PJSIP Endpoints unreachable

Hello everybody,

we are using FreePBX 14.0.11 in a virtual environment. Endpoints are 1 gigaset Pro N720 DECT Manager with 10 base stations and 60 handsets as well as around 10 gigaset Maxwell basic and Maxwell 3 phones. Last night, all endpoints have logged off again. What could be the cause?

[2019-08-01 01:56:23] VERBOSE[30320] pbx_variables.c: Setting global variable 'SIPDOMAIN' to 
'192.77.6.208'
[2019-08-01 01:56:23] VERBOSE[30320] netsock2.c: Using SIP RTP Audio TOS bits 184
[2019-08-01 01:56:23] VERBOSE[30320] netsock2.c: Using SIP RTP Audio TOS bits 184 in 
TCLASS field.
[2019-08-01 01:56:23] VERBOSE[30320] netsock2.c: Using SIP RTP Audio CoS mark 5
[2019-08-01 01:56:57] VERBOSE[30321] pbx_variables.c: Setting global variable 'SIPDOMAIN' to 
'192.77.6.208'
[2019-08-01 01:56:57] VERBOSE[30321] netsock2.c: Using SIP RTP Audio TOS bits 184
[2019-08-01 01:56:57] VERBOSE[30321] netsock2.c: Using SIP RTP Audio TOS bits 184 in 
TCLASS field.
[2019-08-01 01:56:57] VERBOSE[30321] netsock2.c: Using SIP RTP Audio CoS mark 5
[2019-08-01 01:57:19] VERBOSE[31758] pbx_variables.c: Setting global variable 'SIPDOMAIN' to 
'192.77.6.208'
[2019-08-01 01:57:19] VERBOSE[31758] netsock2.c: Using SIP RTP Audio TOS bits 184
[2019-08-01 01:57:19] VERBOSE[31758] netsock2.c: Using SIP RTP Audio TOS bits 184 in 
TCLASS field.
[2019-08-01 01:57:19] VERBOSE[31758] netsock2.c: Using SIP RTP Audio CoS mark 5
[2019-08-01 01:57:29] VERBOSE[17587] res_pjsip_registrar.c: Removed contact 
'sip:[email protected]:5060' from AOR '84' due to expiration
[2019-08-01 01:57:29] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
84/sip:[email protected]:5060 has been deleted
[2019-08-01 01:57:29] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 84 is now 
Unreachable
[2019-08-01 01:57:59] VERBOSE[17587] res_pjsip_registrar.c: Removed contact 
'sip:[email protected]:5060' from AOR '36' due to expiration
[2019-08-01 01:57:59] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
36/sip:[email protected]:5060 has been deleted
[2019-08-01 01:57:59] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 36 is now 
Unreachable
[2019-08-01 01:58:03] VERBOSE[4967] res_pjsip_registrar.c: Added contact 
'sip:[email protected]:5060' to AOR '84' with expiration of 180 seconds
[2019-08-01 01:58:03] VERBOSE[4967] res_pjsip/pjsip_configuration.c: Endpoint 84 is now 
Reachable
[2019-08-01 01:58:03] VERBOSE[4967] res_pjsip/pjsip_options.c: Contact 
84/sip:[email protected]:5060 is now Reachable.  RTT: 30.322 msec
[2019-08-01 01:58:23] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
71/sip:[email protected]:5060 has been deleted
[2019-08-01 01:58:23] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 71 is now 
Unreachable
[2019-08-01 01:58:23] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
82/sip:[email protected]:5060 has been deleted
[2019-08-01 01:58:23] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 82 is now 
Unreachable
[2019-08-01 01:58:23] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
91/sip:[email protected]:5060 has been deleted
[2019-08-01 01:58:23] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 91 is now 
Unreachable
[2019-08-01 01:58:29] VERBOSE[17587] res_pjsip_registrar.c: Removed contact 
'sip:[email protected]:5060' from AOR '39' due to expiration
[2019-08-01 01:58:29] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
39/sip:[email protected]:5060 has been deleted
[2019-08-01 01:58:29] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 39 is now 
Unreachable
[2019-08-01 01:58:30] VERBOSE[4967] res_pjsip_registrar.c: Added contact 
'sip:[email protected]:5060' to AOR '36' with expiration of 180 seconds
[2019-08-01 01:58:30] VERBOSE[4967] res_pjsip/pjsip_configuration.c: Endpoint 36 is now 
Reachable
[2019-08-01 01:58:30] VERBOSE[4967] res_pjsip/pjsip_options.c: Contact 
