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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 cir-
cuits 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.
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POWER
VIKING
©
MODEL PF-6A
VIKING
ELECTRONICS
HUDSON, WI 54016
AUTOMATIC LINE
TRANSFER SWITCH
POWER
13.8VAC
ACTIVE
TEST
1 2 3
O
N
O
F
F
EXTERNAL
ALARM
EXTERNAL
ALARM
DIP SWITCH
1 2 3
TEST
RJ21X
1 2 3
ON
OFF
DIP
Switch
1
1
2
2
3
3
Position
OFF
ON
OFF
ON
OFF
ON
Description
Normal operation
Bypass mode for testing
Assigns lines 1, 2, 3 to loop start
Assigns lines 1, 2, 3 to ground start
Assigns lines 4, 5, 6 to loop start
Assigns lines 4, 5, 6 to ground start
A. Power Fail Bypass Unit
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.
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
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 680
ZF301300 Rev B
Printed in the U.S.A.
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C.O. Lines
PABX
Before System Outage
POWER
VIKING
©
MODEL PF-6A
VIKING
ELECTRONICS
HUDSON, WI 54016
AUTOMATIC LINE
TRANSFER SWITCH
POWER
13.8VAC
ACTIVE
TEST
1 2 3
O
N
O
F
F
EXTERNAL
ALARM
EXTERNAL
ALARM
DIP SWITCH
1 2 3
TEST
RJ21X
C.O. Lines
PABX
PF-6A
After System Outage
