[Spce-user] SIP Calls Failure with timeout on mr13.5.1LTS - Works on mr8.5.1

Tue Dec 23 12:21:35 EST 2025

- Routing continues to fail in mr13.5.1, even after an upgrade.
- When testing from mr9.4.1 onwards, the signaling only works in one
direction, as originally indicated.
-* It is important to note that this same test scenario works flawlessly on
an older version, e.g mr8.5.2*
- The specific problem manifests in calls going from the neth2 interface to
the neth3 interface.
- As requested, I am attaching a "SIP trace" and "kamailio-proxy log".

I have configured the network interfaces as follows:
neth1: type=sip_ext and rtp_ext (To connect to a peering in the future)
Subnet: 172.100.100.0/29
neth2: type=sip_ext_incoming
Subnet: 172.16.0.0/16
neth3: type=sip_ext_incoming Public IP

I am very grateful for your help in determining the problem mentioned.
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2025/12/23 12:12:50.482585 172.16.100.209:5060 -> 172.16.200.100:5060
INVITE sip:51187654321 at ss.example.org:5060 SIP/2.0
Via: SIP/2.0/UDP 172.16.100.209:5060;rport;branch=z9hG4bKPjFs2s4pPg7uqq1MOnKVLAuDB1MzTTAWwg
Max-Forwards: 70
From: <sip:alice at ss.example.org>;tag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW
To: <sip:51187654321 at ss.example.org>
Contact: <sip:alice at 172.16.100.209:5060>
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm
CSeq: 13039 INVITE
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, SUBSCRIBE, NOTIFY, REFER, OPTIONS
Supported: replaces, 100rel, timer, norefersub
Session-Expires: 1800
Min-SE: 90
User-Agent: uagv1
Content-Type: application/sdp
Content-Length:   381

v=0
o=- 3975491569 3975491569 IN IP4 172.16.100.209
s=pjmedia
c=IN IP4 172.16.100.209
t=0 0
m=audio 60424 RTP/AVP 0 8 2 110 18 9 96
a=rtcp:60425 IN IP4 172.16.100.209
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:2 G726-32/8000
a=rtpmap:110 G726-32/8000
a=rtpmap:18 G729/8000
a=rtpmap:9 G722/16000
a=sendrecv
a=ptime:20
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-15


2025/12/23 12:12:50.483329 172.16.200.100:5060 -> 172.16.100.209:5060
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 172.16.100.209:5060;rport=5060;received=172.16.100.209;branch=z9hG4bKPjFs2s4pPg7uqq1MOnKVLAuDB1MzTTAWwg
From: <sip:alice at ss.example.org>;tag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW
To: <sip:51187654321 at ss.example.org>
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm
CSeq: 13039 INVITE
Server: Sipwise NGCP LB mr13.5.1
Content-Length: 0


2025/12/23 12:12:50.483441 127.0.0.1:5060 -> 127.0.0.1:5062
INVITE sip:51187654321 at ss.example.org:5060 SIP/2.0
Record-Route: <sip:127.0.0.1;r2=on;lr=on;ftag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW;ngcplb=yes;nat=yes;socket=udp:172.16.200.100:5060>
Record-Route: <sip:172.16.200.100;r2=on;lr=on;ftag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW;ngcplb=yes;nat=yes;socket=udp:172.16.200.100:5060>
Via: SIP/2.0/UDP 127.0.0.1;branch=z9hG4bK9879.24264cf6833c5ff4b82a803dd594fcee.0
Via: SIP/2.0/UDP 172.16.100.209:5060;received=172.16.100.209;rport=5060;branch=z9hG4bKPjFs2s4pPg7uqq1MOnKVLAuDB1MzTTAWwg
Max-Forwards: 69
From: <sip:alice at ss.example.org>;tag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW
To: <sip:51187654321 at ss.example.org>
Contact: <sip:alice at 172.16.100.209:5060;alias=172.16.100.209~5060~1>
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm
CSeq: 13039 INVITE
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, SUBSCRIBE, NOTIFY, OPTIONS
Supported: replaces, 100rel, timer, norefersub
Session-Expires: 1800
Min-SE: 90
User-Agent: uagv1
Content-Type: application/sdp
Content-Length:   381
P-NGCP-Src-Ip: 172.16.100.209
P-NGCP-Src-Port: 5060
P-NGCP-Src-Proto: udp
P-NGCP-Src-Af: 4
P-Sock-Info: udp:172.16.200.100:5060
P-LB-Uptime: 1608
P-NGCP-Src-Nat: 1

v=0
o=- 3975491569 3975491569 IN IP4 172.16.100.209
s=pjmedia
c=IN IP4 172.16.100.209
t=0 0
m=audio 60424 RTP/AVP 0 8 2 110 18 9 96
a=rtcp:60425 IN IP4 172.16.100.209
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:2 G726-32/8000
a=rtpmap:110 G726-32/8000
a=rtpmap:18 G729/8000
a=rtpmap:9 G722/16000
a=sendrecv
a=ptime:20
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-15


2025/12/23 12:12:50.483718 127.0.0.1:5062 -> 127.0.0.1:5060
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 127.0.0.1;branch=z9hG4bK9879.24264cf6833c5ff4b82a803dd594fcee.0
Via: SIP/2.0/UDP 172.16.100.209:5060;received=172.16.100.209;rport=5060;branch=z9hG4bKPjFs2s4pPg7uqq1MOnKVLAuDB1MzTTAWwg
From: <sip:alice at ss.example.org>;tag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW
To: <sip:51187654321 at ss.example.org>
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm
CSeq: 13039 INVITE
P-Out-Socket: udp:172.16.200.100:5060
P-NGCP-Auth-IP: 172.16.100.209
P-NGCP-Auth-UA: uagv1
Server: Sipwise NGCP Proxy mr13.5.1
Content-Length: 0


2025/12/23 12:12:50.486219 127.0.0.1:5062 -> 127.0.0.1:5060
SIP/2.0 407 Proxy Authentication Required
Via: SIP/2.0/UDP 127.0.0.1;branch=z9hG4bK9879.24264cf6833c5ff4b82a803dd594fcee.0
Via: SIP/2.0/UDP 172.16.100.209:5060;received=172.16.100.209;rport=5060;branch=z9hG4bKPjFs2s4pPg7uqq1MOnKVLAuDB1MzTTAWwg
From: <sip:alice at ss.example.org>;tag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW
To: <sip:51187654321 at ss.example.org>;tag=95c37a12bff1a2c36d72bf8333176544.78550000
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm
CSeq: 13039 INVITE
P-Out-Socket: udp:172.16.200.100:5060
P-NGCP-Auth-IP: 172.16.100.209
P-NGCP-Auth-UA: uagv1
Proxy-Authenticate: Digest realm="ss.example.org", nonce="bVqynmlKsXJiJuSrbMYpH2zcpUJ0s521", algorithm=MD5
Server: Sipwise NGCP Proxy mr13.5.1
Content-Length: 0


