
Telecommunication Peripheral Products
Technical Practice
RAD-INTL
International Call
Back Kit
May 12, 1999
Provide International Call Back
Why use a service bureau? Now you can own your own “International Call Back” unit!
By installing the RAD-AMP/RAD-INTL
combination in the United States on a
Centrex line or C.O. line with “Call
Transfer” features, dramatic savings can
be realized over calls originating from
foreign countries.
When your foreign office calls the RAD-AMP and hangs up in less than five rings, the
RAD-AMP immediately calls back. If the line is busy, the unit redials until a connection
is made. Your foreign office can then enter a security code plus the number to be
dialed at U.S telephone rates. When the call is transferred, the RAD-AMP is free to
accept new calls. The “call back” number can also be changed remotely to allow
roaming capabilities.
http://www.VikingElectronics.com
VIKING©
E-mail...Sales@VikingElectronics.com
Features Specifications
• Audio amplifier
• Roaming capability
• Programmable security code
• Remote night switch capability
• Busy and ring detection
• Non-volatile memory (No batteries required)
• Programmable access code
• 20 digit phone number memory
Made in the U.S.A.
Description: One 18 pin microcontroller chip
Note: For complete specifications on the RAD-AMP, retrieve
Fax Back Document 415.
Important: When using the RAD-INTL software, this
technical practice must be used for all programming and
installation instructions.
Sales...(715) 386 - 8861
Installation
Replace the existing software in the RAD-AMP with the RAD-INTL software by following steps 1-8 below.
Important: Electronic components are sensitive to static electricity.
Personnel and the work area should be grounded before handling the
RAD-AMP and its components.
1. Be sure that the AC power and the phone line have been
disconnected.
2. Remove the two phillips screws on the bottom of the unit.
3. Remove the top half of the chassis.
4. Carefully remove the Micro. by prying it out of the socket.
5. Install the new Micro. into the socket, with the indent
(notch) in the direction as shown in the Diagram 1.
6. Move jumper JP1 to position shown.
7. Reinstall the chassis cover and replace the two screws.
8. Reconnect AC power and phone line.
Diagram 1
JP1
258288 REV D

Note: The RAD-AMP must be programmed before normal operation. For normal operation the front panel switch should
be set to the ON position and the remote night switch contacts must be open.
Diagram 2
Programming Examples Enter
Set busy retry count to 3 3
Set Access code to 456789 456789#46
Set call back number 1 715 386 8861#00
Optional Night Mode Remote Switch
Q
U.S. Centrex
“Call Transfer” Line
or
Rear View of RAD-AMP
LINE IN LINE OUT
REMOTE
SWITCH
12
USE ONLY LISTED
CLASS 2 POWER
SOURCE 12V DC
500mA MAXIMUM
Programming
To access programming, call into the RAD-AMP. After the RAD-AMP answers and a single beep is heard, enter the
security code. The security code has been factory set to 845464 (V-I-K-I-N-G). The RAD-AMP will beep twice
indicating that programming has been accessed. Alternatively, programming can be accessed by allowing the RAD-
AMP to call you back. After a beep is heard, enter a “Q” followed by the security code.
Notes: It is recommended that the factory set security code be changed. While programming, if 20 seconds elapse
between Touch Tones, the RAD-AMP will disconnect. All valid Touch Tone programming sequences are acknowledged
with a double beep. A triple beep indicates that a mistake has been made.
Programmable Features Digits Programmable Features Digits
Set no busy retry .............................................
Set busy retry count to 1 ..................................
Set busy retry count to 3 ..................................
Set busy retry count to 7 ..................................
Set busy retry count to 15 ..................................
Alert tones enabled .........................................
Alert tones disabled ..........................................
Double flash on busy .........................................
Single flash on busy........................................
Q 1
Q 2
Q 3
Q 4
Q 5
Q 9
Q 0
Q 7
Q 8
Security code (6 digits, 0-9) ........................................
Access code (6 digits, 0-9) ..........................................
Note: Access code must be different than security code
Call back number (1-20 digits) .....................................
To enter a “Q” in the call back number .....................
To enter a “#” in the call back number .....................
To enter a pause in the call back number ................
Factory Default Setting
Can NOT be the first digit in the dialing string
#47
#46
#00
Q Q
Q #
Q 7
Operation
When an inbound call of less than 5 rings is detected, the RAD-AMP will automatically call the preprogrammed phone
number. If the line is busy, the RAD-AMP will redial that number a programmable number of times. To stop busy
redialing before the programmable parameter is met, answer the call, enter a Touch Tone Q, and hang up. When the
call back has been answered, a beep is provided every 7 seconds as a prompt to enter a Q followed by a six digit
access code or the security code for programming. If 90 seconds elapses without a valid code being entered, the RAD-
AMP will disconnect. If the correct access code has been entered, the RAD-AMP will beep twice as a prompt for a
phone number to be entered. If the phone number is not entered within 20 seconds, the RAD-AMP will disconnect.
When a phone number has been entered, the RAD-AMP will flash and dial the phone number. If the RAD-AMP detects
a ring at the phone number, the RAD-AMP will hang up to connect the two parties. If the phone number dialed by the
RAD-AMP is busy, the unit will flash and beep twice for “busy” notification. A new number may then be entered if
desired.
To program a “one time only” roaming call, allow the RAD-AMP to answer and enter the access code without a
preceding “Q”. The RAD-AMP will beep once prompting the user to enter a roaming phone number. Enter the number
you wish the unit to dial and hang up. The RAD-AMP will then disconnect and call the new phone number.
Note: A Q, #, or a pause can NOT be the first digit in the roaming dialing string.
Product Support Line...(715) 386-8666 Fax Back Line...(715) 386-4345
Due to the dynamic nature of the product design, the information contained in this document is subject to change without notice. Viking
Electronics, its affiliates and/or subsidiaries assume no responsibility for errors and/or omissions contained in this information. Revisions of
this document or new editions of it may be issued to incorporate such changes.
Fax Back Doc # 831
Printed in the U.S.A.
ZF300780 Rev A