Black Box PROTOCOL CONVERTER A/S-4 - Manual (Page 11)

PROTOCOL CONVERTER MODEL A/S-4
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3.4 Power Transformer
The A/S-4 is shipped with a transformer for the standard USA 110-VAC outlet plug. A substitute
transformer may be ordered for the for 220 VAC or other voltages. A conversion plug for different
power outlets is the responsibility of the purchaser.
3.5 Synchronizer
The A/S-4 has a unique feature on the modem port to allow the A/S-4 to run SDLC over asynchronous
modems, therefore providing a low cost dial up system. This is possible by the use of a hardware
synchronizer circuit that derives clocks from the data. To use this feature, set the modem port switches
as listed in Section 4.0 for an Asynchronous Modem.