*CLI> [Mar 19 11:58:00] NOTICE[5912]: chan_sip.c:14934 sip_poke_noanswer: Peer '204' is now UNREACHABLE!  Last qualify: 0
    -- Starting simple switch on 'Zap/2-1'
    -- Remote UNIX connection
    -- Executing [939123456789@pstn:1] Dial("Zap/2-1", "Sip/939123456789@Y.Y.Y.Y:5070|30|rT") in new stack  (Y.Y.Y.Y HS IP)
    -- Called 939123456789@Y.Y.Y.Y:5070
[Mar 19 11:58:38] NOTICE[5912]: chan_sip.c:11719 handle_response_invite: Failed to authenticate on INVITE to '"sipusername" <sip:sipusername@X.X.X.X:5070>;tag=as27fa19f0' (X.X.X.X my asterisk IP)
    -- SIP/Y.Y.Y.Y:5070-081e1458 is circuit-busy
  == Everyone is busy/congested at this time (1:0/1/0)
    -- Hungup 'Zap/2-1'