [s@from-sip-external:8] Wait("SIP/sip.nexmo.com-0000006c", "2") in new stack
-- Executing [s@from-sip-external:9] Playback("SIP/sip.nexmo.com-0000006c", "ss-noservice") in new stack
-- <SIP/sip.nexmo.com-0000006c> Playing 'ss-noservice.gsm' (language 'en')
-- Executing [h@from-sip-external:1] Hangup("SIP/sip.nexmo.com-0000006c", "") in new stack
== Spawn extension (from-sip-external, h, 1) exited non-zero on 'SIP/sip.nexmo.com-0000006c'
ip-172-31-3-148*CLI>
ahora todo se reduce al por que la llamada me comenta eso jaja.