D. Console Auxiliary Handset Jack
The HD-1 can be installed on your console’s auxiliary
handset jack. To eliminate the need for an additional
handset to inject the DTMF signal, simply move the
jumper on J6 (dummy phone load jumper) to positions
1 & 2 as shown below. Refer to Operation, section A
for operating instructions.
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A. Handset Interface
Due to the dynamic nature of the product design, the information contained in this document is subject to change without notice. Viking Electronics, and its affiliates and/or subsidiaries
assume no responsibility for errors and omissions contained in this information. Revisions of this document or new editions of it may be issued to incorporate such changes.
Fax Back Doc 405
ZF290995 Rev 3
Printed in the U.S.A.
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The Tip/Ring interface is an easy solution to the over attenuated Touch Tone output caused by certain consoles with built in AGC
(Automatic Gain Control) in their handset transmit circuitry. Connect Tip/Ring interface cord as explained in Installation section B.
The HD-1 can be used by simply going off-hook with your phone, and dialing on the HD-1.
B. Tip/Ring Interface
The HD-1 may require some volume and wiring protocol adjustments to function prop-
erly on your telephone. Start with the wiring protocol switch set to the “A” position.
Step 1. Make a test call to an in-house PABX extension.
Step 2. Enter several Touch Tones with the HD-1. The person on the
extension you called should hear loud clear Touch Tones.
Step 3. If Touch Tones are not heard, remove the back cover and slide the
wiring protocol switch to the “B” position and try again.
Step 4. If tones are still not heard, slide the wiring protocol switch to the “C”
position and repeat.
Step 5. If Touch Tones are severely distorted beyond what the volume control
can attenuate, move J5 to the “B” position and retry.
Step 6. If tones are still too distorted, move J5 to the “C” (maximum) position
and then fine tune with volume control.
Note: All outgoing calls must be dialed with your console’s keypad. Once the call is connected, you may use the HD-1.
The Talk Battery interface is used for any application where PABX or C.O. talk battery is not available or is too cumbersome to use.
It is ideal for creating a stand alone door/gate security keypad control when used in conjunction with Viking model RC-2A or RC-3.
For more information on Viking’s RC-2A, retrieve Fax Back Document 160. For more information on Viking’s RC-3, retrieve Fax
Back Document 165.
C. Talk Battery Interface
The HD-1 is equipped with a battery test circuit and LED indicator. The battery O.K. LED should light when a key on the keypad is
pressed. If the LED does not light, replace the 9V battery by removing the back cover. The average battery life is approximately 1
year.
D. Battery O.K. LED
(8 pages)
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