FAQ

Asterisk Errors

What is this error? WARNING[23261]: res_musiconhold.c:719 monmp3thread: poll() failed: Interrupted system call

Nothing to worry, when the Musing On Hold process terminates to play the media file, this error is thrown out, just ignore it

What is this error? WARNING[3221]: func_cdr.c:352 cdr_write_callback: CDR requires a value (CDR(variable)=value)

Nothing to worry, it is a small glitch in the dialplan, but avoiding it will require an extra check, slowing down the call processing, so it is avoided, preferring the warning. Just ignore it.

What is this error? ERROR[24984][C-00008457]: res_fax.c:4364 acf_faxopt_read: channel 'SIP/201-#######-0001547a' can't read FAXOPT(gateway) because it has never been written.

Nothing to worry, it is a small glitch in the dialplan, but avoiding it will require an extra check, slowing down the call processing, so it is avoided, preferring the error. Just ignore it.

What is this error? WARNING[3221]: func_cdr.c:364 cdr_write_callback: Using the CDR function to set 'accountcode' is deprecated. Please use the CHANNEL function instead.

I am using an old syntax to preserve compatibility with older asterisk versions. Just ignore it.

What is this error? WARNING[25144][C-0000845c]: dsp.c:1489 ast_dsp_process: Inband DTMF is not supported on codec #####. Use RFC2833

This is important, you are using an incompatible DTMF format for the codec you selected. Inband DTMF is supported in only a limited number of codec. Use RFC2833 as suggested.

What is this error? NOTICE[9505] manager.c: 217.28.216.250 tried to authenticate with nonexistent user 'admin'

What is this error? NOTICE[9505] manager.c: 217.28.216.250 failed to authenticate as 'admin'

Someone really stupid is trying to connect using the manager interface (port 5038). The manager interface is often locked down by IP address so it is really unlikely to be hacked this way, however this can be just annoying. To stop it after a few attempts, you can tweak the fail2ban to capture also these attempts by adding the following row in /etc/fail2ban/filters.d/asterisk.conf: ^(%(__prefix_line)s|\[\]\s*)%(log_prefix)s <HOST> failed to authenticate as '[^']*'$ and reload fail2ban

What is this error? WARNING[26421][C-0000b22f]: chan_sip.c:7350 sip_write: Can't send 10 type frames with SIP write

Asterisk doesn't yet support comfort noise generation. Just ignore it.

What is this error? NOTICE[6534] chan_sip.c: Received SIP subscribe for peer without mailbox: 226-SINI

The extension 226-SINI has sent a "SUBSCRIBE" message to asterisk, but the extension has no voicemail mailbox associated. This can be due to a configuration problem, you forget to associate the MWI mailbox in Configuration/Extension, or an asterisk problem... some time asterisk loads the extension without the mailbox associated. In this case you can restart the phone and deregister the extension, in this way when the phone registers again and subscribe to the voicemail mailbox, it should be loaded correctly. Otherwise you can move that extension to "No (Use externnotify)" in "Send MWI only if subscribed:" and set externnotify=/var/lib/asterisk/agi-bin/vmnotify.php in /etc/asterisk/voicemail.conf

What is this error? WARNING[53344][C-000015c8] app_voicemail.c: SQL Get Data error! coltitle=category

This is a long standing asterisk bug fixed only in later releases... it is harmless and can be ignored

Linux System

When a conference is going to start, I get the message app_meetme.c:1296 build_conf: Unable to open DAHDI pseudo device

It seems the dahdi kernel module is not started or not compiled/available for your running kernel. It is possible you have upgraded your kernel and restarted your system. Try restarting the dahdi by using the command:

/etc/init.d/dahdi restart

If it doesn't fix the issue, try recompiling dahdi module, going in /usr/local/src/dahdilinux-complete-* and running:

make
make install
/etc/init.d/dahdi restart

The web interface session is expiring too often, I need always to reauthenticate, how can I make it run longer?

You should change the session timeout value in php.ini and then restart the web server process, by default is 2880 seconds, set as long as you like

session.gc_maxlifetime = 2880

How can I upgrade to PHP 5.5 to use AWS S3 Storage?

System is now shipped with PHP 5.5 already installed, but previous installations were using the standard PHP version which is not suitable for AWS S3 because it requires PHP 5.5. On CentOS 6 64bit You can upgrade with the following steps:

rpm -Uvh https://mirror.webtatic.com/yum/el6/latest.rpm
yum -y install yum-plugin-replace
yum replace php-common --replace-with=php55w-common
yum install php55w-opcache
rpm --import https://mirror.webtatic.com/yum/RPM-GPG-KEY-webtatic-andy
service httpd restart