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.
DOD# 408 ZF301290 Rev BPrinted in the U.S.A.
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The relay contacts located at terminal positions 5,6 and 7,8 can be set for normally open (N/O ) or normally
closed ( N/C) by repositioning JP1 and JP2 respectively.
B. Relay Contact Selections
A. Ring Detection Only
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With the LDB-2 in the ring detection mode, incoming ring will activate two relay contacts. The contacts can be inde-
pendently configured to be either normally open or normally closed. Once ringing is detected it will remain activated
for an adjustable time of 2-6 seconds. During the activation time, if ringing stops, the relay will remain activated for the
balance of the set time.
B. Ring and Loop Detection
With the LDB-2 in the ring and loop detection mode, incoming ring will activate two relay contacts. The contacts can
be independently configured to be either normally open or normally closed. Once ringing is detected it will remain acti-
vated for an adjustable time of 2-6 seconds. During the activation time, if ringing stops, the relay will remain activated
for the balance of the set time. Additionally, the LDB-2 will detect an off-hook condition. If the device goes off-hook at
any time, either with or without ringing, the relay will activate and remain activated for the duration of the off-hook con-
dition.
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Affordable ADA Compliant Emergency Phones
Surface and Flush Mount Handsfree Doorboxes
Now you can answer your door or gate from the safety of your telephone!
The W-1000 (flush mount) and W-2000A (surface mount) doorboxes are
designed to be installed on the unused telephone line input of nearly any
phone system. One or two doorboxes can also share an existing residen-
tial phone line when used in combination with a C-1000B doorbox con-
troller.
When the “Call” button is pressed, the doorbox generates a standard ring
cadence for an adjustable number of rings. To converse with the visitor, the
inside party simply answers the call from the phone of their choice. For more information, retrieve DOD# 170.
If no ring detection is required (loop detection only), clip R2 as show in the diagram on page 3. R2 is a 4.7K ohm resis-
tor that is mounted vertical on the board. (For use with 0.0 REN loading only.)
C. Disabling Ring Detection
The 1600A Series ADA Compliant Emergency Phones are designed to
provide quick and reliable handsfree communication for any standard
analog telephone line or analog phone system station port. All 1600A
Series phones meet ADA requirements for elevator/ emergency
telephones, and can be programmed from any Touch Tone phone.
The phones can dial up to 5 programmable emergency numbers,
as well as 2 central station numbers.
The 1600A Series phones are available in a variety of
styles to suit any application. For more information,
retrieve DOD# 215.
(4 pages)
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