Viking lsr-1 Service Manual

Telecommunication Peripheral Products

Technical Practice

LSR-1

Line Seizure Relay

May 21, 2002

Your Emergency Device can Share a

Line with Your Phone System

Why pay for a dedicated line for your
elevator/emergency phone or alarm panel?

The LSR-1 Line Seizure Relay allows the
user to share an existing phone line with an
emergency phone or other priority alarm
device. This can save hundreds of dollars a
year over leasing a dedicated phone line.

The LSR-1 can be used on any C.O. line or
analog PABX/KSU station.

Important: When the emergency device is in use, the phone line is not available for
normal use. Any additional emergency calls will have to be made on another phone
line. For this reason the LSR-1 is not recommended for single line applications.

Note: Connecting more than one set of microphone and speaker combinations to the LSR-1
may infringe on US Patent 5,386,463.

VIKING©

http://www.VikingElectronics.com

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Features Applications

• Interrupts any call in progress and returns fresh
dial tone to the emergency phone

• Modular connections for easy installation

• Operates on any 12 - 32V DC power source

• 12V DC adapter provided

• During power outages the line is connected
directly to the emergency device

• Off hook detection LED for emergency device
port

• Handy test button to simulate an emergency
device off hook

• Emergency phones in elevators, hallways,
parking ramps, etc.

• Security systems or alarm panels with dialers

• Cash machines, credit card readers or any other
device that requires instant access to a phone
line

Sales...(715) 386 - 8861

Specifications

Made in the U.S.A.

Power: 120V AC/12V DC, 500mA UL listed adapter provided
Dimensions: 119mm x 36mm x 71mm (4.7” x 1.4” x 2.8”)
Shipping Weight: .45 kg (1 lb)
Environmental: 0°C to 32°C (32°F to 90°F) with 5% to 95% non-

condensing humidity

Talk Battery: 32V DC
Connections: (2) RJ11 jacks, (1) RJ11 plug

PABX/KSU
Trunk Port

Installation/Programming

C.O. Line or analog

PABX/KSU station

LSR-1

1600 Series

Emergency Phones

(not included)

Once installed, test the installation by following steps 1 - 6 below:

1. Make an outbound call on the device connected to the STD PHONE port.

2. While maintaining the first call come “off hook” with the device connected to the EMERG PHONE port. The first call
should be interrupted and the device connected to the EMERG PHONE port should receive fresh dial tone.

3. Hang up the devices on both ports.

4. Call the line attached to the LSR-1 and verify that ring is passing to the STD PHONE port.

5. Unplug power to the LSR-1.

6. Come off-hook with the device connected to the EMERG PHONE port and verify that the dial tone is returned.

Note: Due to the two second access time for fresh dial tone, emergency phones should be programmed with a 4 second

pause in the beginning of the dialing string.

Fax Back Document 215

Operation

The LSR-1 Line Seizure Relay allows a standard phone line, analog PABX station, or Centrex loop start line to be
shared with an emergency phone, alarm system or any other telecom device that needs instant access to a phone line.
When the emergency device comes off hook, the line is disconnected for two seconds to access fresh dial tone, then
reconnected to the emergency device.

The LSR-1 connects the incoming phone line to the device connected to the STD PHONE port. The EMERG PHONE
port is supplied with internally generated 32V DC talk battery. When an “off hook” condition is sensed at the EMERG
PHONE port, an internal relay breaks the connection to the STD PHONE and holds both devices off the line simulating a
two second hang up. Another relay then connects the EMERG PHONE to the incoming line. The emergency device
receives fresh dial tone and is now able to dial out.

All incoming calls are routed to the STD PHONE port unless power is removed from the LSR-1. To program or call into a
device connected to the EMERG PHONE port, disconnect the power to the LSR-1 and call into the unit.

Product Support Line...[phone] Fax Back Line...[phone]

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.

Printed in the U.S.A. ZF300300 Rev DFax Back Doc # 230