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CHAPTER 3: Installation
9
3. Installation
3.1General Installation
The A/S-4’s options are set by the operator through the use of menus and switches. The A/S-4 provides
a very flexible package of options so as to work with any terminal or terminal emulating device (such as a
personal computer). Due to the great numbers of options provided, it may take a little time to set up
the A/S-4 unit, however once complete, the options need not be set up again. All options are battery
protected for when the unit is turned off.
The A/S-4 uses external switches and easy to use menu driven Set up features.
The A/S-4 is shipped from the factory ready to run with no changes if a DTE device (VDU, Personal
Computer, etc.) is attached to the A/S-4’s terminal port and the A/S-4’s modem port is connected to a
synchronous modem for dial up SDLC. If this is not your application, only a few switches need be
changed. Refer to Section 4.0 for switch settings of other devices.
To install the A/S-4:
1. Connect cables to devices.
2. Plug in the A/S-4.
3. Type “S” on VDU for automatic speed detection of 300, 1200, 1800, 2400, 4800, or 9600 baud
to obtain A/S-4 menus.
4. Follow A/S-4’s menus.
If you have an odd baud rate not listed, refer to Section 4.0 for setting switches for terminal baud rate. If
the menus do not appear, refer to Section 13.0 for trouble shooting problems and odd installations.
3.2 Modem Interface
The modem port can be configured for several types of hardware communications. The A/S-4 is
shipped with the options set for the RS232C EIA standard. The modem port can be configured for
NRZI for some IBM installations by setting the switch on the rear of the A/S-4 unit to the NRZI position.
3.3 Terminal Automatic Speed Detection
The A/S-4 has the necessary hardware and software for speed detection on the terminal port. This
option makes it possible to install a A/S-4 without changing a switch. Baud rates of 300, 1200, 1800,
2400, 4800, or 9600 can be detected on power up of the unit. After applying power, the operator types
“S” or SNA on the terminal and the baud rate of the VDU is detected and a power up message is sent to
the terminal. The “S” may be in lower or upper case, even, odd, or no parity. Switch 5 of switch bank S9
must be OFF to enable this feature to work properly. The A/S-4 is shipped with this feature ready to
work.