2025/12/23 12:12:50.486326 127.0.0.1:5060 -> 127.0.0.1:5062
ACK sip:51187654321 at ss.example.org:5060 SIP/2.0
Via: SIP/2.0/UDP 127.0.0.1;branch=z9hG4bK9879.24264cf6833c5ff4b82a803dd594fcee.0
Max-Forwards: 69
From: <sip:alice at ss.example.org>;tag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW
To: <sip:51187654321 at ss.example.org>;tag=95c37a12bff1a2c36d72bf8333176544.78550000
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm
CSeq: 13039 ACK
Content-Length: 0


2025/12/23 12:12:50.486451 172.16.200.100:5060 -> 172.16.100.209:5060
SIP/2.0 407 Proxy Authentication Required
Via: SIP/2.0/UDP 172.16.100.209:5060;received=172.16.100.209;rport=5060;branch=z9hG4bKPjFs2s4pPg7uqq1MOnKVLAuDB1MzTTAWwg
From: <sip:alice at ss.example.org>;tag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW
To: <sip:51187654321 at ss.example.org>;tag=95c37a12bff1a2c36d72bf8333176544.78550000
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm
CSeq: 13039 INVITE
Proxy-Authenticate: Digest realm="ss.example.org", nonce="bVqynmlKsXJiJuSrbMYpH2zcpUJ0s521", algorithm=MD5
Server: Sipwise NGCP Proxy mr13.5.1
Content-Length: 0


2025/12/23 12:12:50.488980 172.16.100.209:5060 -> 172.16.200.100:5060
ACK sip:51187654321 at ss.example.org:5060 SIP/2.0
Via: SIP/2.0/UDP 172.16.100.209:5060;rport;branch=z9hG4bKPjFs2s4pPg7uqq1MOnKVLAuDB1MzTTAWwg
Max-Forwards: 70
From: <sip:alice at ss.example.org>;tag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW
To: <sip:51187654321 at ss.example.org>;tag=95c37a12bff1a2c36d72bf8333176544.78550000
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm
CSeq: 13039 ACK
Content-Length:  0


2025/12/23 12:12:50.490373 172.16.100.209:5060 -> 172.16.200.100:5060
INVITE sip:51187654321 at ss.example.org:5060 SIP/2.0
Via: SIP/2.0/UDP 172.16.100.209:5060;rport;branch=z9hG4bKPjLNPa1QtMkA0BFLAAbk2YVw1J3CoYCCxd
Max-Forwards: 70
From: <sip:alice at ss.example.org>;tag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW
To: <sip:51187654321 at ss.example.org>
Contact: <sip:alice at 172.16.100.209:5060>
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm
CSeq: 13040 INVITE
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, SUBSCRIBE, NOTIFY, REFER, OPTIONS
Supported: replaces, 100rel, timer, norefersub
Session-Expires: 1800
Min-SE: 90
User-Agent: uagv1
Proxy-Authorization: Digest username="alice", realm="ss.example.org", nonce="bVqynmlKsXJiJuSrbMYpH2zcpUJ0s521", uri="sip:51187654321 at ss.example.org:5060", response="4a9e3801b1d92206cef4079d75f5f3a2", algorithm=MD5
Content-Type: application/sdp
Content-Length:   381

v=0
o=- 3975491569 3975491569 IN IP4 172.16.100.209
s=pjmedia
c=IN IP4 172.16.100.209
t=0 0
m=audio 60424 RTP/AVP 0 8 2 110 18 9 96
a=rtcp:60425 IN IP4 172.16.100.209
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:2 G726-32/8000
a=rtpmap:110 G726-32/8000
a=rtpmap:18 G729/8000
a=rtpmap:9 G722/16000
a=sendrecv
a=ptime:20
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-15


2025/12/23 12:12:50.490795 172.16.200.100:5060 -> 172.16.100.209:5060
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 172.16.100.209:5060;rport=5060;received=172.16.100.209;branch=z9hG4bKPjLNPa1QtMkA0BFLAAbk2YVw1J3CoYCCxd
From: <sip:alice at ss.example.org>;tag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW
To: <sip:51187654321 at ss.example.org>
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm
CSeq: 13040 INVITE
Server: Sipwise NGCP LB mr13.5.1
Content-Length: 0


2025/12/23 12:12:50.490892 127.0.0.1:5060 -> 127.0.0.1:5062
INVITE sip:51187654321 at ss.example.org:5060 SIP/2.0
Record-Route: <sip:127.0.0.1;r2=on;lr=on;ftag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW;ngcplb=yes;nat=yes;socket=udp:172.16.200.100:5060>
Record-Route: <sip:172.16.200.100;r2=on;lr=on;ftag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW;ngcplb=yes;nat=yes;socket=udp:172.16.200.100:5060>
Via: SIP/2.0/UDP 127.0.0.1;branch=z9hG4bKe779.0f1a88ca8a15e6864ead4246d174fe01.0
Via: SIP/2.0/UDP 172.16.100.209:5060;received=172.16.100.209;rport=5060;branch=z9hG4bKPjLNPa1QtMkA0BFLAAbk2YVw1J3CoYCCxd
Max-Forwards: 69
From: <sip:alice at ss.example.org>;tag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW
To: <sip:51187654321 at ss.example.org>
Contact: <sip:alice at 172.16.100.209:5060;alias=172.16.100.209~5060~1>
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm
CSeq: 13040 INVITE
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, SUBSCRIBE, NOTIFY, OPTIONS
Supported: replaces, 100rel, timer, norefersub
Session-Expires: 1800
Min-SE: 90
User-Agent: uagv1
Proxy-Authorization: Digest username="alice", realm="ss.example.org", nonce="bVqynmlKsXJiJuSrbMYpH2zcpUJ0s521", uri="sip:51187654321 at ss.example.org:5060", response="4a9e3801b1d92206cef4079d75f5f3a2", algorithm=MD5
Content-Type: application/sdp
Content-Length:   381
P-NGCP-Src-Ip: 172.16.100.209
P-NGCP-Src-Port: 5060
P-NGCP-Src-Proto: udp
P-NGCP-Src-Af: 4
P-Sock-Info: udp:172.16.200.100:5060
P-LB-Uptime: 1608
P-NGCP-Src-Nat: 1

v=0
o=- 3975491569 3975491569 IN IP4 172.16.100.209
s=pjmedia
c=IN IP4 172.16.100.209
t=0 0
m=audio 60424 RTP/AVP 0 8 2 110 18 9 96
a=rtcp:60425 IN IP4 172.16.100.209
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:2 G726-32/8000
a=rtpmap:110 G726-32/8000
a=rtpmap:18 G729/8000
a=rtpmap:9 G722/16000
a=sendrecv
a=ptime:20
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-15


2025/12/23 12:12:50.491166 127.0.0.1:5062 -> 127.0.0.1:5060
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 127.0.0.1;branch=z9hG4bKe779.0f1a88ca8a15e6864ead4246d174fe01.0
Via: SIP/2.0/UDP 172.16.100.209:5060;received=172.16.100.209;rport=5060;branch=z9hG4bKPjLNPa1QtMkA0BFLAAbk2YVw1J3CoYCCxd
From: <sip:alice at ss.example.org>;tag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW
To: <sip:51187654321 at ss.example.org>
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm
CSeq: 13040 INVITE
P-Out-Socket: udp:172.16.200.100:5060
P-NGCP-Auth-IP: 172.16.100.209
P-NGCP-Auth-UA: uagv1
Server: Sipwise NGCP Proxy mr13.5.1
Content-Length: 0


