CL/SuperSession Support for IMS Session Services

At many sites, a number of users share a pool of PTERMs using a variety of port contention techniques. Periodically, these users receive messages from transactions scheduled by previous users. This can occur for a number of reasons, the most common being a premature terminal disconnection on a dial-in line.

When a terminal's connection breaks, messages generated during its transaction remain in the message queue until the session on that PTERM is re-established. However, dynamic selection of a communications path in the network may cause the user to reconnect on a different PTERM and LTERM. Consequently, the queued messages are not delivered. When the original PTERM is later assigned to another user, those messages are presented to the wrong user. The session cleanup and LTERM assignment services of CL/SuperSession support for IMS eliminate this problem.