Key features of IBM VTAM for VSE/ESA and VM/ESA V4.2.0
Three functional levels of support
VTAM for VSE/ESA and VM/ESA V4.2.0 offers three packaging options or functional levels of support—each available at an attractive price. From the entry-level VTAM Client/Server to VTAM InterEnterprise, choose the functional level of support that fits your needs.
VTAM Client/Server for entry-level networking
Client/Server is suited to an entry-level networking environment. This environment is typically smaller and does not require the communications capabilities of larger networks. Client/Server supports APPN in addition to many traditional and new SNA subarea capabilities.
VTAM MultiDomain for additional capabilities
MultiDomain contains all of the functional capabilities of Client/Server plus the addition of network control program (NCP) ownership and more APPN and SNA subarea capabilities.
VTAM InterEnterprise for large networks
For customers that have large networks, or need interconnection to other network providers, there is a third functional level known as VTAM InterEnterprise. InterEnterprise supports APPN border node for both VM and VSE and SNA Network Interconnection (SNI) for VM. Additional capabilities in APPN and SNA subarea functions are also provided.
VTAM 31-bit I/O buffer support
This enhancement alleviates previous storage constraints, allowing z/VSE customers to grow their communication workloads by moving I/O buffers (IOBUF pool) and all I/O CTC packing buffers in 31-bit System Getvis storage (VTAM startup option IOBUF31=YES).