2025/12/23 12:12:50.493355 127.0.0.1:5062 -> 127.0.0.1:5060
SIP/2.0 101 Connecting
Via: SIP/2.0/UDP 127.0.0.1;branch=z9hG4bKe779.0f1a88ca8a15e6864ead4246d174fe01.0
Via: SIP/2.0/UDP 172.16.100.209:5060;received=172.16.100.209;rport=5060;branch=z9hG4bKPjLNPa1QtMkA0BFLAAbk2YVw1J3CoYCCxd
From: <sip:alice at ss.example.org>;tag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW
To: <sip:51187654321 at ss.example.org>
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm
CSeq: 13040 INVITE
P-Out-Socket: udp:172.16.200.100:5060
P-NGCP-Auth-IP: 172.16.100.209
P-NGCP-Auth-UA: uagv1
P-NGCP-Authorization: alice at ss.example.org
P-NGCP-Authorized: 1
P-NGCP-Caller-Info: <sip:alice at ss.example.org>;ip=172.16.100.209;port=5060;primary=51123456789
P-Caller-UUID: dd4fdcd3-f688-4fd9-abc3-345649c967a5
Server: Sipwise NGCP Proxy mr13.5.1
Content-Length: 0


2025/12/23 12:12:50.516606 127.0.0.1:5062 -> 127.0.0.1:5080
INVITE sip:bob-NcLgBHqkpNe6F41 at 192.168.1.101:51759 SIP/2.0
Record-Route: <sip:127.0.0.1:5062;lr=on;ftag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW;did=357.da82;ice_caller=strip;ice_callee=strip;aset=50;rtpprx=yes;vsf=Y2FmUhIuLwNoQXBsAxAmKzUmJHY8JC1CVmYmdWxPd2pnOVcJNw-->
Record-Route: <sip:127.0.0.1;r2=on;lr=on;ftag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW;ngcplb=yes;nat=yes;socket=udp:172.16.200.100:5060>
Record-Route: <sip:172.16.200.100;r2=on;lr=on;ftag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW;ngcplb=yes;nat=yes;socket=udp:172.16.200.100:5060>
Via: SIP/2.0/UDP 127.0.0.1:5062;branch=z9hG4bKe779.1f34854ebc81903cda767aa00b4a436c.0
Route: <sip:lb at 127.0.0.1;lr;received=sip:187.34.45.65:51759;socket=sip:138.99.96.64:5060>
Via: SIP/2.0/UDP 127.0.0.1;branch=z9hG4bKe779.0f1a88ca8a15e6864ead4246d174fe01.0
Via: SIP/2.0/UDP 172.16.100.209:5060;received=172.16.100.209;rport=5060;branch=z9hG4bKPjLNPa1QtMkA0BFLAAbk2YVw1J3CoYCCxd
Max-Forwards: 68
From: <sip:51123456789 at ss.example.org>;tag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW
To: <sip:51187654321 at ss.example.org>
Contact: <sip:alice at 172.16.100.209:5060;alias=172.16.100.209~5060~1>
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm
CSeq: 13040 INVITE
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, SUBSCRIBE, NOTIFY, OPTIONS
Supported: replaces, 100rel, norefersub
Min-SE: 90
Content-Type: application/sdp
Content-Length:   360
P-LB-Uptime: 1608
P-Asserted-Identity: <sip:51123456789 at ss.example.org>
P-Caller-UUID: dd4fdcd3-f688-4fd9-abc3-345649c967a5
P-Callee-UUID: cdf7da76-445f-4524-9282-e52c7da2beca
P-Called-Party-ID: <sip:bob-NcLgBHqkpNe6F41 at ss.example.org>
P-NGCP-Leg-A-Info: OUtwa2VyMjU4blhPb2UzemV2UHlrT29Ud0tlV1J0bG0gc3NpUzNUd2Y4TWpDQzNTSjIyS3d3Vk40NkIuRFBoQ1c=
P-App-Param: ;calltimer=21600;aleg_sst_enable=no;sst_enable=no;hold_alter_b2b_bleg=no;hold_alter_b2b_aleg=no;a_park_domain=2;b_park_domain=2
P-App-Name: sbc
P-NGCP-Caller-Info: <sip:alice at ss.example.org>;ip=172.16.100.209;port=5060;primary=51123456789
P-NGCP-Callee-Info: <sip:51187654321 at ss.example.org>;ip=187.34.45.65;port=51759;primary=51187654321
P-D-Uri: sip:lb at 127.0.0.1;lr;received=sip:187.34.45.65:51759;socket=sip:138.99.96.64:5060
P-Proxy-Uri: sip:127.0.0.1:5062

v=0
o=- 3975491569 3975491569 IN IP4 172.100.100.4
s=pjmedia
t=0 0
m=audio 39840 RTP/AVP 0 8 2 110 18 9 96
c=IN IP4 172.100.100.4
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:2 G726-32/8000
a=rtpmap:110 G726-32/8000
a=rtpmap:18 G729/8000
a=rtpmap:9 G722/16000
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-15
a=sendrecv
a=rtcp:39841
a=ptime:20


2025/12/23 12:12:50.516945 127.0.0.1:5080 -> 127.0.0.1:5062
SIP/2.0 100 Connecting
Record-Route: <sip:127.0.0.1:5062;lr=on;ftag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW;did=357.da82;ice_caller=strip;ice_callee=strip;aset=50;rtpprx=yes;vsf=Y2FmUhIuLwNoQXBsAxAmKzUmJHY8JC1CVmYmdWxPd2pnOVcJNw-->
Record-Route: <sip:127.0.0.1;r2=on;lr=on;ftag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW;ngcplb=yes;nat=yes;socket=udp:172.16.200.100:5060>
Record-Route: <sip:172.16.200.100;r2=on;lr=on;ftag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW;ngcplb=yes;nat=yes;socket=udp:172.16.200.100:5060>
Via: SIP/2.0/UDP 127.0.0.1:5062;branch=z9hG4bKe779.1f34854ebc81903cda767aa00b4a436c.0
Via: SIP/2.0/UDP 127.0.0.1;branch=z9hG4bKe779.0f1a88ca8a15e6864ead4246d174fe01.0
Via: SIP/2.0/UDP 172.16.100.209:5060;received=172.16.100.209;rport=5060;branch=z9hG4bKPjLNPa1QtMkA0BFLAAbk2YVw1J3CoYCCxd
From: <sip:51123456789 at ss.example.org>;tag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW
To: <sip:51187654321 at ss.example.org>
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm
CSeq: 13040 INVITE
Content-Length: 0


