Howto:SIP Media Negotiation - Details
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Applies To
This information applies to
- all innovaphone products
V6 Sr1-hotfix2
More Information
This information applies to firmware 6.00 sr1-hotfix2 IPxxx[07-60600.18] (or higher)!
Call Setup
Forward Negotiation
- INVITE with SDP-Offer
- 180 Ringing
- 200 OK with SDP-Answer
- ACK
Note: 180 Ringing does not contain an SDP-Answer!
Forward Negotiation with Early Media
- INVITE with SDP-Offer
- 183 Session Progress with SDP-Answer
- 180 Ringing with SDP-Answer
- 200 OK with SDP-Answer
- ACK
Note: 180 Ringing contains an SDP-Answer!
Reverse Negotiation
- INVITE
- 180 Ringing
- 200 OK with SDP-Offer
- ACK with SDP-Answer
Reverse Negotiation with Early-Media
- INVITE
- 183 Session Progress with SDP-Offer
- PRACK with SDP-Answer
- 180 Ringing
- PRACK
- 200 OK with SDP-Offer
- ACK
Re-Negotiation on an established call
Forward Negotiation
- INVITE with SDP-Offer
- 200 OK with SDP-Answer
- ACK
Reverse Negotiation
- INVITE
- 200 OK with SDP-Offer
- ACK with SDP-Answer
Related Articles
Howto:SIP Reverse Negotiation - Call Transfer