I am getting allot of these errors. Its not clear what the problem is?
[2014-03-13 18:28:26] WARNING[10733][C-00001ecc]: chan_sip.c:21937 func_header_read: This function can only be used on SIP channels.
[2014-03-13 18:28:26] WARNING[10733][C-00001ecc]: chan_sip.c:21937 func_header_read: This function can only be used on SIP channels.
[2014-03-13 18:28:27] WARNING[10733][C-00001ecc]: app_dial.c:2437 dial_exec_full: Unable to create channel of type ‘SIP’ (cause 20 - Subscriber absent)
[2014-03-13 18:28:27] WARNING[10734][C-00001ecc]: chan_sip.c:21937 func_header_read: This function can only be used on SIP channels.
[2014-03-13 18:28:27] WARNING[10734][C-00001ecc]: chan_sip.c:21937 func_header_read: This function can only be used on SIP channels.
[2014-03-13 18:28:27] WARNING[10734][C-00001ecc]: chan_sip.c:21937 func_header_read: This function can only be used on SIP channels.
[2014-03-13 18:28:27] WARNING[10734][C-00001ecc]: chan_sip.c:21937 func_header_read: This function can only be used on SIP channels.
[2014-03-13 18:28:27] WARNING[10734][C-00001ecc]: app_dial.c:2437 dial_exec_full: Unable to create channel of type ‘SIP’ (cause 20 - Subscriber absent)
[2014-03-13 18:28:27] WARNING[10735][C-00001ecc]: chan_sip.c:21937 func_header_read: This function can only be used on SIP channels.
[2014-03-13 18:28:27] WARNING[10735][C-00001ecc]: chan_sip.c:21937 func_header_read: This function can only be used on SIP channels.
[2014-03-13 18:28:27] WARNING[10735][C-00001ecc]: chan_sip.c:21937 func_header_read: This function can only be used on SIP channels.
[2014-03-13 18:28:27] WARNING[10735][C-00001ecc]: chan_sip.c:21937 func_header_read: This function can only be used on SIP channels.
[2014-03-13 18:28:27] WARNING[10736][C-00001ecc]: chan_sip.c:21937 func_header_read: This function can only be used on SIP channels.
[2014-03-13 18:28:27] WARNING[10736][C-00001ecc]: chan_sip.c:21937 func_header_read: This function can only be used on SIP channels.
[2014-03-13 18:28:27] WARNING[10736][C-00001ecc]: chan_sip.c:21937 func_header_read: This function can only be used on SIP channels.
[2014-03-13 18:28:27] WARNING[10736][C-00001ecc]: chan_sip.c:21937 func_header_read: This function can only be used on SIP channels.
[2014-03-13 18:28:27] WARNING[10737][C-00001ecc]: chan_sip.c:21937 func_header_read: This function can only be used on SIP channels.
[2014-03-13 18:28:27] WARNING[10737][C-00001ecc]: chan_sip.c:21937 func_header_read: This function can only be used on SIP channels.
[2014-03-13 18:28:27] WARNING[10737][C-00001ecc]: chan_sip.c:21937 func_header_read: This function can only be used on SIP channels.