This read-write value tells the PXM controller whether this connection should be treated as a Virtual Path Connection or a Virtual Channel Connection, though the CESM card itself does not use this distinction and always reports/sets it to vcc(2). An administrator configuring a CES connection can generally leave this at its default vcc(2) value, since the setting exists for PXM's benefit across other card types rather than for any CESM-specific behavior. Seeing anything other than vcc(2) on a CESM channel would be unexpected given the card's fixed behavior described here.