Lucent Technologies 5ESS - Sip 180 Ringing

Media Description, name and address (m): audio 50620 RTP/AVP 0
Media Type: audio
Media Port: 50620
Media Proto: RTP/AVP
Media Format: 0
Bandwidth Information (b): AS:64
Bandwidth Modifier: AS
Bandwidth Value: 64
Media Attribute (a): ptime:20
Media Attribute Fieldname: ptime
Media Attribute Value: 20
Media Attribute (a): rtpmap:0 PCMU/8000
Media Attribute Fieldname: rtpmap
Media Attribute Value: 0 PCMU/8000
Media Attribute (a): curr:qos local sendrecv
Media Attribute Fieldname: curr
Media Attribute Value: qos local sendrecv
Media Attribute (a): curr:qos remote sendrecv
Media Attribute Fieldname: curr
Media Attribute Value: qos remote sendrecv
Media Attribute (a): des:qos mandatory local sendrecv
Media Attribute Fieldname: des
Media Attribute Value: qos mandatory local sendrecv
Media Attribute (a): des:qos mandatory remote sendrecv
Media Attribute Fieldname: des
Media Attribute Value: qos mandatory remote sendrecv
Figure 3-12 SIP 180 RINGING
180 RINGING
Session Initiation Protocol
Status line: SIP/2.0 180 Ringing
Status-Code: 180
Message Header
t: <sip:2208000@10.11.3.25;transport=sctp;user=phone>;tag=0-04-012-40007
-17b7
f: <sip:+18152207000@10.11.3.1;transport=sctp;user=phone>;tag=0-01-012-
0000f-17b5
i: 00003047-00020039-0002307b@LABM0
CSeq: 1 INVITE
v: SIP/2.0/SCTP 10.11.3.1:1;branch=z9hG4bK012001d.00000001
MIME-Version: 1.0
c: application/ISUP; version=ansi00
Content-Disposition: signal; handling=required
l: 4
ISDN User Part
Message type: ACM : Address complete message (6)
Backward Call Indicators: 0x1424
Mandatory Parameter: 17 (Backward call indicators)
.... ..00 .... .... = Charge indicator: No indication (0x0000)
.... 01.. .... .... = Called party’s status indicator: Subscriber free
(0x0001)
..01 .... .... .... = Called party’s category indicator: Ordinary
subscriber (0x0001)
00.. .... .... .... = End-to-end method indicator: No End-to-end method
SIP Message Examples
Call Flow
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3-46
Lucent Technologies 235-200-118
Issue 3.02B, March 2007