Sensaphone 1800 - Manual (Page 27)

Chapter 2: Installation
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The 1800 will automatically charge the battery whenever the power
switch is turned on and the power transformer is plugged in. The
unit also includes special circuitry to prevent the battery from being
damaged in the event of an extended power outage. The battery
should provide about 5 years of service before needing replacement.
See Appendix B for battery replacement instructions.
The 1800 also includes a 3V lithium battery to retain the date and
time when main power is off. The lithium battery should provide 8-
10 years of service life.
NOTE: Have batteries serviced by qualified service
personnel only.
TELEPHONE LINE
Connect the 1800’s Phone jack to a standard 2-wire analog phone
line. The unit dials using pulse or tone, with loop start only. The
1800 will recognize ringer frequencies from 16 to 60 Hz and will
operate with all standard analog telephone systems that accept pulse
or tone dialing.
Certain private telephone systems and public switching equipment
may not accept the unit’s dialing or may generate an unacceptable
ring signal. In those cases, a dedicated line may be required for the
unit. Consult the supplier of your telephone system if you encounter
problems.
CAUTION: Never install telephone wiring during a
lightning storm. Never install telephone jacks in wet
locations unless the jack is specifically designed for
wet locations. Never touch uninsulated telephone wires
or terminals unless the telephone line has been dis-
connected at the network interface. Use caution when
installing or modifying telephone lines.
Line Seizure
Line seizure gives the 1800 the ability to “seize” the telephone line
when it needs to dial out. For example, if an emergency occurs
which puts the 1800 in alarm mode, the unit will be able to dial
out even if a telephone has been left off the hook. To the right
of the LINE terminals is another set of terminals labeled EXT.