When you use VTAM® common network services (VCNS) with the ES/9000 series communication adapter to send data across an X.25 packet switched data network, specify the VCNS=YES operand on the APPL definition statement. This allows sharing the physical connectivity of the communication adapter between SNA and VCNS data traffic.

You can use VCNS with the IBM® 3172 Nways interconnect controller to send data to a local area network. Specify VCNS=YES on the APPL definition statement to allow sharing the physical connectivity of the communication adapter between SNA and VCNS data traffic.