36/sip:[email protected]:5060 is now Reachable.  RTT: 30.407 msec
[2019-08-01 01:58:40] VERBOSE[4967] res_pjsip_registrar.c: Added contact 
'sip:[email protected]:5060' to AOR '71' with expiration of 180 seconds
[2019-08-01 01:58:40] VERBOSE[4967] res_pjsip/pjsip_configuration.c: Endpoint 71 is now 
Reachable
[2019-08-01 01:58:40] VERBOSE[4967] res_pjsip/pjsip_options.c: Contact 
71/sip:[email protected]:5060 is now Reachable.  RTT: 30.645 msec
[2019-08-01 01:58:46] VERBOSE[4967] res_pjsip_registrar.c: Added contact 
'sip:[email protected]:5060' to AOR '91' with expiration of 180 seconds
[2019-08-01 01:58:46] VERBOSE[4967] res_pjsip/pjsip_configuration.c: Endpoint 91 is now 
Reachable
[2019-08-01 01:58:46] VERBOSE[4967] res_pjsip/pjsip_options.c: Contact 
91/sip:[email protected]:5060 is now Reachable.  RTT: 30.493 msec
[2019-08-01 01:58:56] VERBOSE[4967] res_pjsip_registrar.c: Added contact 
'sip:[email protected]:5060' to AOR '82' with expiration of 180 seconds
[2019-08-01 01:58:56] VERBOSE[4967] res_pjsip/pjsip_configuration.c: Endpoint 82 is now 
Reachable
[2019-08-01 01:58:56] VERBOSE[4967] res_pjsip/pjsip_options.c: Contact 
82/sip:[email protected]:5060 is now Reachable.  RTT: 42.324 msec
[2019-08-01 01:58:59] VERBOSE[17587] res_pjsip_registrar.c: Removed contact 
'sip:[email protected]:5060' from AOR '21' due to expiration
[2019-08-01 01:58:59] VERBOSE[17587] res_pjsip_registrar.c: Removed contact 
'sip:[email protected]:5060' from AOR '95' due to expiration
[2019-08-01 01:58:59] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
21/sip:[email protected]:5060 has been deleted
[2019-08-01 01:58:59] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 21 is now 
Unreachable
[2019-08-01 01:58:59] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
95/sip:[email protected]:5060 has been deleted
[2019-08-01 01:58:59] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 95 is now 
Unreachable
[2019-08-01 01:59:02] VERBOSE[4967] res_pjsip_registrar.c: Added contact 
'sip:[email protected]:5060' to AOR '39' with expiration of 180 seconds
[2019-08-01 01:59:03] VERBOSE[4967] res_pjsip/pjsip_configuration.c: Endpoint 39 is now 
Reachable
[2019-08-01 01:59:03] VERBOSE[4967] res_pjsip/pjsip_options.c: Contact 
39/sip:[email protected]:5060 is now Reachable.  RTT: 44.106 msec
[2019-08-01 01:59:14] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
63/sip:[email protected]:5060 has been deleted
[2019-08-01 01:59:14] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 63 is now 
Unreachable
[2019-08-01 01:59:26] VERBOSE[4967] res_pjsip_registrar.c: Added contact             
'sip:[email protected]:5060' to AOR '21' with expiration of 180 seconds
[2019-08-01 01:59:26] VERBOSE[4967] res_pjsip/pjsip_configuration.c: Endpoint 21 is now     
Reachable
[2019-08-01 01:59:26] VERBOSE[4967] res_pjsip/pjsip_options.c: Contact 
21/sip:[email protected]:5060 is now Reachable.  RTT: 32.153 msec
[2019-08-01 01:59:36] VERBOSE[4967] res_pjsip_registrar.c: Added contact 
'sip:[email protected]:5060' to AOR '63' with expiration of 180 seconds
[2019-08-01 01:59:36] VERBOSE[4967] res_pjsip/pjsip_configuration.c: Endpoint 63 is now 
Reachable
[2019-08-01 01:59:36] VERBOSE[4967] res_pjsip/pjsip_options.c: Contact 
63/sip:[email protected]:5060 is now Reachable.  RTT: 30.526 msec
[2019-08-01 01:59:49] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
14/sip:[email protected]:5060 has been deleted
[2019-08-01 01:59:49] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 14 is now 
Unreachable
[2019-08-01 01:59:49] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
96/sip:[email protected]:5060 has been deleted
[2019-08-01 01:59:49] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 96 is now 
Unreachable
[2019-08-01 02:00:23] VERBOSE[4967] res_pjsip_registrar.c: Added contact 
'sip:[email protected]:5060' to AOR '96' with expiration of 180 seconds
