Asterisk is an OpenSource software for telephony. It is used worldwide to run IPBXes inside companies. This project connects Asterisk to Odoo/OpenERP.
This project also provides a serie of modules (base_phone, base_phone_popup, crm_phone, hr_phone, event_phone, etc...) that are independant from Asterisk and can be usefull on all Odoo/OpenERP installations.
The main maintainer of the Asterisk-OpenERP connector is Alexis de Lattre from Akretion (alexis.delattre _at_ akretion.com).
To know more about the OpenERP-Asterisk connector, refer to the documentation available on the Akretion website http://www.akretion.com/en/products-and-services/openerp-asterisk-voip-connector