Used third-party libraries

• pyst Interface with Asterisk using either AGI or Manager interfaces
• sqlalchemy Database interface

Setup development environment

$ virutalenv venv
$ source venv/bin/activate
$ pip install --allow-external pyst --allow-unverified pyst -r requirements.txt

Database setup

Each SIP user must be inserted in the database of users with a balance. The python code snippet below is an example of a insertion of two users.

from models import session, User
session.add_all([User(clid='100000000', name='PSB', balance=100),
                User(clid='200000000', name='LaPS', balance=100)
                ])
session.commit()

Asterisk setup

With a working Asterisk server you must have at least two SIP accounts. An example of the corresponding section of sip.conf follows.

[1000000000]
type=friend
secret=laps
host=dynamic
context=celcom

[2000000000]
type=friend
secret=laps
host=dynamic
context=celcom

The referenced context in sip.conf must exist in the extensions.conf the code bellow is an example.

[celcom]
exten => _ZXXXXXXXX,1,AGI(celcombiller)

Celcombiller is an AGI, implemented in the file celcombiller.py and it must run in the virtual environment created in the first section, a file with something like the content below should be created in /var/lib/asterisk/agi-bin with execution permission.

#!/bin/bash
/home/psb/Dropbox/git-projects/celcombiller/venv/bin/python /home/psb/git-projects/celcombiller/celcombiller.py