root@comcerto:~# tcpdump -v -s1514 port 5060 and host 10.62.40.24
tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 1514 bytes
08:48:03.593886 IP (tos 0x0, ttl 64, id 38094, offset 0, flags [DF], proto TCP (6), length 52)
    10.62.113.132.56252 > 10.62.40.24.5060: Flags [S], cksum 0x3cda (correct), seq 1524966126, win 5840, options [mss 1460,nop,nop,sackOK,nop,wscale 2], length 0
08:48:03.594621 IP (tos 0x0, ttl 61, id 58085, offset 0, flags [DF], proto TCP (6), length 40)
    10.62.40.24.5060 > 10.62.113.132.56252: Flags [R.], cksum 0x8d56 (correct), seq 548136545, ack 1524966127, win 0, length 0
08:48:08.557827 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 582)
    10.62.113.132.5060 > 10.62.40.24.5060: SIP, length: 554
        OPTIONS sip:4998@10.62.40.24 SIP/2.0
        Via: SIP/2.0/UDP 10.62.113.132:5060;branch=z9hG4bK-524287-1---7282f940c361045f;rport
        Via: SIP/2.0/UDP 10.62.4.17:5060;branch=z9hG4bK0fbce99c;rport=5060
        Max-Forwards: 69
        Contact: <sip:10.62.4.17;transport=UDP>
        To: <sip:4998@10.62.113.132>
  root@comcerto:~# tcpdump -v -s1514 port 5060 and host 10.62.40.24
tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 1514 bytes
08:48:03.593886 IP (tos 0x0, ttl 64, id 38094, offset 0, flags [DF], proto TCP (6), length 52)
    10.62.113.132.56252 > 10.62.40.24.5060: Flags [S], cksum 0x3cda (correct), seq 1524966126, win 5840, options [mss 1460,nop,nop,sackOK,nop,wscale 2], length 0
08:48:03.594621 IP (tos 0x0, ttl 61, id 58085, offset 0, flags [DF], proto TCP (6), length 40)
    10.62.40.24.5060 > 10.62.113.132.56252: Flags [R.], cksum 0x8d56 (correct), seq 548136545, ack 1524966127, win 0, length 0
08:48:08.557827 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 582)
    10.62.113.132.5060 > 10.62.40.24.5060: SIP, length: 554
        OPTIONS sip:4998@10.62.40.24 SIP/2.0
        Via: SIP/2.0/UDP 10.62.113.132:5060;branch=z9hG4bK-524287-1---7282f940c361045f;rport
        Via: SIP/2.0/UDP 10.62.4.17:5060;branch=z9hG4bK0fbce99c;rport=5060
        Max-Forwards: 69
        Contact: <sip:10.62.4.17;transport=UDP>
        To: <sip:4998@10.62.113.132>
        From: "pbx"<sip:4998@10.62.4.17>;tag=as080e87a
        Call-ID: 28577cac5775fa687d4b052f0da83c15@10.62.4.17
        CSeq: 102 OPTIONS
        Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY
        Date: Thu, 26 Sep 2024 08:58:08 GMT
        User-Agent: VINTEO 2.0.0
        Content-Length: 0

08:48:08.561675 IP (tos 0x0, ttl 61, id 13077, offset 0, flags [DF], proto UDP (17), length 689)
    10.62.40.24.5060 > 10.62.113.132.5060: SIP, length: 661
        SIP/2.0 200 OK
        Via: SIP/2.0/UDP 10.62.113.132:5060;branch=z9hG4bK-524287-1---7282f940c361045f;received=10.62.113.132;rport=5060
        Via: SIP/2.0/UDP 10.62.4.17:5060;branch=z9hG4bK0fbce99c;rport=5060
        From: "pbx"<sip:4998@10.62.4.17>;tag=as080e87a
        To: <sip:4998@10.62.113.132>
        Call-ID: 28577cac5775fa687d4b052f0da83c15@10.62.4.17
        CSeq: 102 OPTIONS
        Supported: 100rel, replaces
        Allow: INVITE, ACK, BYE, CANCEL, PRACK, REGISTER, INFO, REFER, NOTIFY, OPTIONS, UPDATE
        Content-Type: application/sdp
        User-Agent: smg_pa_sip 3.22.3.8
        Content-Length: 108

        v=0
        o=- 1 1 IN IP4 10.62.40.24
        s=SMG SIP session
        c=IN IP4 10.62.40.24
        t=0 0
        m=audio 0 RTP/AVP 8 0 101
08:48:29.247833 IP (tos 0x0, ttl 61, id 22179, offset 0, flags [DF], proto UDP (17), length 354)
    10.62.40.24.5060 > 10.62.113.132.5060: SIP, length: 326
        OPTIONS sip:10.62.113.132:5060 SIP/2.0
        Via: SIP/2.0/UDP 10.62.40.24:5060;branch=z9hG4bK-u-3-3-777-820704
        Max-Forwards: 70
        To: <sip:10.62.113.132>
        From: <sip:t3@10.62.40.24>;tag=3-3
        Call-ID: 3-3-777-3-3
        CSeq: 299303 OPTIONS
        Contact: <sip:10.62.40.24:5060>
        Accept: multipart/mixed, application/SDP
        Content-Length: 0

