[asterisk-users] Error, Clue to what?

[Cary Fitch]

[Apr 26 10:47:01] NOTICE[32151]: chan_sip.c:16223 sip_poke_noanswer: Peer
'3516533812' is now UNREACHABLE!  Last qualify: 86
[Apr 26 10:47:11] NOTICE[32151]: chan_sip.c:12723 handle_response_peerpoke:
Peer '3516533812' is now Reachable. (98ms / 2000ms)
[Apr 26 12:08:49] WARNING[32273]: app_dial.c:1242 dial_exec_full: Unable to
create channel of type 'SIP' (cause 20 - Unknown)
[Apr 26 12:51:20] WARNING[32281]: app_dial.c:1242 dial_exec_full: Unable to
create channel of type 'SIP' (cause 20 - Unknown)
[Apr 26 12:52:56] WARNING[32284]: app_dial.c:1242 dial_exec_full: Unable to
create channel of type 'SIP' (cause 20 - Unknown)
We got here to 351 land
[Apr 26 13:01:01] WARNING[32288]: app_dial.c:1242 dial_exec_full: Unable to
create channel of type 'SIP' (cause 20 - Unknown)
[Apr 26 14:10:01] WARNING[32294]: app_dial.c:1242 dial_exec_full: Unable to
create channel of type 'SIP' (cause 20 - Unknown)
We got here to VOICEPULSE land
We got here to VOICEPULSE land
[Apr 26 14:31:20] NOTICE[32157]: chan_iax2.c:8888 __iax2_poke_noanswer: Peer
'brandy' is now UNREACHABLE! Time: 85
[Apr 26 14:31:30] NOTICE[32163]: chan_iax2.c:7967 socket_process: Peer
'brandy' is now REACHABLE! Time: 117
[Apr 26 15:06:07] WARNING[32300]: app_dial.c:1242 dial_exec_full: Unable to
create channel of type 'SIP' (cause 20 - Unknown)
[Apr 26 16:18:16] WARNING[32309]: app_dial.c:1242 dial_exec_full: Unable to
create channel of type 'SIP' (cause 20 - Unknown)
We got here to IT IS NOT NECESSARY land
We got here to VOICEPULSE land
We got here to VOICEPULSE land
We got here to VOICEPULSE land
We got here to VOICEPULSE land
We got here to VOICEPULSE land
We got here to VOICEPULSE land
[Apr 26 17:42:41] WARNING[32324]: app_dial.c:1242 dial_exec_full: Unable to
create channel of type 'SIP' (cause 20 - Unknown)
[Apr 26 18:18:50] WARNING[32329]: app_dial.c:1242 dial_exec_full: Unable to
create channel of type 'SIP' (cause 20 - Unknown)


What is the (likely) cause of the above errors?

It happens with little channel usage at the time.   I understand that the
peers were not reachable, is the dial exec full message Asterisk's message
that it couldn't communicate with those peers?

Thanks,

Cary Fitch