2025/12/23 12:13:20.478033 127.0.0.1:5080 -> 127.0.0.1:5062
SIP/2.0 408 Request Timeout
Record-Route: <sip:127.0.0.1:5062;lr=on;ftag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW;did=357.da82;ice_caller=strip;ice_callee=strip;aset=50;rtpprx=yes;vsf=Y2FmUhIuLwNoQXBsAxAmKzUmJHY8JC1CVmYmdWxPd2pnOVcJNw-->
Record-Route: <sip:127.0.0.1;r2=on;lr=on;ftag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW;ngcplb=yes;nat=yes;socket=udp:172.16.200.100:5060>
Record-Route: <sip:172.16.200.100;r2=on;lr=on;ftag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW;ngcplb=yes;nat=yes;socket=udp:172.16.200.100:5060>
Via: SIP/2.0/UDP 127.0.0.1:5062;branch=z9hG4bKe779.1f34854ebc81903cda767aa00b4a436c.0
Via: SIP/2.0/UDP 127.0.0.1;branch=z9hG4bKe779.0f1a88ca8a15e6864ead4246d174fe01.0
Via: SIP/2.0/UDP 172.16.100.209:5060;received=172.16.100.209;rport=5060;branch=z9hG4bKPjLNPa1QtMkA0BFLAAbk2YVw1J3CoYCCxd
From: <sip:51123456789 at ss.example.org>;tag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW
To: <sip:51187654321 at ss.example.org>;tag=0C237A4B-694AB1720007E2A1-8AFFD6C0
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm
CSeq: 13040 INVITE
Content-Length: 0


2025/12/23 12:13:20.478339 127.0.0.1:5062 -> 127.0.0.1:5080
ACK sip:bob-NcLgBHqkpNe6F41 at 192.168.1.101:51759 SIP/2.0
Via: SIP/2.0/UDP 127.0.0.1:5062;branch=z9hG4bKe779.1f34854ebc81903cda767aa00b4a436c.0
Route: <sip:lb at 127.0.0.1;lr;received=sip:187.34.45.65:51759;socket=sip:138.99.96.64:5060>
Max-Forwards: 68
From: <sip:51123456789 at ss.example.org>;tag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW
To: <sip:51187654321 at ss.example.org>;tag=0C237A4B-694AB1720007E2A1-8AFFD6C0
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm
CSeq: 13040 ACK
Content-Length: 0


2025/12/23 12:13:20.485354 127.0.0.1:5062 -> 127.0.0.1:5060
SIP/2.0 408 Request Timeout
Via: SIP/2.0/UDP 127.0.0.1;branch=z9hG4bKe779.0f1a88ca8a15e6864ead4246d174fe01.0
Via: SIP/2.0/UDP 172.16.100.209:5060;received=172.16.100.209;rport=5060;branch=z9hG4bKPjLNPa1QtMkA0BFLAAbk2YVw1J3CoYCCxd
From: <sip:alice at ss.example.org>;tag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW
To: <sip:51187654321 at ss.example.org>;tag=f3067022b00c564156251ba2f28f331f-78550000
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm
CSeq: 13040 INVITE
P-Out-Socket: udp:172.16.200.100:5060
P-NGCP-Auth-IP: 172.16.100.209
P-NGCP-Auth-UA: uagv1
P-NGCP-Authorization: alice at ss.example.org
P-NGCP-Authorized: 1
P-NGCP-Caller-Info: <sip:alice at ss.example.org>;ip=172.16.100.209;port=5060;primary=51123456789
P-Caller-UUID: dd4fdcd3-f688-4fd9-abc3-345649c967a5
P-Callee-Uuid: cdf7da76-445f-4524-9282-e52c7da2beca
P-NGCP-Announce-Handle: callee_tmp_unavailable
P-NGCP-Caller-Info: <sip:alice at ss.example.org>;ip=172.16.100.209;port=5060;primary=51123456789
P-NGCP-Callee-Info: <sip:51187654321 at ss.example.org>;ip=192.168.1.101;port=51759;primary=51187654321
Server: Sipwise NGCP Proxy mr13.5.1
Content-Length: 0


2025/12/23 12:13:20.485426 127.0.0.1:5060 -> 127.0.0.1:5062
ACK sip:51187654321 at ss.example.org:5060 SIP/2.0
Via: SIP/2.0/UDP 127.0.0.1;branch=z9hG4bKe779.0f1a88ca8a15e6864ead4246d174fe01.0
Max-Forwards: 69
From: <sip:alice at ss.example.org>;tag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW
To: <sip:51187654321 at ss.example.org>;tag=f3067022b00c564156251ba2f28f331f-78550000
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm
CSeq: 13040 ACK
Content-Length: 0


2025/12/23 12:13:20.485594 172.16.200.100:5060 -> 172.16.100.209:5060
SIP/2.0 408 Request Timeout
Via: SIP/2.0/UDP 172.16.100.209:5060;received=172.16.100.209;rport=5060;branch=z9hG4bKPjLNPa1QtMkA0BFLAAbk2YVw1J3CoYCCxd
From: <sip:alice at ss.example.org>;tag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW
To: <sip:51187654321 at ss.example.org>;tag=f3067022b00c564156251ba2f28f331f-78550000
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm
CSeq: 13040 INVITE
Server: Sipwise NGCP Proxy mr13.5.1
Content-Length: 0


2025/12/23 12:13:20.497652 172.16.100.209:5060 -> 172.16.200.100:5060
ACK sip:51187654321 at ss.example.org:5060 SIP/2.0
Via: SIP/2.0/UDP 172.16.100.209:5060;rport;branch=z9hG4bKPjLNPa1QtMkA0BFLAAbk2YVw1J3CoYCCxd
Max-Forwards: 70
From: <sip:alice at ss.example.org>;tag=ssiS3Twf8MjCC3SJ22KwwVN46B.DPhCW
To: <sip:51187654321 at ss.example.org>;tag=f3067022b00c564156251ba2f28f331f-78550000
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm
CSeq: 13040 ACK
Content-Length:  0


2025/12/23 12:12:50.517336 127.0.0.1:5080 -> 127.0.0.1:5062
INVITE sip:bob-NcLgBHqkpNe6F41 at 192.168.1.101:51759 SIP/2.0
Via: SIP/2.0/UDP 127.0.0.1:5080;branch=z9hG4bKcYpilaEg;rport
From: <sip:51123456789 at ss.example.org>;tag=5F9E5485-694AB1720007E3DA-B848D6C0
To: <sip:bob-NcLgBHqkpNe6F41 at ss.example.org>
CSeq: 10 INVITE
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm_b2b-1
Route: <sip:127.0.0.1:5062;lr>
Max-Forwards: 70
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, SUBSCRIBE, NOTIFY, OPTIONS
Supported: replaces, 100rel, norefersub
P-LB-Uptime: 1608
P-Asserted-Identity: <sip:51123456789 at ss.example.org>
P-Caller-UUID: dd4fdcd3-f688-4fd9-abc3-345649c967a5
P-NGCP-Caller-Info: <sip:alice at ss.example.org>;ip=172.16.100.209;port=5060;primary=51123456789
P-NGCP-Callee-Info: <sip:51187654321 at ss.example.org>;ip=187.34.45.65;port=51759;primary=51187654321
P-D-Uri: sip:lb at 127.0.0.1;lr;received=sip:187.34.45.65:51759;socket=sip:138.99.96.64:5060
Content-Type: application/sdp
Contact: <sip:127.0.0.1:5080;transport=udp>
Content-Length: 378

v=0
o=- 3975491569 3975491569 IN IP4 172.100.100.4
s=pjmedia
t=0 0
m=audio 39840 RTP/AVP 0 8 2 110 18 9 96
c=IN IP4 172.100.100.4
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:2 G726-32/8000
a=rtpmap:110 G726-32/8000
a=rtpmap:18 G729/8000
a=rtpmap:9 G722/16000
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-15
a=sendrecv
a=rtcp:39841
a=ptime:20
a=direction:both


