Is this due to asterisk ?
SIP/bhub7-09bc3b10 is ringing
-- SIP/bhub7-09bc3b10 is making progress passing it to Local/71441274736637@default-f20c,2
-- SIP/bhub7-09bc3b10 is ringing
-- SIP/bhub7-09bc3b10 is making progress passing it to Local/71441274736637@default-f20c,2
== Manager 'sendcron' logged off from 127.0.0.1
-- SIP/bhub7-09a07c48 is making progress passing it to Local/71441296589558@default-0f60,2
-- AGI Script agi-VDAD_ALL_outbound.agi completed, returning 0
-- Executing AGI("SIP/bhub7-09b3d4a8", "agi-VDAD_ALL_outbound.agi|NORMAL-----LB") in new stack
-- Launched AGI Script /var/lib/asterisk/agi-bin/agi-VDAD_ALL_outbound.agi
== Manager 'sendcron' logged off from 127.0.0.1
== Manager 'sendcron' logged off from 127.0.0.1
Aug 14 07:46:18 WARNING[2789]: chan_sip.c:9890 handle_response_invite: Forbidden - wrong password on authentication for INVITE to '"V0814074602000003510" <sip:0000000000@119.2.60.103>;tag=as7c273db5'
-- SIP/bhub7-099a8b70 is circuit-busy
== Everyone is busy/congested at this time (1:0/1/0)
-- Executing Hangup("Local/71442086217588@default-73da,2", "") in new stack
== Spawn extension (default, 71442086217588, 3) exited non-zero on 'Local/71442086217588@default-73da,2'
-- Executing DeadAGI("Local/71442086217588@default-73da,2", "agi://127.0.0.1:4577/call_log--HVcauses--PRI-----NODEBUG-----21-----CONGESTION----------") in new stack
-- AGI Script agi://127.0.0.1:4577/call_log--HVcauses ... ---------- completed, returning 0
== Manager 'sendcron' logged off from 127.0.0.1
-- AGI Script agi-VDAD_ALL_outbound.agi completed, returning 0
-- Executing Goto("SIP/bhub7-09b3d4a8", "default|8600053|1") in new stack
-- Goto (default,8600053,1)
-- Executing MeetMe("SIP/bhub7-09b3d4a8", "8600053|F") in new stack
== Parsing '/etc/asterisk/manager.conf': Found
== Manager 'sendcron' logged on from 127.0.0.1
-- Executing AGI("Local/71441612822416@default-6cf3,2", "agi://127.0.0.1:4577/call_log") in new stack