[2019-08-01 02:00:23] VERBOSE[4967] res_pjsip/pjsip_configuration.c: Endpoint 96 is now 
Reachable
[2019-08-01 02:00:23] VERBOSE[4967] res_pjsip/pjsip_options.c: Contact 
96/sip:[email protected]:5060 is now Reachable.  RTT: 35.980 msec
[2019-08-01 02:00:24] VERBOSE[4967] res_pjsip_registrar.c: Added contact 
'sip:[email protected]:5060' to AOR '14' with expiration of 180 seconds
[2019-08-01 02:00:24] VERBOSE[4967] res_pjsip/pjsip_configuration.c: Endpoint 14 is now 
Reachable
[2019-08-01 02:00:24] VERBOSE[4967] res_pjsip/pjsip_options.c: Contact 
14/sip:[email protected]:5060 is now Reachable.  RTT: 48.871 msec
[2019-08-01 02:00:25] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
48/sip:[email protected]:5060 has been deleted
[2019-08-01 02:00:25] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 48 is now 
Unreachable
[2019-08-01 02:00:29] VERBOSE[17587] res_pjsip_registrar.c: Removed contact 
'sip:[email protected]:5060' from AOR '11' due to expiration
[2019-08-01 02:00:29] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
11/sip:[email protected]:5060 has been deleted
[2019-08-01 02:00:29] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 11 is now 
Unreachable
[2019-08-01 02:00:47] VERBOSE[4967] res_pjsip_registrar.c: Added contact 
'sip:[email protected]:5060' to AOR '48' with expiration of 180 seconds
[2019-08-01 02:00:47] VERBOSE[4967] res_pjsip/pjsip_configuration.c: Endpoint 48 is now 
Reachable
[2019-08-01 02:00:47] VERBOSE[4967] res_pjsip/pjsip_options.c: Contact 
48/sip:[email protected]:5060 is now Reachable.  RTT: 30.408 msec
[2019-08-01 02:00:57] VERBOSE[4967] res_pjsip_registrar.c: Added contact 
'sip:[email protected]:5060' to AOR '95' with expiration of 180 seconds
[2019-08-01 02:00:57] VERBOSE[4967] res_pjsip/pjsip_configuration.c: Endpoint 95 is now 
Reachable
[2019-08-01 02:00:57] VERBOSE[4967] res_pjsip/pjsip_options.c: Contact 
95/sip:[email protected]:5060 is now Reachable.  RTT: 30.583 msec
[2019-08-01 02:00:59] VERBOSE[17587] res_pjsip_registrar.c: Removed contact 
'sip:[email protected]:5060' from AOR '98' due to expiration
[2019-08-01 02:00:59] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
98/sip:[email protected]:5060 has been deleted
[2019-08-01 02:00:59] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 98 is now 
Unreachable
[2019-08-01 02:02:29] VERBOSE[17587] res_pjsip_registrar.c: Removed contact 
'sip:[email protected]:5060' from AOR '40' due to expiration
[2019-08-01 02:02:29] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
40/sip:[email protected]:5060 has been deleted
[2019-08-01 02:02:29] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 40 is now 
Unreachable
[2019-08-01 02:02:47] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
47/sip:[email protected]:5060 has been deleted
[2019-08-01 02:02:47] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 47 is now 
Unreachable
[2019-08-01 02:02:47] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
63/sip:[email protected]:5060 has been deleted
[2019-08-01 02:02:47] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 63 is now 
Unreachable
[2019-08-01 02:03:02] VERBOSE[4967] res_pjsip_registrar.c: Added contact 
'sip:[email protected]:5060' to AOR '40' with expiration of 180 seconds
[2019-08-01 02:03:02] VERBOSE[4967] res_pjsip/pjsip_configuration.c: Endpoint 40 is now 
Reachable
[2019-08-01 02:03:02] VERBOSE[4967] res_pjsip/pjsip_options.c: Contact 
40/sip:[email protected]:5060 is now Reachable.  RTT: 31.921 msec
[2019-08-01 02:03:12] VERBOSE[4967] res_pjsip_registrar.c: Added contact 
'sip:[email protected]:5060' to AOR '63' with expiration of 180 seconds
[2019-08-01 02:03:12] VERBOSE[4967] res_pjsip/pjsip_configuration.c: Endpoint 63 is now 
Reachable
[2019-08-01 02:03:12] VERBOSE[4967] res_pjsip/pjsip_options.c: Contact 
