DLOGMOD

Specifies the source of the logon mode name to be used when CA XCOM Data Transport initiates a session to a remote LU.

VTAM: Indicates that CA XCOM Data Transport will initiate sessions with single‑session‑capable LUs using SIMLOGON or REQSESS where the NIB LOGMODE=X'00', requesting that the VTAM SSCP owning the LU obtain the session parameters from the MODTAB and DLOGMOD VTAMLST associated with that LU and return them to CA XCOM Data Transport via the logon exit CINIT or SCIP BIND RU.
XCOM: CA XCOM Data Transport will initiate sessions with single‑ or parallel‑session‑capable LUs using SIMLOGON or REQSESS with the NIB LOGMODE set equal to the LOGMODE parameter from the destination member, if any, or from the Default Options Table.

Default: VTAM

Notes:

DLOGMOD=VTAM is ignored by parallel‑session LUs, and non‑SNA service manager sessions use “XCOM” as the value of DLOGMOD. SNA service manager CNOS sessions are initiated with a logmode of SNASVCMG, as required by LU 6.2 protocol.
The logmode name usually returned to the VTAM logon exit in the CINIT RU or in the SCIP exit in the BIND RU is used to construct the mode name user vector in the bind as required by LU 6.2 session establishment. If the mode name is not available in the CINIT or BIND RU control vectors X'0D' or X'2D' the LU 6.2 mode name is set from the LOGMODE parameter of the enabled destination member, if any, associated with the LU or from the Default Options Table.
Note that while the LU 6.2 protocol does not require that the VTAM logmode name match the LU 6.2 mode name, CA XCOM Data Transport currently assumes that they do match and sets the LU 6.2 mode name in bind user vector X'02 to match the VTAM logmode.