Customers may have the ability to replace some of the z/OS® base functions with a commercially available product that provides similar functions. Contact an IBM® representative for qualification and pricing information. All z/OS integrated testing results and performance claims will be voided with such replacement.

The mechanism IBM uses for this accommodation is an alternate base configuration. One alternate base is defined and is supported by the price file and the configurator. This alternate base, which contains the base elements with IP Services (the component of base element Communications Server that provides TCP/IP networking) disabled, is available for customers who have a commercially available product that provides similar functions.

The alternate base, in addition to not supporting IP Services, does not support the optional feature Communications Server Security Level 3.