63/sip:[email protected]:5060 is now Reachable.  RTT: 32.296 msec
[2019-08-01 02:03:13] VERBOSE[4967] res_pjsip_registrar.c: Added contact 
'sip:[email protected]:5060' to AOR '47' with expiration of 180 seconds
[2019-08-01 02:03:13] VERBOSE[4967] res_pjsip/pjsip_configuration.c: Endpoint 47 is now 
Reachable
[2019-08-01 02:03:13] VERBOSE[4967] res_pjsip/pjsip_options.c: Contact 
47/sip:[email protected]:5060 is now Reachable.  RTT: 31.903 msec
[2019-08-01 02:03:22] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
70/sip:[email protected]:5060 has been deleted
[2019-08-01 02:03:22] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 70 is now 
Unreachable
[2019-08-01 02:03:29] VERBOSE[17587] res_pjsip_registrar.c: Removed contact 
'sip:[email protected]:5060' from AOR '34' due to expiration
[2019-08-01 02:03:29] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
34/sip:[email protected]:5060 has been deleted
[2019-08-01 02:03:41] VERBOSE[4967] res_pjsip_registrar.c: Added contact 
'sip:[email protected]:5060' to AOR '70' with expiration of 180 seconds
[2019-08-01 02:03:41] VERBOSE[4967] res_pjsip/pjsip_configuration.c: Endpoint 70 is now 
Reachable
[2019-08-01 02:03:41] VERBOSE[4967] res_pjsip/pjsip_options.c: Contact 
70/sip:[email protected]:5060 is now Reachable.  RTT: 29.907 msec
[2019-08-01 02:03:58] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
77/sip:[email protected]:5060 has been deleted
[2019-08-01 02:03:58] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 77 is now 
Unreachable
[2019-08-01 02:03:58] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
20/sip:[email protected]:5060 has been deleted
[2019-08-01 02:03:58] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 20 is now 
Unreachable
[2019-08-01 02:04:00] VERBOSE[4967] res_pjsip_registrar.c: Added contact 
'sip:[email protected]:5060' to AOR '34' with expiration of 180 seconds
[2019-08-01 02:04:01] VERBOSE[4967] res_pjsip/pjsip_options.c: Contact 
34/sip:[email protected]:5060 is now Reachable.  RTT: 21.017 msec
[2019-08-01 02:04:06] VERBOSE[4967] res_pjsip_registrar.c: Added contact 
'sip:[email protected]:5060' to AOR '77' with expiration of 180 seconds
[2019-08-01 02:04:06] VERBOSE[4967] res_pjsip/pjsip_configuration.c: Endpoint 77 is now 
Reachable
[2019-08-01 02:04:06] VERBOSE[4967] res_pjsip/pjsip_options.c: Contact 
77/sip:[email protected]:5060 is now Reachable.  RTT: 42.057 msec
[2019-08-01 02:04:28] VERBOSE[4967] res_pjsip_registrar.c: Added contact 
'sip:[email protected]:5060' to AOR '11' with expiration of 180 seconds
[2019-08-01 02:04:28] VERBOSE[4967] res_pjsip/pjsip_configuration.c: Endpoint 11 is now 
Reachable
[2019-08-01 02:04:28] VERBOSE[4967] res_pjsip/pjsip_options.c: Contact 
11/sip:[email protected]:5060 is now Reachable.  RTT: 512.184 msec
[2019-08-01 02:04:29] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
97/sip:[email protected]:5060 has been deleted
[2019-08-01 02:04:29] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 97 is now 
Unreachable
[2019-08-01 02:04:30] VERBOSE[4967] res_pjsip_registrar.c: Added contact 
'sip:[email protected]:5060' to AOR '20' with expiration of 180 seconds
[2019-08-01 02:04:30] VERBOSE[4967] res_pjsip/pjsip_configuration.c: Endpoint 20 is now 
Reachable
[2019-08-01 02:04:30] VERBOSE[4967] res_pjsip/pjsip_options.c: Contact 
20/sip:[email protected]:5060 is now Reachable.  RTT: 30.403 msec
[2019-08-01 02:04:59] VERBOSE[17587] res_pjsip_registrar.c: Removed contact 
'sip:[email protected]:5060' from AOR '18' due to expiration
[2019-08-01 02:04:59] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
18/sip:[email protected]:5060 has been deleted
[2019-08-01 02:04:59] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 18 is now 
Unreachable
[2019-08-01 02:05:03] WARNING[17452] taskprocessor.c: The 'pjsip/distributor-00000086' task 
processor queue reached 500 scheduled tasks.
