[Freeswitch-users] Inbound calls from GSM to extension that called person on gsm

[Bipin Patel]

I'm having one client who has a special requirement, i have setup FS for 
them using static XML files and a GSM dongle, they are able to call other 
extensions and gateways as well as dial out of the GSM line but they wanted 
incoming calls from GSM to ring the extension that called the person using 
the GSM line. Meaning extension 1008 calls a number which FS routes out of 
the GSM line so the called party sees the GSM number always and suppose if 
the called party is busy and doesn't answer or rejects call then when later 
he dials back in I want FS to know which extension had called that number 
so incoming calls from the GSM would ring that extension only.

I know I can do this dynamically using XML curl and CDR etc but is there a 
simple way to achieve this using static XML files only as this FS setup is 
very small and very basic