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A number of products that Systech has produced in the past are no longer in production. We periodically get requests asking what these products are, if we still sell them, if manuals are available, and how to get them repaired. This web page is a brief description of some of these products.
Etherplex
The Etherplex product line is a family of Ethernet accelerator host adapters. These products were designed to offload a Unix host from the burden of managing a large number of incoming or outgoing telnet sessions to ethernet terminal servers. A device driver on the host machine makes the connections to the terminal servers appear as local tty ports on the host.
The standard product (2MB) supported up to 128 or 256 users. The larger (8MB) product supported up to 2048 users.
The Systech models consisted of primarily the following:
- NTX-8023 - VME host adapter, available with 2MB or 8MB RAM
- NTX-8023-EISA - EISA (not ISA) host adapter, available with 2MB or 8MB RAM
- NTX-8023-MC - Microchannel host adapter, available with 2MB or 8MB RAM
- NTX-8023-PCI - PCI host adapter, available with 2MB or 8MB RAM
The Unplug (HPS) Family
The Unplug product line is a series of products designed to allow you to add up to 128 or 256 serial ports per host adapter to a Unix host machine. Most of the Unplug systems consisted of a host adapter that plugged into the host system and a series of one or more cluster controllers. The clusters are attached to the host adapter via Arcnet (a coax based network). A device driver on the host machine makes the serial ports on the cluster controllers appear as local tty (or hty) ports on the host.
One variation of the Unplug product line was a "multiplexer" product which was essentially the host adapter and a cluster controller combined into a single board, allowing you to add 8 or 16 serial ports to a host system.
The Systech models consisted of primarily the following:
Host Adapters
- HPS-6840 - Multibus I host adapter
- HPS-6940 - Multibus I host adapter
- HPS-6945 - VME host adapter
- HPS-6240 - Multibus I host adapter (higher performance)
- HPS-6245 - VME host adapter (higher performance)
- HPS-6270 - EISA host adapter (not ISA)
- HPS-6270-20 - EISA host adapter (not ISA) (higher performance)
- HPS-6280 - Microchannel host adapter (not ISA)
Cluster Controllers - All RS232
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HPS-7080, HPS-7082, HPS-7088 - the original cluster controllers, DB-25, 8 port, 8 plus parallel port, and 16 port.
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HPS-7080-020,7082-020, 7088-020 - DB-25, downloadable, 8 port, 8 plus parallel port, and 16 port.
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HPS-7080-030, 7082-030, 7088-030 - DB-25, downloadable, 8 port, 8 plus parallel port, and 16 port.
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HPS-7916, HPS-7917, HPS-7932, HPS-7933 - configurable, downloadable, available in a broad range of port types and numbers. 16 and 32 ports, DB-25 and RJ-45, with and without printer.
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HPS-2008, HPS-2016 - "Unplug II", downloadable, in a plastic case, RJ-45 only.
Multiplexers
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- HPS-6237 - VME 16 port multiplexer, with Parallel port
Miscellaneous
- HPS-5580, HPS-5581, HPS-5582 - SPUR - Arcnet repeater, with 0, 1 or 2 fiber optic connections
- HPS-6237 - VME 16 port multiplexer, with Parallel port
- HPS-3320 - Diagnostic unit
The Unplug systems were sold worldwide directly from Systech and through a number of OEMs. In many cases the cluster controllers were "private labeled" with the OEMs logo and/or company name. Because of this they may appear with other names on various systems. Some of these are called "DTC" products.
MTI
This was a family of Multibus I 8 and 16 port multiplexers. They consisted of a controller that plugged into a Unix system and a 19-inch USART box with the serial ports.
The Systech models consisted of primarily the following:
- MTI-800 - 8 port Controller and USART
- MTI-850 - 8 port Controller and USART, no cover
- MTI-1600 - 16 port Controller and USART
- MTI-1650 - 16 port Controller and USART, no cover
DCP
This was a family of 4 port communication controllers for Multibus I and VME. They consisted of a controller that plugged into a Unix system and could be used with various communication protocols, including bisynch, X.25, etc.
The Systech models consisted of primarily the following:
- DCP-8804 - Multibus I
- DCP-8820 - VME
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