使用VoIP的代码库，连接SIP服务器时，有一定概率出现长时间连接不到服务器的原因。由于没有开源这部分代码，所以不知道log输出的含义是什么。请帮忙解答一下。
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[11:01:21]E (9213) SIP: Connection failed, error: Success
[11:01:31]W (19213) SIP: CHANGE STATE FROM 0, TO 0, :func: sip_reconnect:313
[11:01:33]I (20413) SIP: Conecting...
[11:01:39]E (27213) SIP: Connection failed, error: Success
[11:01:49]W (37213) SIP: CHANGE STATE FROM 0, TO 0, :func: sip_reconnect:313
[11:01:51]I (38413) SIP: Conecting...
[11:01:57]E (45213) SIP: Connection failed, error: Success
[11:02:07]W (55213) SIP: CHANGE STATE FROM 0, TO 0, :func: sip_reconnect:313
[11:02:09]I (56413) SIP: Conecting...
[11:02:15]E (63213) SIP: Connection failed, error: Success
[11:02:25]W (73213) SIP: CHANGE STATE FROM 0, TO 0, :func: sip_reconnect:313
[11:02:27]I (74413) SIP: Conecting...
[11:02:33]E (81213) SIP: Connection failed, error: Success
[11:02:43]W (91213) SIP: CHANGE STATE FROM 0, TO 0, :func: sip_reconnect:313
[11:02:45]I (92413) SIP: Conecting...
[11:02:51]E (99213) SIP: Connection failed, error: Success
[11:03:01]W (109213) SIP: CHANGE STATE FROM 0, TO 0, :func: sip_reconnect:313
[11:03:03]I (110413) SIP: Conecting...
[11:03:09]E (117213) SIP: Connection failed, error: Success
[11:03:19]W (127213) SIP: CHANGE STATE FROM 0, TO 0, :func: sip_reconnect:313
[11:03:21]I (128413) SIP: Conecting...