11
H.248 Signaling Procedures
The following part uses an example to illustrate a typical implementation of the
H.248 protocol. The diagrams of the call procedure abstractly display the interaction
between a media gateway and the media gateway controller instead of taking issues
like time graduation into account. The example is about a call set up between two
residential gateways. User A and User B are respectively connected to two residential
gateways RGW1 and RGW2, and the gateways are under the control of the same
media gateway controller. The example only describes a successful call, and it is
assumed that the gateways have registered on the media gateway controller. The
procedure is divided into two processes, namely call setup process and call backout
process.
