Asterisk modules are not loading

About

If Asterisk server are failing with various hang up causes server or is giving these responses:

Asterisk CLI output

   -- Executing [88518888@mor:4] Set("Zap/29-1", "TIMEOUT(response)=20") in new stack

[2011-12-25 17:13:27] ERROR[7591]: pbx.c:1584 ast_func_write: Function TIMEOUT not registered

   -- Executing [88518888@mor:5] Set("Zap/29-1", "TIMEOUT(digit)=10") in new stack

[2011-12-25 17:13:27] ERROR[7591]: pbx.c:1584 ast_func_write: Function TIMEOUT not registered

Either:

[2011-12-25 17:19:14] WARNING[9047]: config.c:1335 find_engine: Realtime mapping for 'realtime_ext' found to engine 'mysql', but the engine is not available

[2011-12-25 17:19:14] WARNING[9047]: config.c:1335 find_engine: Realtime mapping for 'realtime_ext' found to engine 'mysql', but the engine is not available

Reason

These errors happens because network is not working and Asterisk cannot start.

This mean that necessary functions are not loaded to Asterisk yet due to network lag.

Some modules need network connectivity in order to load properly.

Try to use ping command to detect network packets losses.
Exapmle:

ping 22.19.13.71 

PING 22.19.13.71 (22.19.13.71) 56(84) bytes of data.

--- 22.19.13.71 ping statistics ---
86 packets transmitted, 0 received, 100% packet loss, time 85003ms

How to solve

If you see packet loss please contact your Datacenter or Internet Provider.
Fix the internet connection and system should work fine.