telebox*CLI> sip filter add peer 2013
telebox*CLI> sip debug 1
SIP Debug level 1 Enabled
DIR Sip data                                                                         Peer       CSeq  IP
<-- INVITE sip:2016@192.168.10.1;user=phone SIP/2.0                                  2013       39856 192.168.10.3
--> SIP/2.0 407 Proxy Authentication Required                                        2013       39856 192.168.10.3
<-- ACK sip:2016@192.168.10.1 SIP/2.0                                                2013       39856 192.168.10.3
<-- INVITE sip:2016@192.168.10.1 SIP/2.0                                             2013       39857 192.168.10.3
--> SIP/2.0 100 Trying                                                               2013       39857 192.168.10.3
    -- Executing Dial("SIP/2013-7600", "SIP/2016|10|tr") in new stack
    -- Called 2016
--> SIP/2.0 180 Ringing                                                              2013       39857 192.168.10.3
    -- SIP/2016-5831 is ringing
--> SIP/2.0 183 Session Progress                                                     2013       39857 192.168.10.3
<-- INFO sip:2016@192.168.10.1 SIP/2.0                                               2013       39857 192.168.10.3
--> SIP/2.0 200 OK                                                                   2013       39857 192.168.10.3
    -- SIP/2016-5831 answered SIP/2013-7600
--> SIP/2.0 200 OK                                                                   2013       39857 192.168.10.3
    -- Attempting native bridge of SIP/2013-7600 and SIP/2016-5831
--> SIP/2.0 200 OK                                                                   2013       39857 192.168.10.3
--> SIP/2.0 200 OK                                                                   2013       39857 192.168.10.3
--> SIP/2.0 200 OK                                                                   2013       39857 192.168.10.3
--> SIP/2.0 200 OK                                                                   2013       39857 192.168.10.3
<--                                                                                  2013       0     192.168.10.3
--> SIP/2.0 200 OK                                                                   2013       39857 192.168.10.3
Jan 26 04:11:36 WARNING[6151]: chan_sip.c:578 retrans_pkt: Maximum retries exceeded on call e08d962245a2871e@192.168.10.3 for seqno 39857 (Response)
  == Spawn extension (sip, 2016, 1) exited non-zero on 'SIP/2013-7600'
--> BYE sip:2013@192.168.10.3 SIP/2.0                                                2013       102   192.168.10.3
<-- SIP/2.0 481                                                                      2013       102   192.168.10.3