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Yeasart S20 Deutschland Lan ALL-IP Siptrunk Telekom

Hello Community,
i've a Yeastar S20 on Deutschland-Lan-ALL-IP Siptrunk Telekom.

Everythink works fine for weeks - or nobody has register the fail.

Some calls were rejected. So I make a wireshark and have a look, thats what i found:

Frame 5057: 139 bytes on wire (1112 bits), 139 bytes captured (1112 bits)
Logical-Link Control
Ethernet II, Src: JuniperN_62:7a:18 (28:8a:1c:62:7a:18), Dst: AvmAudio_23:91:73 (c8:0e:14:23:91:73)
802.1Q Virtual LAN, PRI: 5, DEI: 0, ID: 7
PPP-over-Ethernet Session
Point-to-Point Protocol
Internet Protocol Version 4, Src: 217.0.26.67, Dst: 80.151.15.217
Transmission Control Protocol, Src Port: 5060, Dst Port: 56586, Seq: 2600, Ack: 1276, Len: 51
[2 Reassembled TCP Segments (1491 bytes): #5056(1440), #5057(51)]
Session Initiation Protocol (INVITE)
Request-Line: INVITE sip:+4925432382280@192.168.2.59:56586;transport=TCP SIP/2.0
Method: INVITE
Request-URI: sip:+4925432382280@192.168.2.59:56586;transport=TCP
Request-URI User Part: +4925432382280
E.164 number (MSISDN): 4925432382280
Request-URI Host Part: 192.168.2.59
Request-URI Host Port: 56586
[Resent Packet: False]
Message Header
Via: SIP/2.0/TCP 217.0.26.67:5060;branch=z9hG4bK7625dd44d66fc8eefb5b7c59a30aaf26.e2c7ab1b
Transport: TCP
Sent-by Address: 217.0.26.67
Sent-by port: 5060
Branch: z9hG4bK7625dd44d66fc8eefb5b7c59a30aaf26.e2c7ab1b
Record-Route: <sip:reg.sip-trunk.telekom.de;transport=tcp;lr>
Max-Forwards: 61
To: <sip:025432382280@tel.t-online.de>
SIP to address: sip:025432382280@tel.t-online.de
SIP to address User Part: 025432382280
SIP to address Host Part: tel.t-online.de
From: <sip:+49251314273@sip-trunk.telekom.de;user=phone>;tag=fa50349d
SIP from address: sip:+49251314273@sip-trunk.telekom.de;user=phone
SIP from address User Part: +49251314273
E.164 number (MSISDN): 49251314273
SIP from address Host Part: sip-trunk.telekom.de
SIP From URI parameter: user=phone
SIP from tag: fa50349d
Call-ID: d3165d8b898526da@62.156.103.199
Contact: <sip:xuZvlsQFAKLI4/l5g8og9zMxcAc8e3ellaLhDcu36o/OTr3LA4CKmfyAeED0C5z4k/yg@th1>
Supported: 100rel,199,gruu,histinfo,timer
Session-Expires: 1800
CSeq: 64899787 INVITE
Sequence Number: 64899787
Method: INVITE
Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, PRACK, REFER, REGISTER, SUBSCRIBE, UPDATE
Min-SE: 900
P-Asserted-Identity: <sip:+49251314273@sip-trunk.telekom.de;user=phone>
SIP PAI Address: sip:+49251314273@sip-trunk.telekom.de;user=phone
SIP PAI User Part: +49251314273
E.164 number (MSISDN): 49251314273
SIP PAI Host Part: sip-trunk.telekom.de
SIP PAI URI parameter: user=phone
P-Called-Party-ID: <sip:+4925432382280@sip-trunk.telekom.de;user=phone>
X-TAS-Edge-Policies: send-pheader-policy=308;redirection-handling=0;max-transp-rate=-1
Accept-Contact: *;+g.3gpp.icsi-ref="urn%3Aurn-7%3A3gpp-service.ims.icsi.mmtel"
Session-ID: 004ce13a6d92bf0c6e12a7ad18f1912f
Content-Type: application/sdp
Content-Disposition: session
Content-Length: 364
Message Body