2025/12/23 12:12:50.518177 127.0.0.1:5062 -> 127.0.0.1:5080
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 127.0.0.1:5080;branch=z9hG4bKcYpilaEg;rport=5080;received=127.0.0.1
From: <sip:51123456789 at ss.example.org>;tag=5F9E5485-694AB1720007E3DA-B848D6C0
To: <sip:bob-NcLgBHqkpNe6F41 at ss.example.org>
CSeq: 10 INVITE
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm_b2b-1
Server: Sipwise NGCP Proxy mr13.5.1
Content-Length: 0


2025/12/23 12:12:50.518455 127.0.0.1:5062 -> 127.0.0.1:5060
INVITE sip:bob-NcLgBHqkpNe6F41 at 192.168.1.101:51759 SIP/2.0
Record-Route: <sip:127.0.0.1:5062;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;leg_b=1;did=a09.084>
Via: SIP/2.0/UDP 127.0.0.1:5062;branch=z9hG4bK820b.e84555e9f1f01cfb40962ef7b2e7442b.0
Via: SIP/2.0/UDP 127.0.0.1:5080;received=127.0.0.1;branch=z9hG4bKcYpilaEg;rport=5080
From: <sip:51123456789 at ss.example.org>;tag=5F9E5485-694AB1720007E3DA-B848D6C0
To: <sip:bob-NcLgBHqkpNe6F41 at ss.example.org>
CSeq: 10 INVITE
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm_b2b-1
Max-Forwards: 70
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, SUBSCRIBE, NOTIFY, OPTIONS
Supported: replaces, 100rel, norefersub
P-LB-Uptime: 1608
P-Asserted-Identity: <sip:51123456789 at ss.example.org>
P-Caller-UUID: dd4fdcd3-f688-4fd9-abc3-345649c967a5
P-NGCP-Caller-Info: <sip:alice at ss.example.org>;ip=172.16.100.209;port=5060;primary=51123456789
P-NGCP-Callee-Info: <sip:51187654321 at ss.example.org>;ip=187.34.45.65;port=51759;primary=51187654321
P-D-Uri: sip:lb at 127.0.0.1;lr;received=sip:187.34.45.65:51759;socket=sip:138.99.96.64:5060
Content-Type: application/sdp
Contact: <sip:127.0.0.1:5080;transport=udp>
Content-Length: 378

v=0
o=- 3975491569 3975491569 IN IP4 172.100.100.4
s=pjmedia
t=0 0
m=audio 39840 RTP/AVP 0 8 2 110 18 9 96
c=IN IP4 172.100.100.4
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:2 G726-32/8000
a=rtpmap:110 G726-32/8000
a=rtpmap:18 G729/8000
a=rtpmap:9 G722/16000
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-15
a=sendrecv
a=rtcp:39841
a=ptime:20
a=direction:both


2025/12/23 12:12:50.519292 127.0.0.1:5060 -> 127.0.0.1:5062
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 127.0.0.1:5062;branch=z9hG4bK820b.e84555e9f1f01cfb40962ef7b2e7442b.0;rport=5062
Via: SIP/2.0/UDP 127.0.0.1:5080;received=127.0.0.1;branch=z9hG4bKcYpilaEg;rport=5080
From: <sip:51123456789 at ss.example.org>;tag=5F9E5485-694AB1720007E3DA-B848D6C0
To: <sip:bob-NcLgBHqkpNe6F41 at ss.example.org>
CSeq: 10 INVITE
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm_b2b-1
Server: Sipwise NGCP LB mr13.5.1
Content-Length: 0


2025/12/23 12:12:50.519358 138.99.96.64:5060 -> 187.34.45.65:51759
INVITE sip:bob-NcLgBHqkpNe6F41 at 192.168.1.101:51759 SIP/2.0
Record-Route: <sip:138.99.96.64;r2=on;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;ngcplb=yes;socket=sip:138.99.96.64:5060>
Record-Route: <sip:127.0.0.1;r2=on;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;ngcplb=yes;socket=sip:138.99.96.64:5060>
Record-Route: <sip:127.0.0.1:5062;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;leg_b=1;did=a09.084>
Via: SIP/2.0/UDP 138.99.96.64;branch=z9hG4bK820b.1ac9baa466b0a7cdb79ddc810a81796d.0
Via: SIP/2.0/UDP 127.0.0.1:5062;rport=5062;branch=z9hG4bK820b.e84555e9f1f01cfb40962ef7b2e7442b.0
Via: SIP/2.0/UDP 127.0.0.1:5080;received=127.0.0.1;branch=z9hG4bKcYpilaEg;rport=5080
From: <sip:51123456789 at ss.example.org>;tag=5F9E5485-694AB1720007E3DA-B848D6C0
To: <sip:bob-NcLgBHqkpNe6F41 at ss.example.org>
CSeq: 10 INVITE
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm_b2b-1
Max-Forwards: 69
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, SUBSCRIBE, NOTIFY, OPTIONS
Supported: replaces, 100rel, norefersub
P-Asserted-Identity: <sip:51123456789 at ss.example.org>
Content-Type: application/sdp
Content-Length: 378
Contact: <sip:ngcp-lb at 138.99.96.64:5060;ngcpct=7369703a3132372e302e302e313a35303830>

v=0
o=- 3975491569 3975491569 IN IP4 172.100.100.4
s=pjmedia
t=0 0
m=audio 39840 RTP/AVP 0 8 2 110 18 9 96
c=IN IP4 172.100.100.4
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:2 G726-32/8000
a=rtpmap:110 G726-32/8000
a=rtpmap:18 G729/8000
a=rtpmap:9 G722/16000
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-15
a=sendrecv
a=rtcp:39841
a=ptime:20
a=direction:both


2025/12/23 12:12:50.976156 138.99.96.64:5060 -> 187.34.45.65:51759
INVITE sip:bob-NcLgBHqkpNe6F41 at 192.168.1.101:51759 SIP/2.0
Record-Route: <sip:138.99.96.64;r2=on;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;ngcplb=yes;socket=sip:138.99.96.64:5060>
Record-Route: <sip:127.0.0.1;r2=on;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;ngcplb=yes;socket=sip:138.99.96.64:5060>
Record-Route: <sip:127.0.0.1:5062;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;leg_b=1;did=a09.084>
Via: SIP/2.0/UDP 138.99.96.64;branch=z9hG4bK820b.1ac9baa466b0a7cdb79ddc810a81796d.0
Via: SIP/2.0/UDP 127.0.0.1:5062;rport=5062;branch=z9hG4bK820b.e84555e9f1f01cfb40962ef7b2e7442b.0
Via: SIP/2.0/UDP 127.0.0.1:5080;received=127.0.0.1;branch=z9hG4bKcYpilaEg;rport=5080
From: <sip:51123456789 at ss.example.org>;tag=5F9E5485-694AB1720007E3DA-B848D6C0
To: <sip:bob-NcLgBHqkpNe6F41 at ss.example.org>
CSeq: 10 INVITE
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm_b2b-1
Max-Forwards: 69
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, SUBSCRIBE, NOTIFY, OPTIONS
Supported: replaces, 100rel, norefersub
P-Asserted-Identity: <sip:51123456789 at ss.example.org>
Content-Type: application/sdp
Content-Length: 378
Contact: <sip:ngcp-lb at 138.99.96.64:5060;ngcpct=7369703a3132372e302e302e313a35303830>

v=0
o=- 3975491569 3975491569 IN IP4 172.100.100.4
s=pjmedia
t=0 0
m=audio 39840 RTP/AVP 0 8 2 110 18 9 96
c=IN IP4 172.100.100.4
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:2 G726-32/8000
a=rtpmap:110 G726-32/8000
a=rtpmap:18 G729/8000
a=rtpmap:9 G722/16000
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-15
a=sendrecv
a=rtcp:39841
a=ptime:20
a=direction:both


