Sip Responses; 1Xx Response--Information Responses - Nortel 1120E Administration Manual

110 SIP messages supported by the IP Phone 1120E
PRACK Yes
MESSAGE Yes
UPDATE No

SIP responses

The following SIP responses are also supported:
•
•
•
•
•

1xx Response--Information Responses

1xx Response
100 Trying
180 Ringing
181 Call is being
forwarded
182 Queued
183 Session progress
Copyright © 2008, Nortel Networks
.
No support for PRACK-specific early-media negotiation
scenarios
1xx Response--Information Responses
2xx Responses--Successful Responses
3xx Response--Request Failure Responses
4xx Response--Server Failure Responses
6xx Response--Global Responses
Send Receive
Yes Yes
Yes Yes
No Yes
No Yes
No Yes
SIP Firmware Release 1.1 for IP Phone 1120E Administration
NN43112-300 02.03 Standard
Comments
The IP Phone 1120E can generate
this response for an incoming INVITE
if it has taken too long to generate
a 180 response. Upon receiving
this response, the IP Phone 1120E
waits for a 180 Ringing, 183 Session
Progress, or 200 OK responses.
The IP Phone 1120E begins local
ringing through the active transducer.
See 183.
See 183.
The IP Phone 1120E accepts a
183 response with SDP to allow for
early-media negotiation.
27 May 2008