Call Flow Of A Sip Call Originating From The Ont - Alcatel-Lucent 7302 Information Manual

5 — VoIP overview
Figure
5-14 November 2013
Figure 5-3 Call flow of a SIP call originating from the ONT
Phone
Off hook
Send dial tone or stutter tone
First digital dialed
Stop dial tone/stutter tone
Remaining digits dialed
Send ring back tone
Stop ring back tone
5-4 shows the call flow for a SIP call that is terminated at the ONT.
Alcatel-Lucent 7302 ISAM | 7330 ISAM FTTN | 7360 ISAM FX ONT R04.06.02
ONT
INVITE (collected digits)
PRACK
ACK
Speech path established
Edition 01
ONT Product Information Guide
Softswitch
100 TRYING
180 RINGING
200 OK (PRACK)
200 OK (INVITE)
18585
3FE 55873 AAAA TCZZA