2025/12/23 12:12:51.976197 138.99.96.64:5060 -> 187.34.45.65:51759
INVITE sip:bob-NcLgBHqkpNe6F41 at 192.168.1.101:51759 SIP/2.0
Record-Route: <sip:138.99.96.64;r2=on;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;ngcplb=yes;socket=sip:138.99.96.64:5060>
Record-Route: <sip:127.0.0.1;r2=on;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;ngcplb=yes;socket=sip:138.99.96.64:5060>
Record-Route: <sip:127.0.0.1:5062;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;leg_b=1;did=a09.084>
Via: SIP/2.0/UDP 138.99.96.64;branch=z9hG4bK820b.1ac9baa466b0a7cdb79ddc810a81796d.0
Via: SIP/2.0/UDP 127.0.0.1:5062;rport=5062;branch=z9hG4bK820b.e84555e9f1f01cfb40962ef7b2e7442b.0
Via: SIP/2.0/UDP 127.0.0.1:5080;received=127.0.0.1;branch=z9hG4bKcYpilaEg;rport=5080
From: <sip:51123456789 at ss.example.org>;tag=5F9E5485-694AB1720007E3DA-B848D6C0
To: <sip:bob-NcLgBHqkpNe6F41 at ss.example.org>
CSeq: 10 INVITE
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm_b2b-1
Max-Forwards: 69
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, SUBSCRIBE, NOTIFY, OPTIONS
Supported: replaces, 100rel, norefersub
P-Asserted-Identity: <sip:51123456789 at ss.example.org>
Content-Type: application/sdp
Content-Length: 378
Contact: <sip:ngcp-lb at 138.99.96.64:5060;ngcpct=7369703a3132372e302e302e313a35303830>

v=0
o=- 3975491569 3975491569 IN IP4 172.100.100.4
s=pjmedia
t=0 0
m=audio 39840 RTP/AVP 0 8 2 110 18 9 96
c=IN IP4 172.100.100.4
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:2 G726-32/8000
a=rtpmap:110 G726-32/8000
a=rtpmap:18 G729/8000
a=rtpmap:9 G722/16000
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-15
a=sendrecv
a=rtcp:39841
a=ptime:20
a=direction:both


2025/12/23 12:12:53.976197 138.99.96.64:5060 -> 187.34.45.65:51759
INVITE sip:bob-NcLgBHqkpNe6F41 at 192.168.1.101:51759 SIP/2.0
Record-Route: <sip:138.99.96.64;r2=on;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;ngcplb=yes;socket=sip:138.99.96.64:5060>
Record-Route: <sip:127.0.0.1;r2=on;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;ngcplb=yes;socket=sip:138.99.96.64:5060>
Record-Route: <sip:127.0.0.1:5062;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;leg_b=1;did=a09.084>
Via: SIP/2.0/UDP 138.99.96.64;branch=z9hG4bK820b.1ac9baa466b0a7cdb79ddc810a81796d.0
Via: SIP/2.0/UDP 127.0.0.1:5062;rport=5062;branch=z9hG4bK820b.e84555e9f1f01cfb40962ef7b2e7442b.0
Via: SIP/2.0/UDP 127.0.0.1:5080;received=127.0.0.1;branch=z9hG4bKcYpilaEg;rport=5080
From: <sip:51123456789 at ss.example.org>;tag=5F9E5485-694AB1720007E3DA-B848D6C0
To: <sip:bob-NcLgBHqkpNe6F41 at ss.example.org>
CSeq: 10 INVITE
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm_b2b-1
Max-Forwards: 69
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, SUBSCRIBE, NOTIFY, OPTIONS
Supported: replaces, 100rel, norefersub
P-Asserted-Identity: <sip:51123456789 at ss.example.org>
Content-Type: application/sdp
Content-Length: 378
Contact: <sip:ngcp-lb at 138.99.96.64:5060;ngcpct=7369703a3132372e302e302e313a35303830>

v=0
o=- 3975491569 3975491569 IN IP4 172.100.100.4
s=pjmedia
t=0 0
m=audio 39840 RTP/AVP 0 8 2 110 18 9 96
c=IN IP4 172.100.100.4
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:2 G726-32/8000
a=rtpmap:110 G726-32/8000
a=rtpmap:18 G729/8000
a=rtpmap:9 G722/16000
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-15
a=sendrecv
a=rtcp:39841
a=ptime:20
a=direction:both


2025/12/23 12:12:57.976194 138.99.96.64:5060 -> 187.34.45.65:51759
INVITE sip:bob-NcLgBHqkpNe6F41 at 192.168.1.101:51759 SIP/2.0
Record-Route: <sip:138.99.96.64;r2=on;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;ngcplb=yes;socket=sip:138.99.96.64:5060>
Record-Route: <sip:127.0.0.1;r2=on;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;ngcplb=yes;socket=sip:138.99.96.64:5060>
Record-Route: <sip:127.0.0.1:5062;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;leg_b=1;did=a09.084>
Via: SIP/2.0/UDP 138.99.96.64;branch=z9hG4bK820b.1ac9baa466b0a7cdb79ddc810a81796d.0
Via: SIP/2.0/UDP 127.0.0.1:5062;rport=5062;branch=z9hG4bK820b.e84555e9f1f01cfb40962ef7b2e7442b.0
Via: SIP/2.0/UDP 127.0.0.1:5080;received=127.0.0.1;branch=z9hG4bKcYpilaEg;rport=5080
From: <sip:51123456789 at ss.example.org>;tag=5F9E5485-694AB1720007E3DA-B848D6C0
To: <sip:bob-NcLgBHqkpNe6F41 at ss.example.org>
CSeq: 10 INVITE
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm_b2b-1
Max-Forwards: 69
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, SUBSCRIBE, NOTIFY, OPTIONS
Supported: replaces, 100rel, norefersub
P-Asserted-Identity: <sip:51123456789 at ss.example.org>
Content-Type: application/sdp
Content-Length: 378
Contact: <sip:ngcp-lb at 138.99.96.64:5060;ngcpct=7369703a3132372e302e302e313a35303830>

v=0
o=- 3975491569 3975491569 IN IP4 172.100.100.4
s=pjmedia
t=0 0
m=audio 39840 RTP/AVP 0 8 2 110 18 9 96
c=IN IP4 172.100.100.4
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:2 G726-32/8000
a=rtpmap:110 G726-32/8000
a=rtpmap:18 G729/8000
a=rtpmap:9 G722/16000
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-15
a=sendrecv
a=rtcp:39841
a=ptime:20
a=direction:both


