All, I have tested connectivity from app_rpt to tlb and the connections appear to work just fine, however forming connections in the other direction, from tlb to app_rpt, fail. Below is the output of asterisk when a connection attempt is made. Can anybody provide some guidance on how to make this work properly? Robert N5QM Connected to Asterisk currently running on asl (pid = 2832) Verbosity is at least 3 -- tlb: new CALL = N5UFO-R, ip = 99.65.40.102, port = 2074 -- tlb: tx codec set to G726 == Starting tlb/tlb0-4 at radio-secure,20859,1 failed so falling back to exten 's' == Starting tlb/tlb0-4 at radio-secure,s,1 still failed so falling back to context 'default' -- Sent into invalid extension 's' in context 'default' on tlb/tlb0-4 -- Executing [i@default:1] Hangup("tlb/tlb0-4", "") in new stack == Spawn extension (default, i, 1) exited non-zero on 'tlb/tlb0-4'