Asterisk VOIP server works!
could not find just a command line VOIP client. Need Asterisk server. 

Freeswitch is another VOIP program that I tried first, but could not get work. It had some bug. 
Sometimes started sometimes not and portaudio was newer found although it was installed.

opkg install  
asterisk14    	main program
asterisk14-sounds  	puts sound files under /usr/lib/asterisk/sounds
asterisk14-chan-oss	for USB soundcard or headset.



Tutorial:  
http://www.youtube.com/watch?v=GzQMtXwxPn4&feature=related
See it and you will understand how to set up Asterisk!



Tutorial tells to delete the 2 original files and write them new. 
==========================================
sip.conf  
File where clients 1000 and 1001 are registered. 
Connect to router from SIP programms on PC like Blink or X-lite.  
--------------------------------------------------------------------------
[general]
port=5060
bindaddr=0.0.0.0

[1000]
type=friend
host=dynamic
secret=1000

[1001]
type=friend
host=dynamic
secret=1001
=============================================

=============================
extensions.conf
what to do when number is dialed.
-------------------------------
[default]

exten => 999,1,Answer()
exten => 999,2,Playback(hello-world)
sxten => 999,3,Hangup()

exten => 1001,1,Dial(SIP/1001)
exten => 1000,1,Dial(SIP/1000)

exten => 51,1,Dial(console/dsp,20,A(beep))
exten => 51,2,Hangup()

exten => 60,1,Answer
exten => 60,2,Playback(at-tone-time-exactly)
exten => 60,3,SayUnixTime(,,IMp)
exten => 60,4,Playback(beep)
exten => 60,5,Hangup
=============================
999 plays sound
1000 and 1001 dials to clients  registered on PC
60 tells time
51 is most important for me. When this number is called it connects to USB 
sound card or skype USB adapter. Info under 
http://www.voip-info.org/wiki/view/Setting+up+paging+with+a+sound+card

The buttons on skype adapter do not work.  Control need to do via asterisk
console dial 1000
console hangup
Ring tone on skype headeset adapter does not work. Probably need to get 
some kind of speaker that can be run from USB 5V. Without speaker my mom 
will not notice that someone is calling. My mom does not know how to use computer so I thought that headset attached to router would be ideal, also because of power consumption.


SIP softphone on router would be important for me to call my mom in Riga for free. And she would not need to switch on PC.
Of couse skype is better as it gets through firewalls. And could use Android phone with skype on WiFi.



Informative Asterisk links, too hard for me as a beginner:
https://wiki.koumbit.net/Asterisk14OnOpenWRT
http://www.voip-info.org/wiki/view/Asterisk+quickstart

http://www.voip-info.org/wiki/view/Asterisk+CLI

Setting up paging with a sound card
The definitive guide to soundcard installation, configuration, and usage with Asterisk@Home 2.X


---------------------------------------------
Batch files with CLI
If you meant "can Asterisk read a series of commands from a file" the
answer is no, but something like the following may do:

cat batch-file\
| awk '{printf "/usr/sbin/asterisk -r -x \"%s\"\n", $0}'\
| sh

The above is very slow, though. A faster option is to use socat and write the commands directly to the Asterisk socket.

  #!/bin/sh
  while read line
  do 
     echo -n "$line"
     sleep 0.001
  done \
  | socat STDIN UNIX-CONNECT:/var/run/asterisk/asterisk.ctl

The short sleep is only needed to guarantee that every line is written in a separate write() call. It will not print any output from any command, though, or even report an error. And you'll have to end your "programs" with a "quit" line.
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