APPC/IMS and LU 6.2 terminal support

APPC/IMS does not use an LTERM for input. APPC/IMS provides two facilities (that are similar to LTERMs) for determining output destinations: LU 6.2 descriptors and side information.

LU 6.2 descriptors allow an IMS LTERM name to define an LU 6.2 destination (specifying LUNAME, TPNAME, and other LU 6.2 destination characteristics). These LU 6.2 LTERMs can be used the same way as regular LTERMs in IMS application programs.

Side information contains system-defined values provided by CPI Communications (CPI-C), and supplies LU 6.2 destination information. For APPC/IMS to establish a conversation with a partner program, CPI-C requires initialization information, such as the name of the partner program and the name of the LU at the partner's node. CPI-C provides a way to use system-defined values for these required fields. These system-defined values are specified in the side information, and are accessed by a symbolic destination name. The symbolic destination corresponds to an entry in the side information containing the partner_LU_name, the mode_name, and the TP_name.

Related reading: For more information on side information, symbolic destination names, and the entries in the side information, see z/OS® MVS Planning: APPC/MVS Management.