Dip Switch S2 - Black Box TE120A User Manual

3.2 DIP Switch S2

DIP switch S2 controls both the unit number (if you'll be daisychaining Caller ID
units) and the serial communication characteristics of the RS-232 OUT and RS-232
IN ports (see Section 2.3) and the unit number (if you will be daisychaining Caller
ID units). (All of the possible settings of S2's switch positions that aren't listed
below are invalid—do not use unlisted settings, because they could disable or
damage attached equipment.)
Use positions 1 and 2 to set the data rate of the RS-232 OUT port:
• 1 OFF, 2 OFF: 1200 bps.
• 1 ON, 2 OFF: 2400 bps.
• 1 OFF, 2 ON: 4800 bps.
• 1 ON, 2 ON: 9600 bps (factory-default setting).
Use position 3 to set the data bits of the RS-232 OUT port:
• 3 OFF: 7 data bits.
• 3 ON: 8 data bits (factory-default setting).
Use positions 4 and 5 to set the parity of the RS-232 OUT port:
• 4 OFF, 5 OFF: No parity (factory-default setting).
• 4 ON, 5 OFF: Odd parity.
• 4 OFF, 5 ON or 4 ON, 5 ON: Even parity.
Use positions 6, 7, and 8 to set the unit number: "1" for a single unit or "1," "2,"
etc., for daisychained units successively closer to the DTE. For example, if you have
three 4-Line units in a daisychain, you must set the one farthest from the DTE as
unit #1, the one in the middle as unit #2, and the one attached to the DTE as #3.
(However, if you'll have 4-Line and 8-Line units in the same daisychain, see the
Note at the start of Chapter 4.) The possible settings are:
• 6 OFF, 7 OFF, 8 OFF: Unit is #1 (factory-default setting).
• 6 ON, 7 OFF, 8 OFF: Unit is #2.
• 6 OFF, 7 ON, 8 OFF: Unit is #3.
.• 6 ON, 7 ON, 8 OFF: Unit is #4.
• 6 OFF, 7 OFF, 8 ON: Unit is #5.
• 6 ON, 7 OFF, 8 ON: Unit is #6.
• 6 OFF, 7 ON 8 ON: Unit is #7.
• 6 ON, 7 ON, 8 ON: Unit is #8
CHAPTER 3: Configuration
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