Hi William, Thanks for the reply. My setup is as follows: Client(Caller)->dialup modem->PBX->FreeSWITCH->PBX-> 4 dialup modems->Server(Receiver) I basically need FreeSWITCH to bridge the incoming call to the best external destination (out of the 4 available), so that the modem training, connection etc can take place smoothly, before exchange of data. I am not sure if mod_fifo would help me in this scenario, as, I would require an agent to dial in and read the fifo. Could you please clarify? Thanks! With regards, Sirish -----Original Message----- From: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch-users-bounces@lists.freeswitch.org] On Behalf Of William King Sent: Monday, 17 December 2012 10:47 AM To: freeswitch-users@lists.freeswitch.org Subject: Re: [Freeswitch-users] Newbie question: Executing Lua scripts for incoming calls, how concurrency is to be handled? Sounds like you want to take a look into mod_fifo. William King Senior Engineer Quentus Technologies, INC 1037 NE 65th St Suite 273 Seattle, WA 98115 Main: (877) 211-9337 Office: (206) 388-4772 Cell: (253) 686-5518 william.king@quentustech.com