Panasonic KX-UDS124 Installation Manual page 12

2 Overview
SIP Signalling and Media Stream Control Overview
Moving while in standby mode
(1) The S-PS requests Location Registration from SIP-CS(1).
(2) SIP-CS(1) requests SIP Registration from the SIP server.
(3) The S-PS moves from coverage area of SIP-CS(1) to the coverage area of SIP-CS(2).
(4) The S-PS requests Location Registration from SIP-CS(2).
(5) SIP-CS(2) requests SIP Registration from the SIP server.
SIP registration is executed each time the S-PS performs location registration while it is idle.
Moving while talking
SIP/RTP
(1)
S-PS
(1) The S-PS requests Location Registration to SIP-CS(1), and then the S-PS starts the call.
(2) The S-PS moves from the coverage area of SIP-CS(1) to the coverage area of SIP-CS(2).
(3) The S-PS requests Location Registration to the SIP-CS(2).
(4) RTP is transferred from SIP-CS(1) to SIP-CS(2).
12 Installation Guide
(2) SIP (REGISTER)
SIP-CS(1)
(1)
S-PS
SIP Server
(4) RTP
(2) Handover
SIP Server
(5) SIP (REGISTER)
(3) Move
(3)
S-PS
SIP-CS(2)
(4)
S-PS
(7)
RTP
(5) Handover
(6)
S-PS