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A. Power Fail or System Fail Bypass
After installation is complete, test the PF-6A by doing
one of the following:
1. Press and hold the TEST button
2. Move DIP switch 1 to the ON position
3. Disconnect power to the PF-6A
4. Provide a maintained normally open contact closure to
the EXTERNAL ALARM input
After installing and testing the PF-6A, instruct office personnel that in the event of the power failure or system failure
that the six assigned telephones will be the only means to receive and place calls.
While the PF-6A is in normal operating mode, the six C.O. lines are connected to the trunk inputs and the six
assigned station circuits are connected to their six telephones.
In the event of either a power failure or a major PABX alarm, the PF-6A will shift into the bypass mode. In this
mode, the six C.O. trunks are instantly connected to the six analog telephones designated, bypassing the
PABX/KSU.
Incoming calls will now ring directly to the telephones assigned to the six C.O. trunks. Outgoing calls may also be
made from each telephone, even on ground start lines.
When power is restored or the major alarm is cleared, the PF-6A will automatically switch back to normal operation.
Any C.O. trunk in use at this time will remain connected until the call is completed.
B. Ground to Loop Start Converter
The PF-6A can also be used as a ground start to loop start converter. This accommodates the installation of
telephony equipment requiring loop start lines (ie; key systems, call sequencers, answering machines, voice mail
systems, etc.), to ground start C.O. trunks. See Installation for proper wiring in this application.
In this application, the PF-6A will not pass disconnect supervision ("hang up" signals) to the loop start equipment.
When a hang up occurs, the PF-6A's ground start converter automatically "restarts" the line and dial tone is returned
to the loop start equipment. The loop start equipment will not detect any disconnect, as this "restart" occurs
immediately after the hang up. Typically this will cause the loop start equipment to not release the telephone line
when a caller abandons. Nothing can be done about this situation, as the PF-6A can not distinguish the difference
between this abandon condition and the loop start equipment going "off hook" to make an outgoing call.
Note: The PF-6A can ONLY be used to convert ground start lines to loop start. It can NOT convert loop start lines
to ground start.
Product Support Line...(715) 386-8666
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 # 680
Operation
DIP Switches
TEST Button
Maintained
Normally Open
Contact Closure
Printed in the U.S.A.
1
2
3
4
TEST
AUTOMATIC LINE
TRANSFER SWITCH
EXTERNAL
ALARM
VIKING
MODEL PF-6A
POWER
ACTIVE
Fax Back Line...(715) 386-4345
RJ21X
©
VIKING ELECTRONICS, INC. HUDSON, WI 54016
ZF301300 Rev A
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