Dialing Specifications; Dial Pulse Address Signaling; Dual Tone Multifrequency (Dtmf) Address Signaling - NEC Univerge SV8100 System Hardware Manual

UNIVERGE SV8100
5.6

Dialing Specifications

5.6.1
5.7.2
System Hardware Manual
CHUYÊN CUNG CẤP TỔNG ĐÀI NEC

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 SV8100 system.
 Pulse Rate: 10 ± 0.5 pps/20 ± 1.0 pps
 Percent Break: 60 ± 1.5%
 Interdigit Interval: 0 pps/20 pps 770 ms. ~ 830 ms.
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 SV8100 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.
 Frequencies 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 5 ms.
 Duration of Dual Frequency Signal:
110 ms. default/60 ms. Minimum
Interdigital Time: 140 ms. default/45 ms. minimum
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