man kann es einstellen, dass das Gerät beim ACK etwas anderes schickt. Das macht durchaus Sinn, da wir beim Invite mit langen Namen agieren können, welche das Telefon schön über mehrere Zeilen darstellt. So kann man im Ringing schon wichtige Informationen zu dem Alarm auf das Display bringen. Beim Connect wird die Anzeige ja auf eine Zeile reduziert und so wird nicht mehr alles dargestellt. Hier wäre es ja nun schön, wenn noch die wichtigen Informationen (z.B. Ort der Alarmauslösung) angezeigt würden und nicht die weniger interessanten Teile der langen Anzeige.
  Session Initiation Protocol (INVITE)
   Request-Line: INVITE sip:1394@voip.kunde.org SIP/2.0
   Message Header
   Min-SE: 300
   Date: Wed, 31 May 2023 14:45:24 GMT
   CSeq: 1 INVITE
   Via: SIP/2.0/UDP A.B.C.248:5060;branch=z9hG4bK86dcc293-bc26-1910-8b00-005056a94cb1;rport
   Session-Expires: 3600;refresher=uas
   User-Agent: NVTVoIP/12.0.0.2219
   From: "Alarm von Geb. X, > 3 > R310" <sip:555@A.B.C.248>;tag=f6dac293-bc26-1910-8aff-005056a94cb1
   SIP from display info: "Alarm von Geb. X, > 3 > R310"
   SIP from address: sip:555@A.B.C.248
   SIP from address User Part: 555
   SIP from address Host Part: A.B.C.248
   SIP from tag: f6dac293-bc26-1910-8aff-005056a94cb1
   Call-ID: 5adbc293-bc26-1910-8aff-005056a94cb1@srv-tk-alarm
   [Generated Call-ID: 5adbc293-bc26-1910-8aff-005056a94cb1@srv-tk-alarm]
   Supported: timer, x-siemens-sipqv2
   Organization: New Voice
   To: <sip:1394@voip.kunde.org>
   SIP to address: sip:1394@voip.kunde.org
   Contact: "Alarm von Geb. X, > 3 > R310" <sip:555@A.B.C.248>
   SIP C-URI display info: "Alarm von Geb. X, > 3 > R310"
   Contact URI: sip:555@A.B.C.248
   Contact URI User Part: 555
   Contact URI Host Part: A.B.C.248
   P-Alcatel-CSBU: dtmf_auto=on;fb=notransfer
   Allow: INVITE,ACK,OPTIONS,BYE,CANCEL,SUBSCRIBE,NOTIFY,REFER,MESSAGE,INFO,PING
   Content-Type: application/sdp
   Content-Length: 306
   Max-Forwards: 70
   Message Body
   :
   :
   
  Session Initiation Protocol (200)
   Status-Line: SIP/2.0 200 OK
   Message Header
   Via: SIP/2.0/UDP A.B.C.248:5060;branch=z9hG4bK86dcc293-bc26-1910-8b00-005056a94cb1;rport=5060;received=A.B.C.248
   From: "Alarm von Geb. X, > 3 > R310" <sip:555@A.B.C.248>;tag=f6dac293-bc26-1910-8aff-005056a94cb1
   SIP from display info: "Alarm von Geb. X, > 3 > R310"
   SIP from address: sip:555@A.B.C.248
   SIP from address User Part: 555
   SIP from address Host Part: A.B.C.248
   SIP from tag: f6dac293-bc26-1910-8aff-005056a94cb1
   To: "06 TestUser06" <sip:1394@voip.kunde.org>;tag=4180623015
   SIP to display info: "06 TestUser06"
   SIP to address: sip:1394@voip.kunde.org
   SIP to tag: 4180623015
   Call-ID: 5adbc293-bc26-1910-8aff-005056a94cb1@srv-tk-alarm
   [Generated Call-ID: 5adbc293-bc26-1910-8aff-005056a94cb1@srv-tk-alarm]
   CSeq: 1 INVITE
   Contact: <sip:1394@A.B.C.38:5060;user=phone;transport=UDP>
   Contact URI: sip:1394@A.B.C.38:5060;user=phone;transport=UDP
   Contact URI User Part: 1394
   Contact URI Host Part: A.B.C.38
   Contact URI Host Port: 5060
   Contact URI parameter: user=phone
   Contact URI parameter: transport=UDP
   Allow: REGISTER,SUBSCRIBE,NOTIFY,INVITE,ACK,PRACK,OPTIONS,BYE,CANCEL,REFER,INFO,UPDATE,PUBLISH
   Content-Length: 264
   Content-Type: application/sdp
   Require: timer
   Server: (innovaphone Virtual Appliance/13r3 sr3 [13.7803/1000/0])
   Supported: 100rel,replaces,privacy,timer,from-change,histinfo,tdialog,answermode,uui
   P-Preferred-Identity: "06 TestUser06" <sip:1394@A.B.C.38;user=phone>
   SIP PPI display info: "06 TestUser06"
   SIP PPI Address: sip:1394@A.B.C.38;user=phone
   Session-Expires: 3600;refresher=uas
   Recv-Info: dtmf
   Message Body
   :
   :
  
  Session Initiation Protocol (ACK)
   Request-Line: ACK sip:1394@A.B.C.38:5060;transport=UDP;user=phone SIP/2.0
   Message Header
   CSeq: 1 ACK
   Via: SIP/2.0/UDP A.B.C.248:5060;branch=z9hG4bK2221df93-bc26-1910-8b01-005056a94cb1;rport
   From: "Geb. X, > 3 > R310" <sip:555@A.B.C.248>;tag=f6dac293-bc26-1910-8aff-005056a94cb1
   SIP from display info: "Geb. X, > 3 > R310"
   SIP from address: sip:555@A.B.C.248
   SIP from address User Part: 555
   SIP from address Host Part: A.B.C.248
   SIP from tag: f6dac293-bc26-1910-8aff-005056a94cb1
   Call-ID: 5adbc293-bc26-1910-8aff-005056a94cb1@srv-tk-alarm
   [Generated Call-ID: 5adbc293-bc26-1910-8aff-005056a94cb1@srv-tk-alarm]
   Supported: timer, x-siemens-sipqv2
   To: "06 TestUser06" <sip:1394@voip.kunde.org>;tag=4180623015
   SIP to display info: "06 TestUser06"
   SIP to address: sip:1394@voip.kunde.org
   SIP to tag: 4180623015
   Contact: <sip:NEWVOICE-MOBICALL@A.B.C.248>
   Contact URI: sip:NEWVOICE-MOBICALL@A.B.C.248
   Contact URI User Part: NEWVOICE-MOBICALL
   Contact URI Host Part: A.B.C.248
   Content-Length: 0
   Max-Forwards: 70