Configuration of channel adapters (CAs) for a maximum of four host
connections, optionally with data streaming protocol.
High-performance transmission subsystem (HPTSS) with SDLC high-speed
lines (1.5 Mbps with T1 clear channel or 2 Mbps with CEPT clear channel).
Direct memory access (DMA) with DMA bus, allowing the high-performance
transmission subsystem (HPTSS) to work efficiently by transferring data directly
to or from main storage.
Selective scanning, ensuring increased flexibility for LIC configurations and
reduced scanning load. Only the LICs with active connected lines are scanned.
Usability
The 3745 design contains a user access area. Access to such areas enables the
user to install, remove, or repair devices (line interface couplers and cables) while
the controller is operating (hot pluggability). The LIC can be plugged or unplugged
without disturbing the scanner or impairing the network.
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At 3745 initial installation, IBM service will do the standard cable installation,
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connection, and testing. IBM service will also install LIC MES cables at user
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request. After 3745 initial installation, the user can install and connect external
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cables, except channel cables.
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Network IPL operations are now easier with a shorter execution time. The timed
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IPL function allows restarting a large network, or part of it, including several nodes,
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at a scheduled time, from one port of this network. See also “Automatic Control
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Program Load” on page 3-4.
Enhanced load module operation allows the operator to transfer and save the
control program load modules on the hard disk. This operation and the replacement
or purge of a load module already stored on disk are executed in a nondisruptive
manner. The controller will continue to run and the currently-running load module
will not be affected. The user can select the load module to be used for controller
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initialization from the host or from the 3745 console. The rename load module
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function allows renaming of the MOSS disk active module and the standby module.
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This renaming can be initiated from any VTAM console in the network.
More usability is offered for channel adapter control. The channel adapters can be
enabled or disabled from the 3745 operator console at any time. Also, the native
and emulated subchannel address range can be set from the 3745 operator
console. This capability avoids the need to use hardware jumpers to set these
options.
Increased usability is available for setting the speed of direct-attached lines. The
MOSS uses the speed defined in the control program load module.
Enhanced MOSS functions provide the user with improved tools for error detection
and failure isolation. Problem determination facilities and controller services under
user control contribute to better serviceability and usability. The menu design of
the MOSS functions at the 3745 console eases using the MOSS functions.
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IBM 3745 Models 130, 150, 170: Introduction
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