[Freeswitch-users] Immediate disconnect while setting up incoming

The setup is a GSM gateway, where I am trying to bridge all incoming calls to the included sims to an external number. The logs are: https://pastebin.freeswitch.org/23714 <https://www.google.com/url?q=https%3A%2F%2Fpastebin.freeswitch.org%2F23714&sa=D&sntz=1&usg=AFQjCNFn6olU7lpG9-4ifMIAfngLrkpvrA> While trying a call to one of the sims, a ring or two can be heard followed by an immediate busy tone, signifying disconnect, which is corroborated by the logs. Why is this sudden disconnect originating? Can someone kindly help? -- Sudhanshu