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IMPORTANT: Please read the following sections to determine which RC-2A mode works best for your application.
The RC-2A has two operational modes built in, called the Legacy and Alternative modes. The Legacy mode is the stan-
dard mode of operation that has existed in all previous versions of the RC-2A. The Alternative mode is a second mode
of operation that increases the RC-2A's flexibility in some applications. The operational mode you should use depends
on the exact application for the RC-2A. Here are some general guidelines, but in some applications, the opposite mode
may be needed (also see section B-C below describing the advantages and disadvantages of each operational mode):
Application Description
Use with a Viking W-1000, W-2000A, or W-3000
handsfree doorbox.
Use with a Viking E-30 or 1600A Series hands-
free phone.
On a dedicated telephone line or PBX extension
(no other phones on the same line or extension).
Wired across a telephone line in a residential appli-
cation (sharing the line with other phones), to con-
trol lights, door or gate.
Recommended Mode
Legacy Mode
(traditional software)
Alternative Mode
(new software)
Legacy Mode
(traditional software)
Legacy Mode
(traditional software)
Additional Programming
Set one code switch to D and set DIP switch 5
to OFF.
Set at least one code switch to B, set DIP switch
5 to ON and DIP switch 7 to OFF.
Set one code switch to C, set DIP switch 2 to
ON and DIP switch 5 to OFF.
Set DIP switch 5 to OFF and do not set any
code switches to C or D.
If you will be connecting the RC-2A to a telephone line or PABX extension (regardless of the mode you will be using),
the RC-2A is always monitoring the telephone line or PBX extension for the correct string of Touch Tones dialed. If the
correct string is detected, the RC-2A will operate the relay. For example, if you chose the Alternative mode, pro-
grammed a single digit relay command of "9" and installed the RC-2A onto a telephone line or PABX extension that is
shared with other telephones, there could be a problem. As the other phones are making outgoing phone calls, if they
dial a phone number that includes the digit "9", the RC-2A will operate it's relay. In these applications, you must either
use the Legacy mode and set a security access code (no rotary entry code switches set to D), or use the Alternative
mode and set at least one digit of the relay activation command to be either a "," or “#".
A. Choosing a Mode
B. Legacy Mode
1. Advantages
a. There are "latch" and "unlatch" relay commands (10 and 19).
b. There is a Touch Tone hang up command (8 or 18).
c. A wider range of ring delay selections for remote access (1, 2, 6, or 15 rings).
2. Disadvantages
a. When a security access code has been programmed (no code switches set to D), the complete digit string to
operate the relay is relatively long (6 digits total).
b. The relay activation commands are fixed in software (not programmable).
c. Limited "timed" relay activations available (5 seconds is the longest available).
C. Alternative Mode
1. Advantages
a. Shorter length relay activation commands (can be 1, 2, or 3 digits in length).
b. Wider range of timed relay activations available (up to 10 minutes maximum).
c. You can program the digits dialed to activate the relay.
2. Disadvantages
a. There are no "latch/unlatch" relay commands.
b. There is no Touch Tone hang up command.
c. Fewer ring delay selections for remote access (2 or 15 rings only).
3.
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