ZyXEL Communications MSC1024G Series User Manual page 550

Chapter 18 VoIP
Table 289 H.248/MEGACO Call Procedure Example
DIRECTION
MGC --> MG1
MG1 --> Phone A
MG2 --> Phone B
Phone B --> MG2
MG2 --> MGC
MGC --> MG1
MGC --> MG2
MGC --> MG1
MGC --> MG2
Phone A --> MG1
MG1 --> MGC
MGC --> MG1
MGC --> MG1
MGC --> MG2
MGC --> MG2
18.1.4.4 H.248 and the IES
Configure each of the IES's H.248 interfaces to associate with a media gateway controller in
order to let subscribers make calls through the VOP MC cards.
• You can configure each of the IES's VOP1248G-61 cards as an SC or an MC in the VoIP
> VoIP H248 screen.
• Each IES H.248 interface requires specific information about a media gateway controller
with which it is to associate. This information is specified in an H.248 profile. Configure
H.248 profiles in the Profile > VoIP H248 screen.
• Configure the IES's H.248 interfaces in the VoIP > VoIP Interface screen. You must
specify the SCs, MCs, H.248 profile, MG details and other settings for the IES H.248
interface.
• Use the Port > VoIP H248 screen to manage and configure other VoIP settings of each
port on your H.248 line card(s).
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ACTION
MGC modifies Analog Termination on MG1 to send
ringing tone to phone A.
MG1 send ringing tone to phone A.
MG2 rings phone B.
User of phone B picks up. MG2 detects off-hook.
MG2 reports to MGC that phone B is off-hook.
MGC modifies analog Termination on MG1 to stop
playing ringing tone to phone A.
MGC modifies analog Termination on MG2 to stop
ringing phone B.
MGC modifies RTP Termination on MG1 to transfer
media with RTP Termination on MG2.
MGC modifies RTP Termination on MG2 to transfer
media with RTP Termination on MG1.
User of phone A finishes call and replaces receiver on
hook.
MG1 reports on-hook to MGC.
MGC removes MG1's RTP Termination from its
Context. The RTP Termination is ephemeral and is
destroyed.
MGC removes phone A's analog Termination from its
Context. The Context is destroyed. The analog
Termination is physical and returns to the Null Context.
MGC removes MG2's RTP Termination from its
Context. The RTP Termination is ephemeral and is
destroyed.
MGC removes phone B's analog Termination from its
Context. The Context is destroyed. The analog
Termination is physical and returns to the Null Context.
MSC1000G/1024G/1224G Series User's Guide
COMMAND
Modify
N/A
N/A
N/A
Notify
Modify
Modify
Modify
Modify
N/A
Notify
Subtract
Subtract
Subtract
Subtract