Telephone Line Emulator User’s Manual
40-400-00020, Rev. M 32
First Cadence off time may be set from 100 mS to 1000 mS in 5 mS increments.
Second Cadence on time may be set from 100 mS to 1000 mS in 5 mS increments.
Second Cadence off time may be set from 100 mS to 1000 mS in 5 mS increments.
If the Second Cadence values are programmed to zero the unit will repeat the sequence
with the first cadence values.
Ringing
Ringing is the AC voltage that is applied to a Line to alert a device to an incoming call. A
minimum ring signal (according to Bellcore) is 40 VAC RMS at 1 REN. The variable
parameters available in the TLE include Ring Frequency, Voltage Level, and Cadence.
Ring Cadence is programmable for each of the three groups of Telephone Numbers in 1,
2, or 3 On/Off sequences (a.k.a. Ring Cycle, Ringing Period). Telephone numbers 1, 2,
and 3 are set on the Phone Numbers screen.
Figure 20. Ringing Screen
Ringing - Lines 1, 2, 3, 4
Ring frequency may be set from 17 Hz to 70 Hz in 1 Hz increments. Ring voltage may be
set from 20 Volts AC RMS to 80 Volts AC RMS in 5 Volt increments.
The actual ring voltage seen at T/R will depend on (REN) ringer equivalence of the load.
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