08:48:29.257108 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 285)
    10.62.113.132.5060 > 10.62.40.24.5060: SIP, length: 257
        SIP/2.0 200 OK
        Via: SIP/2.0/UDP 10.62.40.24:5060;branch=z9hG4bK-u-3-3-777-820704
        Contact: <sip:10.62.113.132:5060>
        To: <sip:10.62.113.132>;tag=c403c476
        From: <sip:t3@10.62.40.24>;tag=3-3
        Call-ID: 3-3-777-3-3
        CSeq: 299303 OPTIONS
        Content-Length: 0

08:48:52.542960 IP (tos 0x0, ttl 61, id 39899, offset 0, flags [DF], proto UDP (17), length 387)
    10.62.40.24.5060 > 10.62.113.132.5060: SIP, length: 359
        OPTIONS sip:4920@10.62.113.132:5060 SIP/2.0
        Via: SIP/2.0/UDP 10.62.40.24:5060;branch=z9hG4bK-u-1-402-1718644525060-116626
        Max-Forwards: 70
        To: <sip:4920@10.62.40.24>
        From: <sip:u402@10.62.40.24>;tag=1-402
        Call-ID: 1-402-1718644525060-1-402
        CSeq: 7 OPTIONS
        Contact: <sip:10.62.40.24:5060>
        Accept: multipart/mixed, application/SDP
        Content-Length: 0

08:48:52.559153 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 471)
    10.62.113.132.5060 > 10.62.40.24.5060: SIP, length: 443
        OPTIONS sip:4920@10.62.40.24:5060 SIP/2.0
        Via: SIP/2.0/UDP 10.62.113.132:5060;branch=z9hG4bK-524287-1---ff4088451848fc30;rport
        Via: SIP/2.0/UDP 10.62.40.24:5060;branch=z9hG4bK-u-1-402-1718644525060-116626
        Max-Forwards: 69
        Contact: <sip:10.62.40.24:5060>
        To: <sip:4920@10.62.40.24>
        From: <sip:u402@10.62.40.24>;tag=1-402
        Call-ID: 1-402-1718644525060-1-402
        CSeq: 7 OPTIONS
        Accept: multipart/mixed, application/SDP
        Content-Length: 0

08:48:52.562996 IP (tos 0x0, ttl 61, id 39918, offset 0, flags [DF], proto UDP (17), length 670)
    10.62.40.24.5060 > 10.62.113.132.5060: SIP, length: 642
        SIP/2.0 200 OK
        Via: SIP/2.0/UDP 10.62.113.132:5060;branch=z9hG4bK-524287-1---ff4088451848fc30;received=10.62.113.132;rport=5060
        Via: SIP/2.0/UDP 10.62.40.24:5060;branch=z9hG4bK-u-1-402-1718644525060-116626
        From: <sip:u402@10.62.40.24>;tag=1-402
        To: <sip:4920@10.62.40.24>
        Call-ID: 1-402-1718644525060-1-402
        CSeq: 7 OPTIONS
        Supported: 100rel, replaces
        Allow: INVITE, ACK, BYE, CANCEL, PRACK, REGISTER, INFO, REFER, NOTIFY, OPTIONS, UPDATE
        Content-Type: application/sdp
        User-Agent: smg_pa_sip 3.22.3.8
        Content-Length: 108

        v=0
        o=- 1 1 IN IP4 10.62.40.24
        s=SMG SIP session
        c=IN IP4 10.62.40.24
        t=0 0
        m=audio 0 RTP/AVP 8 0 101
08:48:52.573026 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 578)
    10.62.113.132.5060 > 10.62.40.24.5060: SIP, length: 550
        SIP/2.0 200 OK
        Via: SIP/2.0/UDP 10.62.40.24:5060;branch=z9hG4bK-u-1-402-1718644525060-116626
        To: <sip:4920@10.62.40.24>
        From: <sip:u402@10.62.40.24>;tag=1-402
        Call-ID: 1-402-1718644525060-1-402
        CSeq: 7 OPTIONS
        Allow: INVITE, ACK, BYE, CANCEL, PRACK, REGISTER, INFO, REFER, NOTIFY, OPTIONS, UPDATE
        Content-Type: application/sdp
        Server: repro 1.12.0
        Supported: 100rel, replaces
        User-Agent: smg_pa_sip 3.22.3.8
        Content-Length: 108

        v=0
        o=- 1 1 IN IP4 10.62.40.24
        s=SMG SIP session
        c=IN IP4 10.62.40.24
        t=0 0
        m=audio 0 RTP/AVP 8 0 101
08:48:59.248021 IP (tos 0x0, ttl 61, id 40643, offset 0, flags [DF], proto UDP (17), length 354)
    10.62.40.24.5060 > 10.62.113.132.5060: SIP, length: 326
        OPTIONS sip:10.62.113.132:5060 SIP/2.0
        Via: SIP/2.0/UDP 10.62.40.24:5060;branch=z9hG4bK-u-3-3-777-821712
        Max-Forwards: 70
        To: <sip:10.62.113.132>
        From: <sip:t3@10.62.40.24>;tag=3-3
        Call-ID: 3-3-777-3-3
        CSeq: 299304 OPTIONS
        Contact: <sip:10.62.40.24:5060>
        Accept: multipart/mixed, application/SDP
        Content-Length: 0

