Black Box TE120A, User Manual

19

CHAPTER 3: Configuration

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