Integration of GSM Module With PC Mother Board (GSM Trunking)
Source: Wipro Technologies
The basic idea behind this paper is to integrate GSM module with PC mother board. The GSM Gateway (trunk) that provides GSM Air interface facility to the IP PBX (Asterisk). Making outgoing calls to any GSM mobile/Landline from any registered extension of IP PBX (Asterisk) will bypass costly PSTN line.