Types Of Ringing Supported; Ringing Configuration - Nortel DMS-100 Series General Description Manual

3-14 Ringing in Series II peripherals
Ringing generator control
The LCM is provisioned with two ringing generators. Each unit of the LCM
can connect to either ringing generator. The SWRG command available at the
MAP terminal switches a unit or both units from one ringing generator to the
other.
LCM processors monitor status bits from the ringing generators. If a problem
is detected, system software attempts to resolve any trouble condition by a
variety of methods including switching ringing generators.
Ringing generator capacity
The LCM continuously monitors the output current of the ringing generators
and reacts when the current exceeds a predetermined threshold. The number of
lines that the ringing generator can ring simultaneously is not restricted to a
fixed value. The actual number depends on the number of ringers attached to
each line and the length of the subscriber loop.

Types of ringing supported

The LCM support the following types of ringing:
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Note: 20 Hz single party ringing, distinctive ringing and teen ringing are
patterns applied by the software to a particular output of the ring generator.
Frequency selective ringing, coded ringing and superimposed ringing are
addressed through switch settings.
Ringing configuration
The LCM ringing system consists of the following components:
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297-1001-131 Standard 06.01 October 2000
20 Hz single party
superimposed ringing
frequency selective ringing
coded ringing
distinctive ringing
teen ringing
LCM processor card (NT6X51)
ringing generator (located on NT6X30)
ringing amplifier (located on NT6X30)
power converter (NT6X53)
bus interface controller (NT6X54)
digroup controller (NT6X52)
line card