VT AM enables the installation to establish and maintain the integrity of the data communication network. The installation can control sessions between application programs and terminals. The installation can also control access to data and the use of data within the network. VTAM provides a confidential text capability. The data on sessions defined by the user to contain confidential text is not included in buffer traces. Moreover, buffers containing confidential text are cleared before being returned to the buffer pool. User management is responsible for the selection, application, adequacy, and implementation of these features and for the appropriate application and administrative control.
Storage Requirements
NCP requirements for communication controller storage and processor disk storage on which the NCP can be installed for loading can be calculated using Network Program Products Planning, when available.
Hardware Requirements
NCP Version 3 requires One of the following communication controllers:
• A 3705-II Communications Controller
• A 3705-80 Communications Controller
• A 3725 Communication Controller.
SSP Version 2 Release 2 can operate in any processor that supports VTAM.
Programming Requirements
Compatibilities
SSP Version 2 Release 2 requires one of the following operating systems in the host processor:
• OS/VS2 (MVS) Release 3.8 (including SP 1.2 and SP 1.3)
• MVS/XA SP 2.1.
The full range of NCP Version 3 functions are available with the following programs:
• SSP Version 2 Release 2
• VTAM Version 2 Release 2.
If you are migrating from a PEP environment, you can use EP/3705 or EP/3725 with NCP Version 3 to support your BSC and start-stop terminals.
NCP Version 3 can also communicate with the programs listed below.
However, the full range of Version 3 functions may not be available when operating with these releases of program products.
• Other NCPs
NCP Version 1 Release 2.1 NCP Version 1 Release 3 NCP Version 2 (for the 3705) NCP Version 2 (for the 3725)
• Access methods
VTAM Version 1 Release 3 (OS/VS2 (MVS) only)
VTAM Version 2 Release 1 (OS/VS2 (MVS) and MVS/XA in compatibility mode only)
TCAM Version 2 Release 4
• NTO Release 2
• NRF
• X.25 Network Control Program Packet Switching Interface
• EP (Emulation Program) For the 3705 (EP/3705) For the 3725 (EP/3725)
• Non-SNA Interconnection (NSI) Release 1.
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NCCF
Storage Requirements
Requirements for host processor storage, including the Terminal Access Facility and the alias name translation facility, can be calculated using Network Program Products Planning, when available.
Hardware Requirements
NCCF runs in a virtual storage environment in any IBM host processor that satisfies the requirements of VT AM or TCAM.
Programming Requirements
Access Method VTAM Version 1 Release 3 VTAM Version 2 Release 1 VTAM Version 2 Release 2
TeAM Version 2 Release 4
NCCF runs with any operating system that satisfies the requirements of the level of VTAM or TCAM it is operating with. However, some functions are not available under certain access method releases. Figure 3-2 lists these functions.
Operator control sessions are not available for certain subsystems with the Terminal Access Facility. Figure 3-3 lists this support.
Version 1 NCCF Functions Version 2 NCCF Enhancements
All All except alias name translation
All All except alias name translation
All All
All except span of control All except alias name translation
Figure 3-2. NCCF Functions Available with VTAM and TCAM
Compatibilities
NLDM
DPPX Session Type
Access
Method Subsystem DPCX Operator Control FuliaScreen
CI"CS/VS X X
IMS/VS X X
VTAM HCF X X
X
TSO X
Remote NCCF X
CICS/VS X X
TeAM IMS/VS X X
Version 2
Release 4 DPPX X X
HCF
DPCX X
Figure 3-3. Subsystem Sessions Supported by the Terminal Access Facility
NCCF Version 1 commands are compatible with NCCF Version 2.
Command processors and exit routines you may have coded to run with NCCF Version 1 are source-code compatible with NCCF Version 2.
However, the code must be reassembled using the Version 2 NCCF macro library.
NCCF Version 2 will operate with NCCF Version 1 definition decks, providing equivalent function. NCCF Version 2 functions that require additional definition will not operate until defined.
Cross-domain communication is supported between NCCF Version 1 Release 2 and NCCF Version 2.
Storage Requirements
The NLDM virtual and disk storage requirements depend on the number and kinds of sessions traces, and the amount of session and response time data kept for each session traced. See Network Program Products Planning, when available, for storage estimates.
3-10 VTAM General Information
Hardware Requirements
NLDM may be run in any host processor supported by NCCF. An NLDM user may access the NLDM program product through any terminal supported by NCCF.
NLDM will monitor the response time of any response time monitor supported keyboard/display devices attached to the following SNA control units that support the RTM feature:
• 3274 Models 31A and 41A (local SNA)
• 3274 Models 31C, 41C, 51C, and 61C (SDLC/SNA only).
These control units must have the RTM feature installed and be running with the "C" or "D" microcode configuration. The RTM feature of the 3274 does not provide a mechanism for host data retrieval for non-SNA devices.
Programming Requirements
Compatibilities
NLDM Release 2 requires NCCF Version 2.
To obtain the new functions, NLDM Release 2 also requires the following programs:
• VT AM Version 2 Release 2
• NCP Version 3.
NLDM runs as an application program under NCCF. Refer to "NCCF" in this chapter for additional dependencies and prerequisites.
The response time data function of NLDM Release 2 requires:
• MVS/SP Version 1 for System/370
• MVS/SP Version 2 for System 370/XA (Extended Architecture) processors in 24 bit mode.
The SMF logging feature of NLDM Release 2 requires:
• MVS/SP Version 1.3.3 or higher for System/370 with an SMF SPE
• MVS/SP Version 2.1.1 or higher for System 370/XA with an SMF SPE.
Although NLDM Release 2 can run in a single-domain network with the programs listed below, the new functions are not available.
• VT AM Version 1 Release 3 (MVS only)
• VTAM Version 2 Release 1 (MVS only)
• TCAM Version 2 Release 4
• NCP Version 2 Release 1.
In a multiple-domain or SNA network interconnection environment, NLDM Release 2 cannot communicate with NLDM Release 1. An NLDM Release 2
cannot communicate with another NLDM Release 2, if either one is running under VTAM Version 1 Release 3 or any release of TCAM. When NLDM Release 2 is operating under TCAM, it only provides the functions available under NLDM Release 1.
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