Dialing Specifications; Dial Pulse Address Signaling; Dual-Tone Multifrequency (Dtmf) Address Signaling - NEC Univerge SV9100 System Hardware Manual

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Issue 3.0
6.7
SV9100 System Hardware Manual

Dialing Specifications

6.7.1

Dial Pulse Address Signaling

Dial Pulse Address Signaling uses dial pulses (regular momentary
interruptions) to signal the equipment. The following Dial Pulse
specifications are used In the UNIVERGE SV9100 system.
Pulse Rate: 10 ± 0.5 pps/20 ± 1.0 pps
Percent Break: 60 ± 1.5%
Interdigit Interval: 0 pps/20 pps 770ms. ~ 830ms.
6.7.2

Dual-Tone Multifrequency (DTMF) Address Signaling

DTMF signaling includes push button or Touchtone dialing. When a key on
a telephone is pushed, two tones (one high frequency and one low
frequency) are provided. In the UNIVERGE SV9100 system, the following
DTMF specifications are used.
Frequencies
Two sinusoidal frequencies are provided, one from the high frequency
group and one from the low frequency group.
Frequency Deviation: Less than ±1.5%
Signal Level:
Nominal level per frequency: -6 ~ -4 dBm
Minimum level per frequency
Low Group: -10 dBm
High Group: -8 dBm
Maximum level per frequency: 0 dBm
Rise Time: Within 5ms.
Duration of Dual Frequency Signal:
110 ms. default/60ms. minimum
Interdigital Time: 140ms. default/45ms. minimum
2-35

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