Routing path
IMS passes messages from the local system to the remote system on a routing path. One or more IMS systems can be included in a routing path.
In the following figure, IMS B has a path to IMS A and back (path BA). Similarly, back-and-forth paths exist between IMS B and IMS D (path BD), IMS B and IMS C (path BC), and IMS A and IMS D (path AD). A path can go through an IMS in order to get to another IMS, such as path CAD between IMS C and IMS D. More than one path can exist between the same two IMS systems. IMS C and IMS D have two direct paths, CD1 and CD2, in addition to the indirect path CAD.
A total of 2036 paths are allowed in one MSC network.