2025/12/23 12:13:01.976165 138.99.96.64:5060 -> 187.34.45.65:51759
INVITE sip:bob-NcLgBHqkpNe6F41 at 192.168.1.101:51759 SIP/2.0
Record-Route: <sip:138.99.96.64;r2=on;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;ngcplb=yes;socket=sip:138.99.96.64:5060>
Record-Route: <sip:127.0.0.1;r2=on;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;ngcplb=yes;socket=sip:138.99.96.64:5060>
Record-Route: <sip:127.0.0.1:5062;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;leg_b=1;did=a09.084>
Via: SIP/2.0/UDP 138.99.96.64;branch=z9hG4bK820b.1ac9baa466b0a7cdb79ddc810a81796d.0
Via: SIP/2.0/UDP 127.0.0.1:5062;rport=5062;branch=z9hG4bK820b.e84555e9f1f01cfb40962ef7b2e7442b.0
Via: SIP/2.0/UDP 127.0.0.1:5080;received=127.0.0.1;branch=z9hG4bKcYpilaEg;rport=5080
From: <sip:51123456789 at ss.example.org>;tag=5F9E5485-694AB1720007E3DA-B848D6C0
To: <sip:bob-NcLgBHqkpNe6F41 at ss.example.org>
CSeq: 10 INVITE
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm_b2b-1
Max-Forwards: 69
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, SUBSCRIBE, NOTIFY, OPTIONS
Supported: replaces, 100rel, norefersub
P-Asserted-Identity: <sip:51123456789 at ss.example.org>
Content-Type: application/sdp
Content-Length: 378
Contact: <sip:ngcp-lb at 138.99.96.64:5060;ngcpct=7369703a3132372e302e302e313a35303830>

v=0
o=- 3975491569 3975491569 IN IP4 172.100.100.4
s=pjmedia
t=0 0
m=audio 39840 RTP/AVP 0 8 2 110 18 9 96
c=IN IP4 172.100.100.4
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:2 G726-32/8000
a=rtpmap:110 G726-32/8000
a=rtpmap:18 G729/8000
a=rtpmap:9 G722/16000
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-15
a=sendrecv
a=rtcp:39841
a=ptime:20
a=direction:both


2025/12/23 12:13:05.976169 138.99.96.64:5060 -> 187.34.45.65:51759
INVITE sip:bob-NcLgBHqkpNe6F41 at 192.168.1.101:51759 SIP/2.0
Record-Route: <sip:138.99.96.64;r2=on;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;ngcplb=yes;socket=sip:138.99.96.64:5060>
Record-Route: <sip:127.0.0.1;r2=on;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;ngcplb=yes;socket=sip:138.99.96.64:5060>
Record-Route: <sip:127.0.0.1:5062;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;leg_b=1;did=a09.084>
Via: SIP/2.0/UDP 138.99.96.64;branch=z9hG4bK820b.1ac9baa466b0a7cdb79ddc810a81796d.0
Via: SIP/2.0/UDP 127.0.0.1:5062;rport=5062;branch=z9hG4bK820b.e84555e9f1f01cfb40962ef7b2e7442b.0
Via: SIP/2.0/UDP 127.0.0.1:5080;received=127.0.0.1;branch=z9hG4bKcYpilaEg;rport=5080
From: <sip:51123456789 at ss.example.org>;tag=5F9E5485-694AB1720007E3DA-B848D6C0
To: <sip:bob-NcLgBHqkpNe6F41 at ss.example.org>
CSeq: 10 INVITE
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm_b2b-1
Max-Forwards: 69
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, SUBSCRIBE, NOTIFY, OPTIONS
Supported: replaces, 100rel, norefersub
P-Asserted-Identity: <sip:51123456789 at ss.example.org>
Content-Type: application/sdp
Content-Length: 378
Contact: <sip:ngcp-lb at 138.99.96.64:5060;ngcpct=7369703a3132372e302e302e313a35303830>

v=0
o=- 3975491569 3975491569 IN IP4 172.100.100.4
s=pjmedia
t=0 0
m=audio 39840 RTP/AVP 0 8 2 110 18 9 96
c=IN IP4 172.100.100.4
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:2 G726-32/8000
a=rtpmap:110 G726-32/8000
a=rtpmap:18 G729/8000
a=rtpmap:9 G722/16000
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-15
a=sendrecv
a=rtcp:39841
a=ptime:20
a=direction:both


2025/12/23 12:13:09.976194 138.99.96.64:5060 -> 187.34.45.65:51759
INVITE sip:bob-NcLgBHqkpNe6F41 at 192.168.1.101:51759 SIP/2.0
Record-Route: <sip:138.99.96.64;r2=on;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;ngcplb=yes;socket=sip:138.99.96.64:5060>
Record-Route: <sip:127.0.0.1;r2=on;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;ngcplb=yes;socket=sip:138.99.96.64:5060>
Record-Route: <sip:127.0.0.1:5062;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;leg_b=1;did=a09.084>
Via: SIP/2.0/UDP 138.99.96.64;branch=z9hG4bK820b.1ac9baa466b0a7cdb79ddc810a81796d.0
Via: SIP/2.0/UDP 127.0.0.1:5062;rport=5062;branch=z9hG4bK820b.e84555e9f1f01cfb40962ef7b2e7442b.0
Via: SIP/2.0/UDP 127.0.0.1:5080;received=127.0.0.1;branch=z9hG4bKcYpilaEg;rport=5080
From: <sip:51123456789 at ss.example.org>;tag=5F9E5485-694AB1720007E3DA-B848D6C0
To: <sip:bob-NcLgBHqkpNe6F41 at ss.example.org>
CSeq: 10 INVITE
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm_b2b-1
Max-Forwards: 69
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, SUBSCRIBE, NOTIFY, OPTIONS
Supported: replaces, 100rel, norefersub
P-Asserted-Identity: <sip:51123456789 at ss.example.org>
Content-Type: application/sdp
Content-Length: 378
Contact: <sip:ngcp-lb at 138.99.96.64:5060;ngcpct=7369703a3132372e302e302e313a35303830>

v=0
o=- 3975491569 3975491569 IN IP4 172.100.100.4
s=pjmedia
t=0 0
m=audio 39840 RTP/AVP 0 8 2 110 18 9 96
c=IN IP4 172.100.100.4
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:2 G726-32/8000
a=rtpmap:110 G726-32/8000
a=rtpmap:18 G729/8000
a=rtpmap:9 G722/16000
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-15
a=sendrecv
a=rtcp:39841
a=ptime:20
a=direction:both


