selector channel การใช้

The System / 360 block multiplexor channel which could operate as a selector channel to allow attachment of legacy subsystems.
Equipped with selector channels and a multiplexer channel, the 70 / 25 could concurrently operate eight low-speed devices in addition to eight high-speed devices.
The computers were connected through selector channels on each host attached to channel-to-channel adapters, for an early form of short distance, point-to-point computer networking.
Later, for larger IBM System / 360 computers, and even for early System / 370 models, the selector channels and the multiplexor channels still were bulky and expensive separate processors, such as the IBM 2860 Selector channel ( one to three selector channels in a single box ), the IBM 2870 Byte multiplexor channel ( one multiplexer channel, and, optionally, one selector subchannel in a single box ) and the IBM 2880 Block multiplexor channel ( one or two block multiplexor channels in a single box ).
Later, for larger IBM System / 360 computers, and even for early System / 370 models, the selector channels and the multiplexor channels still were bulky and expensive separate processors, such as the IBM 2860 Selector channel ( one to three selector channels in a single box ), the IBM 2870 Byte multiplexor channel ( one multiplexer channel, and, optionally, one selector subchannel in a single box ) and the IBM 2880 Block multiplexor channel ( one or two block multiplexor channels in a single box ).