Interpreting the contents of the NMROUT field

The contents of the NMROUT field at offset X'0D' are determined by examining the following bits in NMRFLAG at offset X'00':

NMRFLAGW -- 2 bits into NMRFLAG
NMRFLAGT -- 3 bits into NMRFLAG
NMRFLAGU -- 4 bits into NMRFLAG

Use the following table to determine the contents of NMROUT:

Table 1. Interpreting the NMROUT Field
NMRFLAGW	NMRFLAGT	NMRFLAGU	NMROUT Contents
0	0	0	MCS routing codes for the message.
0	0	1	The console identifier.
0	1	0	Userid.
1	0	0	The remote workstation identifier.
1	1	0	Userid/remote workstation identifier. (NMRout type)

If NMRFLAGW and NMRFLAGT are both set, the origin node could not determine whether the value of NMROUT is an interactive userid or a remote workstation identifier. In these cases, the destination node must determine the source so they can transmit to the proper location.

JES3 checks the Console Status Table (CST) for a match with a remote workstation identifier. If one is not found, the source is presumed to be a TSO/E userid.

JES3 issues an IATXCNDB macro to determine if a remote console with the given name exists. If a console with the specified name does not exist, the source is presumed to be a TSO/E userid.