Specifying the alternate PCB mask

An alternate program communication block (PCB) mask contains three fields.

The following table describes these fields, the field length, and in which environment the field applies.

Table 1. Alternate PCB mask
Descriptor Byte Length DB/DC DBCTL DCCTL DB Batch TM Batch
Logical terminal name 1 8 bytes X   X    
Reserved for IMS 2 2 bytes X   X    
Status code 3 2 bytes X   X    
Note:
  1. Logical Terminal Name

    This field contains the name of the logical terminal, LU 6.2 descriptor or the transaction code to which you want to send the message.

    Related reading: For more information on LU 6.2, see IMS Version 15.5 Communications and Connections.

  2. Reserved for IMS

    This 2-byte field is reserved.

  3. Status Code

    This field contains the 2-byte status code that describes the results of the call that used this PCB most recently.