Muchas gracias por la respuesta Christian,
El mfcr2 show channels me muestra lo siguiente:
Chan Variant Max ANI Max DNIS ANI First Immediate Accept Tx CAS Rx CAS
1 MX 10 4 No No IDLE IDLE
2 MX 10 4 No No IDLE IDLE
3 MX 10 4 No No IDLE IDLE
4 MX 10 4 No No IDLE IDLE
5 MX 10 4 No No IDLE IDLE
6 MX 10 4 No No IDLE IDLE
7 MX 10 4 No No IDLE IDLE
8 MX 10 4 No No IDLE IDLE
9 MX 10 4 No No IDLE IDLE
10 MX 10 4 No No IDLE IDLE
Hice los cambios que me comentas y ahora me muestra esto al hacer llamada:
== Using SIP RTP TOS bits 184
== Using SIP RTP CoS mark 5
-- Executing [0445539994878@from-internal:1] ResetCDR("SIP/2601-00000000", "") in new stack
-- Executing [0445539994878@from-internal:2] NoCDR("SIP/2601-00000000", "") in new stack
-- Executing [0445539994878@from-internal:3] Progress("SIP/2601-00000000", "") in new stack
-- Executing [0445539994878@from-internal:4] Wait("SIP/2601-00000000", "1") in new stack
-- Executing [0445539994878@from-internal:5] Progress("SIP/2601-00000000", "") in new stack
-- Executing [0445539994878@from-internal:6] Playback("SIP/2601-00000000", "silence/1&cannot-complete-as-dialed&check-number-dial-again,noanswer") in new stack
-- <SIP/2601-00000000> Playing 'silence/1.gsm' (language 'en')
-- <SIP/2601-00000000> Playing 'cannot-complete-as-dialed.gsm' (language 'en')
-- <SIP/2601-00000000> Playing 'check-number-dial-again.gsm' (language 'en')
-- Executing [0445539994878@from-internal:7] Wait("SIP/2601-00000000", "1") in new stack
-- Executing [0445539994878@from-internal:8] Congestion("SIP/2601-00000000", "20") in new stack
[2018-03-27 08:58:21] WARNING[C-00000000]: channel.c:4862 ast_prod: Prodding channel 'SIP/2601-00000000' failed
== Spawn extension (from-internal, 0445539994878, 8) exited non-zero on 'SIP/2601-00000000'
-- Executing [h@from-internal:1] Hangup("SIP/2601-00000000", "") in new stack
== Spawn extension (from-internal, h, 1) exited non-zero on 'SIP/2601-00000000'