2025/12/23 12:13:13.976197 138.99.96.64:5060 -> 187.34.45.65:51759
INVITE sip:bob-NcLgBHqkpNe6F41 at 192.168.1.101:51759 SIP/2.0
Record-Route: <sip:138.99.96.64;r2=on;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;ngcplb=yes;socket=sip:138.99.96.64:5060>
Record-Route: <sip:127.0.0.1;r2=on;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;ngcplb=yes;socket=sip:138.99.96.64:5060>
Record-Route: <sip:127.0.0.1:5062;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;leg_b=1;did=a09.084>
Via: SIP/2.0/UDP 138.99.96.64;branch=z9hG4bK820b.1ac9baa466b0a7cdb79ddc810a81796d.0
Via: SIP/2.0/UDP 127.0.0.1:5062;rport=5062;branch=z9hG4bK820b.e84555e9f1f01cfb40962ef7b2e7442b.0
Via: SIP/2.0/UDP 127.0.0.1:5080;received=127.0.0.1;branch=z9hG4bKcYpilaEg;rport=5080
From: <sip:51123456789 at ss.example.org>;tag=5F9E5485-694AB1720007E3DA-B848D6C0
To: <sip:bob-NcLgBHqkpNe6F41 at ss.example.org>
CSeq: 10 INVITE
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm_b2b-1
Max-Forwards: 69
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, SUBSCRIBE, NOTIFY, OPTIONS
Supported: replaces, 100rel, norefersub
P-Asserted-Identity: <sip:51123456789 at ss.example.org>
Content-Type: application/sdp
Content-Length: 378
Contact: <sip:ngcp-lb at 138.99.96.64:5060;ngcpct=7369703a3132372e302e302e313a35303830>

v=0
o=- 3975491569 3975491569 IN IP4 172.100.100.4
s=pjmedia
t=0 0
m=audio 39840 RTP/AVP 0 8 2 110 18 9 96
c=IN IP4 172.100.100.4
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:2 G726-32/8000
a=rtpmap:110 G726-32/8000
a=rtpmap:18 G729/8000
a=rtpmap:9 G722/16000
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-15
a=sendrecv
a=rtcp:39841
a=ptime:20
a=direction:both


2025/12/23 12:13:17.976160 138.99.96.64:5060 -> 187.34.45.65:51759
INVITE sip:bob-NcLgBHqkpNe6F41 at 192.168.1.101:51759 SIP/2.0
Record-Route: <sip:138.99.96.64;r2=on;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;ngcplb=yes;socket=sip:138.99.96.64:5060>
Record-Route: <sip:127.0.0.1;r2=on;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;ngcplb=yes;socket=sip:138.99.96.64:5060>
Record-Route: <sip:127.0.0.1:5062;lr=on;ftag=5F9E5485-694AB1720007E3DA-B848D6C0;leg_b=1;did=a09.084>
Via: SIP/2.0/UDP 138.99.96.64;branch=z9hG4bK820b.1ac9baa466b0a7cdb79ddc810a81796d.0
Via: SIP/2.0/UDP 127.0.0.1:5062;rport=5062;branch=z9hG4bK820b.e84555e9f1f01cfb40962ef7b2e7442b.0
Via: SIP/2.0/UDP 127.0.0.1:5080;received=127.0.0.1;branch=z9hG4bKcYpilaEg;rport=5080
From: <sip:51123456789 at ss.example.org>;tag=5F9E5485-694AB1720007E3DA-B848D6C0
To: <sip:bob-NcLgBHqkpNe6F41 at ss.example.org>
CSeq: 10 INVITE
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm_b2b-1
Max-Forwards: 69
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, SUBSCRIBE, NOTIFY, OPTIONS
Supported: replaces, 100rel, norefersub
P-Asserted-Identity: <sip:51123456789 at ss.example.org>
Content-Type: application/sdp
Content-Length: 378
Contact: <sip:ngcp-lb at 138.99.96.64:5060;ngcpct=7369703a3132372e302e302e313a35303830>

v=0
o=- 3975491569 3975491569 IN IP4 172.100.100.4
s=pjmedia
t=0 0
m=audio 39840 RTP/AVP 0 8 2 110 18 9 96
c=IN IP4 172.100.100.4
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:2 G726-32/8000
a=rtpmap:110 G726-32/8000
a=rtpmap:18 G729/8000
a=rtpmap:9 G722/16000
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-15
a=sendrecv
a=rtcp:39841
a=ptime:20
a=direction:both


2025/12/23 12:13:20.476309 127.0.0.1:5060 -> 127.0.0.1:5062
SIP/2.0 408 Request Timeout
Via: SIP/2.0/UDP 127.0.0.1:5062;branch=z9hG4bK820b.e84555e9f1f01cfb40962ef7b2e7442b.0;rport=5062
Via: SIP/2.0/UDP 127.0.0.1:5080;received=127.0.0.1;branch=z9hG4bKcYpilaEg;rport=5080
From: <sip:51123456789 at ss.example.org>;tag=5F9E5485-694AB1720007E3DA-B848D6C0
To: <sip:bob-NcLgBHqkpNe6F41 at ss.example.org>;tag=787599a0bcb59b1ddd05c9f8f0a286e6-897e8af0
CSeq: 10 INVITE
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm_b2b-1
Server: Sipwise NGCP LB mr13.5.1
Content-Length: 0


2025/12/23 12:13:20.476958 127.0.0.1:5062 -> 127.0.0.1:5060
ACK sip:bob-NcLgBHqkpNe6F41 at 192.168.1.101:51759 SIP/2.0
Via: SIP/2.0/UDP 127.0.0.1:5062;branch=z9hG4bK820b.e84555e9f1f01cfb40962ef7b2e7442b.0
From: <sip:51123456789 at ss.example.org>;tag=5F9E5485-694AB1720007E3DA-B848D6C0
To: <sip:bob-NcLgBHqkpNe6F41 at ss.example.org>;tag=787599a0bcb59b1ddd05c9f8f0a286e6-897e8af0
CSeq: 10 ACK
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm_b2b-1
Max-Forwards: 70
Content-Length: 0


2025/12/23 12:13:20.477191 127.0.0.1:5062 -> 127.0.0.1:5080
SIP/2.0 408 Request Timeout
Via: SIP/2.0/UDP 127.0.0.1:5080;received=127.0.0.1;branch=z9hG4bKcYpilaEg;rport=5080
From: <sip:51123456789 at ss.example.org>;tag=5F9E5485-694AB1720007E3DA-B848D6C0
To: <sip:bob-NcLgBHqkpNe6F41 at ss.example.org>;tag=787599a0bcb59b1ddd05c9f8f0a286e6-897e8af0
CSeq: 10 INVITE
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm_b2b-1
Server: Sipwise NGCP LB mr13.5.1
Content-Length: 0


2025/12/23 12:13:20.477318 127.0.0.1:5080 -> 127.0.0.1:5062
ACK sip:bob-NcLgBHqkpNe6F41 at 192.168.1.101:51759 SIP/2.0
Via: SIP/2.0/UDP 127.0.0.1:5080;branch=z9hG4bKcYpilaEg;rport
From: <sip:51123456789 at ss.example.org>;tag=5F9E5485-694AB1720007E3DA-B848D6C0
To: <sip:bob-NcLgBHqkpNe6F41 at ss.example.org>;tag=787599a0bcb59b1ddd05c9f8f0a286e6-897e8af0
Call-ID: 9Kpker258nXOoe3zevPykOoTwKeWRtlm_b2b-1
CSeq: 10 ACK
Route: <sip:127.0.0.1:5062;lr>
Content-Length: 0


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