Frame 5060: 513 bytes on wire (4104 bits), 513 bytes captured (4104 bits)
Logical-Link Control
Ethernet II, Src: AvmAudio_23:91:73 (c8:0e:14:23:91:73), Dst: JuniperN_62:7a:18 (28:8a:1c:62:7a:18)
802.1Q Virtual LAN, PRI: 3, DEI: 0, ID: 7
PPP-over-Ethernet Session
Point-to-Point Protocol
Internet Protocol Version 4, Src: 80.151.15.217, Dst: 217.0.26.67
Transmission Control Protocol, Src Port: 56586, Dst Port: 5060, Seq: 1276, Ack: 2651, Len: 425
Session Initiation Protocol (100)
Status-Line: SIP/2.0 100 Trying
Status-Code: 100
[Resent Packet: False]
Message Header
Via: SIP/2.0/TCP 217.0.26.67:5060;received=217.0.26.67;branch=z9hG4bK7625dd44d66fc8eefb5b7c59a30aaf26.e2c7ab1b
Transport: TCP
Sent-by Address: 217.0.26.67
Sent-by port: 5060
Received: 217.0.26.67
Branch: z9hG4bK7625dd44d66fc8eefb5b7c59a30aaf26.e2c7ab1b
Record-Route: <sip:reg.sip-trunk.telekom.de;transport=tcp;lr>
Call-ID: d3165d8b898526da@62.156.103.199
From: <sip:+49251314273@sip-trunk.telekom.de;user=phone>;tag=fa50349d
To: <sip:025432382280@tel.t-online.de>
CSeq: 64899787 INVITE
Sequence Number: 64899787
Method: INVITE
Server: Yeastar S20-30.10.0.16
Content-Length: 0

Frame 5062: 579 bytes on wire (4632 bits), 579 bytes captured (4632 bits)
Logical-Link Control
Ethernet II, Src: AvmAudio_23:91:73 (c8:0e:14:23:91:73), Dst: JuniperN_62:7a:18 (28:8a:1c:62:7a:18)
802.1Q Virtual LAN, PRI: 3, DEI: 0, ID: 7
PPP-over-Ethernet Session
Point-to-Point Protocol
Internet Protocol Version 4, Src: 80.151.15.217, Dst: 217.0.26.67
Transmission Control Protocol, Src Port: 56586, Dst Port: 5060, Seq: 1701, Ack: 2651, Len: 491
Session Initiation Protocol (603)
Status-Line: SIP/2.0 603 Decline
Status-Code: 603
[Resent Packet: False]
Message Header
Via: SIP/2.0/TCP 217.0.26.67:5060;received=217.0.26.67;branch=z9hG4bK7625dd44d66fc8eefb5b7c59a30aaf26.e2c7ab1b
Transport: TCP
Sent-by Address: 217.0.26.67
Sent-by port: 5060
Received: 217.0.26.67
Branch: z9hG4bK7625dd44d66fc8eefb5b7c59a30aaf26.e2c7ab1b
Record-Route: <sip:reg.sip-trunk.telekom.de;transport=tcp;lr>
Call-ID: d3165d8b898526da@62.156.103.199
From: <sip:+49251314273@sip-trunk.telekom.de;user=phone>;tag=fa50349d
To: <sip:025432382280@tel.t-online.de>;tag=3ab9cb2e-806f-4763-9a93-c24e8ecfcb00
CSeq: 64899787 INVITE
Sequence Number: 64899787
Method: INVITE
Server: Yeastar S20-30.10.0.16
Reason: Q.850;cause=16
Reason protocols: Q.850
Cause: Normal call clearing (16)
Content-Length: 0

Frame 5066: 497 bytes on wire (3976 bits), 497 bytes captured (3976 bits)
Logical-Link Control
Ethernet II, Src: JuniperN_62:7a:18 (28:8a:1c:62:7a:18), Dst: AvmAudio_23:91:73 (c8:0e:14:23:91:73)
802.1Q Virtual LAN, PRI: 5, DEI: 0, ID: 7
PPP-over-Ethernet Session
Point-to-Point Protocol
Internet Protocol Version 4, Src: 217.0.26.67, Dst: 80.151.15.217
Transmission Control Protocol, Src Port: 5060, Dst Port: 56586, Seq: 2651, Ack: 2192, Len: 409
Session Initiation Protocol (ACK)
Request-Line: ACK sip:+4925432382280@192.168.2.59:56586;transport=TCP SIP/2.0
Method: ACK
Request-URI: sip:+4925432382280@192.168.2.59:56586;transport=TCP
Request-URI User Part: +4925432382280
E.164 number (MSISDN): 4925432382280
Request-URI Host Part: 192.168.2.59
Request-URI Host Port: 56586
[Resent Packet: False]
Message Header
Via: SIP/2.0/TCP 217.0.26.67:5060;branch=z9hG4bK7625dd44d66fc8eefb5b7c59a30aaf26.e2c7ab1b
Transport: TCP
Sent-by Address: 217.0.26.67
Sent-by port: 5060
Branch: z9hG4bK7625dd44d66fc8eefb5b7c59a30aaf26.e2c7ab1b
Max-Forwards: 61
To: <sip:025432382280@tel.t-online.de>;tag=3ab9cb2e-806f-4763-9a93-c24e8ecfcb00
From: <sip:+49251314273@sip-trunk.telekom.de;user=phone>;tag=fa50349d
Call-ID: d3165d8b898526da@62.156.103.199
CSeq: 64899787 ACK
Sequence Number: 64899787
Method: ACK
Content-Length: 0

Hope anyone can help me.

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