08:48:59.258453 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 285)
    10.62.113.132.5060 > 10.62.40.24.5060: SIP, length: 257
        SIP/2.0 200 OK
        Via: SIP/2.0/UDP 10.62.40.24:5060;branch=z9hG4bK-u-3-3-777-821712
        Contact: <sip:10.62.113.132:5060>
        To: <sip:10.62.113.132>;tag=e38d2a54
        From: <sip:t3@10.62.40.24>;tag=3-3
        Call-ID: 3-3-777-3-3
        CSeq: 299304 OPTIONS
        Content-Length: 0

08:49:08.588834 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 582)
    10.62.113.132.5060 > 10.62.40.24.5060: SIP, length: 554
        OPTIONS sip:4998@10.62.40.24 SIP/2.0
        Via: SIP/2.0/UDP 10.62.113.132:5060;branch=z9hG4bK-524287-1---45b89d1b7d7ecb37;rport
        Via: SIP/2.0/UDP 10.62.4.17:5060;branch=z9hG4bK73e28180;rport=5060
        Max-Forwards: 69
        Contact: <sip:10.62.4.17;transport=UDP>
        To: <sip:4998@10.62.113.132>
        From: "pbx"<sip:4998@10.62.4.17>;tag=as7a2ae36
        Call-ID: 79c5db1f4fb025da373e0e511a70c57e@10.62.4.17
        CSeq: 102 OPTIONS
        Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY
        Date: Thu, 26 Sep 2024 08:59:08 GMT
        User-Agent: VINTEO 2.0.0
        Content-Length: 0

08:49:08.593082 IP (tos 0x0, ttl 61, id 48495, offset 0, flags [DF], proto UDP (17), length 689)
    10.62.40.24.5060 > 10.62.113.132.5060: SIP, length: 661
        SIP/2.0 200 OK
        Via: SIP/2.0/UDP 10.62.113.132:5060;branch=z9hG4bK-524287-1---45b89d1b7d7ecb37;received=10.62.113.132;rport=5060
        Via: SIP/2.0/UDP 10.62.4.17:5060;branch=z9hG4bK73e28180;rport=5060
        From: "pbx"<sip:4998@10.62.4.17>;tag=as7a2ae36
        To: <sip:4998@10.62.113.132>
        Call-ID: 79c5db1f4fb025da373e0e511a70c57e@10.62.4.17
        CSeq: 102 OPTIONS
        Supported: 100rel, replaces
        Allow: INVITE, ACK, BYE, CANCEL, PRACK, REGISTER, INFO, REFER, NOTIFY, OPTIONS, UPDATE
        Content-Type: application/sdp
        User-Agent: smg_pa_sip 3.22.3.8
        Content-Length: 108

        v=0
        o=- 1 1 IN IP4 10.62.40.24
        s=SMG SIP session
        c=IN IP4 10.62.40.24
        t=0 0
        m=audio 0 RTP/AVP 8 0 101
08:49:29.249239 IP (tos 0x0, ttl 61, id 50212, offset 0, flags [DF], proto UDP (17), length 354)
    10.62.40.24.5060 > 10.62.113.132.5060: SIP, length: 326
        OPTIONS sip:10.62.113.132:5060 SIP/2.0
        Via: SIP/2.0/UDP 10.62.40.24:5060;branch=z9hG4bK-u-3-3-777-822715
        Max-Forwards: 70
        To: <sip:10.62.113.132>
        From: <sip:t3@10.62.40.24>;tag=3-3
        Call-ID: 3-3-777-3-3
        CSeq: 299305 OPTIONS
        Contact: <sip:10.62.40.24:5060>
        Accept: multipart/mixed, application/SDP
        Content-Length: 0

08:49:29.258601 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 285)
    10.62.113.132.5060 > 10.62.40.24.5060: SIP, length: 257
        SIP/2.0 200 OK
        Via: SIP/2.0/UDP 10.62.40.24:5060;branch=z9hG4bK-u-3-3-777-822715
        Contact: <sip:10.62.113.132:5060>
        To: <sip:10.62.113.132>;tag=d660de6e
        From: <sip:t3@10.62.40.24>;tag=3-3
        Call-ID: 3-3-777-3-3
        CSeq: 299305 OPTIONS
        Content-Length: 0