NANO*CLI> sip show registry
Host                            Username       Refresh State                Reg.Time
    -- Executing [4171@default:1] Dial("SIP/zyxel-081ca498", "SIP/171@1123513:5060") in new stack
    -- Called 171@1123513:5060
[Apr 30 09:59:40] WARNING[19722]: chan_sip.c:11843 handle_response_invite: Received response: "Forbidden" from '"Edgar WiFi" <sip:15@70.100.235.159>;tag=as3c867eef'
    -- SIP/1123513:5060-081e6140 is circuit-busy
  == Everyone is busy/congested at this time (1:0/1/0)
    -- Executing [4171@default:2] Congestion("SIP/zyxel-081ca498", "") in new stack
  == Spawn extension (default, 4171, 2) exited non-zero on 'SIP/zyxel-081ca498'
NANO*CLI>