Audible Tones And Ringing Signal; Audible Tones; Ringing Signal; Built-In Modem On Mp Card - NEC NEAX2000 IVS2 General Description Manual

Chapter 8 System Performance

Audible Tones and Ringing Signal

Audible Tones

TONE
Dial Tone (DT)
Special Dial Tone (SDT)
Busy Tone (BT)
Reorder Tone (ROT)
Howler Tone (HWT)
Service Set Tone (SST)
Ring Back Tone (RBT)
Hold Tone (HDT)
Second Dial Tone
Call Waiting Ring Back Tone

Ringing Signal

Built-In Modem on MP Card

2
NEAX2000 IVS General Description
NDA-24293, Issue 2
Table 8-1 Specifications of Audible Tone
FREQUENCY
350 Hz mixed with 440 Hz
350 Hz mixed with 440 Hz
480 Hz mixed with 620 Hz
480 Hz mixed with 620 Hz
2,400 Hz interrupted by 16 Hz
350 Hz mixed with 440 Hz
440 Hz mixed with 480 Hz
480 Hz mixed with 620 Hz
440 Hz mixed with 480 Hz
440 Hz mixed with 480 Hz
Frequency:
Signal Voltage:
Interruption:
• 2 sec. ON,
4 sec. OFF (for external call)
• 1 sec. ON and
2 sec. OFF (for internal call)
MODEM:
20 Hz (Nominal)
75 Vrms (Nominal)
33.6 kbps
Audible Tones and Ringing Signal
INTERRUPTION
Continuous
0.125 sec. ON, 0.125 sec. OFF
0.5 sec. ON, 0.5 sec. OFF
2.5 sec. ON, 0.25 sec. OFF
Continuous
Continuous
1 sec. ON, 3 sec. OFF
0.25 sec. ON, 0.25 sec. OFF 0.25
sec. ON, 1.25 sec. OFF
0.25 sec. ON, 0.25 sec. OFF 0.25
sec. ON, 1.25 sec. OFF
1 sec. ON, 1 sec. OFF
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