今天要测试我写的一个程序，需要连接asterisk的ami接口，但是服务器上的asterisk没有启动。
输入启动命令：/usr/sbin/asterisk start
之后，再输入命令：asterisk -vvvr
出现提示：Unable to connect to remote asterisk (does /var/run/asterisk/asterisk.ctl exist?)
还是无法启动。在网上搜索了好几次，都没有正确的，后来总算找到了一个比较对的。
解决方法如下所示：
应该是修改过/etc/asterisk/zapata.conf文件，加了一行busydetect=yes
我用WinScp连接上服务器，查看了zapata.conf，果然是找到了busydetect=yes
于是用了下面的解决方法：
/var/run/asterisk/amportal stop
出现提示信息：
STOPPING ASTERISK
STOPPING FOP SERVER
然后再输入命令：
service asterisk stop
service zaptel stop
之后在输入命令：
service asterisk start
出现提示信息：
Automatically restarting Asterisk.
Asterisk ended with exit status 1
Asterisk died with code 1.
循环出现这个提示信息，让我都不能再输入命令了。所以我关了putty，另外再开了一个putty。（下次就不能再犯这个错误了。这个service asterisk start命令应该是在加载所有模块之后再使用的。）
/var/run/asterisk/amportal start
出现下面的提示信息：
SETTING FILE PERMISSIONS
Permissions OK
STARTING ASTERISK
Asterisk ended with exit status 1
Asterisk died with code 1.
Automatically restarting Asterisk.
Asterisk ended with exit status 1
Asterisk died with code 1.
Automatically restarting Asterisk.
mpg123: no process killed
-----------------------------------------------------
Asterisk could not start!
Use 'tail /var/log/asterisk/full' to find out why.
于是输入tail /var/log/asterisk/full命令查看出错信息：
Jan 19 10:48:39 VERBOSE[32752] logger.c: [chan_skinny.so]Jan 19
10:48:39 VERBOSE[32752] logger.c: [chan_skinny.so] => (Skinny Client
Control Protocol (Skinny))
Jan 19 10:48:39 VERBOSE[32752] logger.c: == Parsing
'/etc/asterisk/skinny.conf': Jan 19 10:48:39 VERBOSE[32752] logger.c:
== Parsing '/etc/asterisk/skinny.conf': Found
Jan 19 10:48:39 VERBOSE[32752] logger.c: == Skinny listening on 0.0.0.0:2000
Jan 19 10:48:39 VERBOSE[32752] logger.c: == Registered channel type 'Skinny' (Skinny Client Control Protocol (Skinny))
Jan 19 10:48:39 VERBOSE[32752] logger.c: [chan_zap.so]Jan 19 10:48:39
VERBOSE[32752] logger.c: [chan_zap.so] => (Zapata Telephony w/PRI)
Jan 19 10:48:39 VERBOSE[32752] logger.c: == Parsing
'/etc/asterisk/zapata.conf': Jan 19 10:48:39 VERBOSE[32752] logger.c:
== Parsing '/etc/asterisk/zapata.conf': Found
Jan 19 10:48:39 VERBOSE[32752] logger.c: == Parsing
'/etc/asterisk/zapata-channels.conf': Jan 19 10:48:39 VERBOSE[32752]
logger.c: == Parsing '/etc/asterisk/zapata-channels.conf': Found
Jan 19 10:48:39 ERROR[32752] chan_zap.c: Unable to open /dev/zap/ctl to set toneduration
Jan 19 10:48:39 WARNING[32752] loader.c: chan_zap.so: load_module failed, returning -1
Jan 19 10:48:39 WARNING[32752] loader.c: Loading module chan_zap.so failed!
根据所得到的信息，应该是加载模块的时候出错。
于是我另外开了一个putty连接上服务器，在命令行下输入
service zaptel start
出现提示信息：
Loading zaptel framework: [ok]
Waiting for zap to come online...OK
Loading zaptel hardware modules:No hardware timing source found in /proc/zaptel, loading ztdummy
Running ztcfg: [ok]
然后我再输入命令：
asterisk -vvvr
出现提示信息：
== Parsing '/etc/asterisk/asterisk.conf': Found
== Parsing '/etc/asterisk/extconfig.conf': Found
Asterisk 1.2.24, Copyright (C) 1999 - 2007 Digium, Inc. and others.
Created by Mark Spencer <markster@digium.com>
Asterisk comes with ABSOLUTELY NO WARRANTY; type 'show warranty' for details.
This is free software, with components licensed under the GNU General Public
License version 2 and other licenses; you are welcome to redistribute it under
certain conditions. Type 'show license' for details.
=========================================================================
Connected to Asterisk 1.2.24 currently running on localhost (pid = 419)
Verbosity was 0 and is now 3
-- Executing Answer("SIP/6008-0a0bb0b0", "") in new stack
-- Executing INTERACT("SIP/6008-0a0bb0b0", "/root/interact") in new stack
-- Remote UNIX connection
-- Executing Hangup("SIP/6008-0a0bb0b0", "") in new stack
== Spawn extension (schtest, 5014, 3) exited non-zero on 'SIP/6008-0a0bb0b0'
-- Registered SIP '6004' at 192.168.20.108 port 39726 expires 3600
启动asterisk成功！！好！！好开心啊！！O(∩_∩)O哈哈~