NEC Univerge SV8100 System Hardware Manual page 124

Issue 1.0
6.6
2 - 34
6.5.5 Series i Terminals
The voltage and current for the D
listed below:
Voltage: -11 ~ -48 Vdc
Maximum Current: 250 mA
Acoustical characteristics meet Electronic Industry
Association (EIA) standard proposal SP-1286 and
standard EIA RS-470.
Voltage, current, and ring signal information for Single Line Telephone
equipment, AP(A)-R Unit, and AP(R)-R Unit are the same a those listed
in the previous paragraph.
Dialing Specifications
6.6.1 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 SV8100/SV8300 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.
6.6.2 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 SV8100/SV8300
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
UNIVERGE SV8100/SV8300
term
Series i Multiline Terminals are
SV8100 System Specifications