This document aims to teach you how to install and configure chan_extra when purchasing OpenVox GSM products, including the method how to configure GPRS internet access and mincom settings over virtual serial.
Chan_extra-2.0.5 has upgraded several features:
Manually power on/off GSM modem.
Supports WCDMA GSM modem(SIM5215A).
Fix up power management issue.
Supprots USSD sending over CLI commands
Supports SMS receiving when GSM modem is being called.
Supports saving AT commands flow to a flie(/var/log/asterisk/at).