[2019-08-01 02:05:29] VERBOSE[17587] res_pjsip_registrar.c: Removed contact 
'sip:[email protected]:5060' from AOR '28' due to expiration
[2019-08-01 02:05:29] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
28/sip:[email protected]:5060 has been deleted
[2019-08-01 02:05:29] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 28 is now 
Unreachable
[2019-08-01 02:05:44] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
42/sip:[email protected]:5060 has been deleted
[2019-08-01 02:05:44] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 42 is now 
Unreachable
[2019-08-01 02:05:59] VERBOSE[17587] res_pjsip_registrar.c: Removed contact 
'sip:[email protected]:5060' from AOR '12' due to expiration
[2019-08-01 02:05:59] VERBOSE[17587] res_pjsip_registrar.c: Removed contact 
'sip:[email protected]:5060' from AOR '32' due to expiration
[2019-08-01 02:05:59] VERBOSE[17587] res_pjsip_registrar.c: Removed contact 
'sip:[email protected]:5060' from AOR '56' due to expiration
[2019-08-01 02:05:59] VERBOSE[17587] res_pjsip_registrar.c: Removed contact 
'sip:[email protected]:5060' from AOR '75' due to expiration
[2019-08-01 02:05:59] VERBOSE[17587] res_pjsip_registrar.c: Removed contact 
'sip:[email protected]:5060' from AOR '92' due to expiration
[2019-08-01 02:05:59] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
12/sip:[email protected]:5060 has been deleted
[2019-08-01 02:05:59] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 12 is now 
Unreachable
[2019-08-01 02:05:59] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
32/sip:[email protected]:5060 has been deleted
[2019-08-01 02:05:59] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 32 is now 
Unreachable
[2019-08-01 02:05:59] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
56/sip:[email protected]:5060 has been deleted
[2019-08-01 02:05:59] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 56 is now 
Unreachable
[2019-08-01 02:05:59] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
75/sip:[email protected]:5060 has been deleted
[2019-08-01 02:05:59] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 75 is now 
Unreachable
[2019-08-01 02:05:59] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
92/sip:[email protected]:5060 has been deleted
[2019-08-01 02:05:59] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 92 is now 
Unreachable
[2019-08-01 02:06:20] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
40/sip:[email protected]:5060 has been deleted
[2019-08-01 02:06:20] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 40 is now 
Unreachable
[2019-08-01 02:06:20] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
36/sip:[email protected]:5060 has been deleted
[2019-08-01 02:06:20] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 36 is now 
Unreachable
[2019-08-01 02:06:20] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
47/sip:[email protected]:5060 has been deleted
[2019-08-01 02:06:20] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 47 is now 
Unreachable
[2019-08-01 02:06:20] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
48/sip:[email protected]:5060 has been deleted
[2019-08-01 02:06:20] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 48 is now 
Unreachable
[2019-08-01 02:06:20] VERBOSE[5139] res_pjsip/pjsip_options.c: Contact 
811/sip:[email protected]:5060 has been deleted
[2019-08-01 02:06:20] VERBOSE[5139] res_pjsip/pjsip_configuration.c: Endpoint 811 is now 
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