I am running about 300 calls at the same time though pbx_spool. I am getting these error messages. Where you see the Call failed to go though reason 5, the call is dropped and never tried again. I looked at the source code in ./pbx/pbx_spool.c and on line 199 I see the message but I can't figure out what the error 5 is or how to fix it. Can anyone help? Feb 5 19:36:20 NOTICE[1318382384]: pbx_spool.c:199 attempt_thread: Call failed to go through, reason 5 -- Call accepted by 66.225.202.72 (format GSM) -- Format for call is GSM Feb 5 19:36:20 NOTICE[1335167792]: pbx_spool.c:199 attempt_thread: Call failed to go through, reason 5 Feb 5 19:36:20 NOTICE[1343560496]: pbx_spool.c:199 attempt_thread: Call failed to go through, reason 5 -- Hungup 'IAX2[NuFone]/22' -- Call accepted by 66.225.202.72 (format GSM) -- Format for call is GSM -- Hungup 'IAX2[NuFone]/23' Feb 5 19:36:20 NOTICE[1351953200]: pbx_spool.c:199 attempt_thread: Call failed to go through, reason 5 -- Call accepted by 66.225.202.72 (format GSM) -- Format for call is GSM Feb 5 19:36:20 NOTICE[1360345904]: pbx_spool.c:199 attempt_thread: Call failed to go through, reason 5 -- Call accepted by 66.225.202.72 (format GSM) -- Format for call is GSM -- Hungup 'IAX2[NuFone]/24' -- Hungup 'IAX2[NuFone]/25' -- Call accepted by 66.225.202.72 (format GSM) -- Format for call is GSM -- Hungup 'IAX2[NuFone]/26' Feb 5 19:36:20 NOTICE[1276418864]: pbx_spool.c:199 attempt_thread: Call failed to go through, reason 5