This message is part of a group of messages that VTAM® issues in response to a DISPLAY ID command for a type 2.1 PU, a VRTG-capable CDRM, a GROUP (XCA) that is part of a connection network, or a LINE (NTRI) that is part of a connection network, or DISPLAY ADJCP command. The first message in the group is IST1105I. See the explanation of that message for a complete description.