NEC NEAX NDA-24349 - Manual (Page 71)

Chapter 3 System Highlights
NEAX2000 IPS Request For Proposal (RFP) Reference Guide Page 3-19
NDA-24349 Issue 4
Rotary Dial Pulse and DTMF Signaling
(1) Rotary Dial Signal
Specifications
Description
Receiving Sending
Dial Speed 9 to 22 pps 10 pps +/- 0.8pps
20 pps +/- 0.8 pps
Break Ratio 55 to 77 % 67 +/- 3% or 62 +/- 3%
Inter-Digit Pause Min. 256 msec. 300 to 1,000 msec.(10 pps)
Switch-Hook Flash Detection 384 to 2,300 msec. Not applicable
(2) DTMF Signal
Specifications
Description
Receiving Sending
High Frequency Group 1,209Hz 1,336Hz 1,477Hz
697Hz 1 2 3
770Hz 4 5 6
852Hz 7 8 9
Signal Code
Low Frequency Group
941Hz * 0 #
Frequency Deviation +/- 1.8 % +/- 0.8 %
Signal Duration Min. 40 msec. 64 or 128 milli-sec.
Inter-Digit Pause Min. 40 msec. 32 to 240 msec.
Signal Level -46 to -5 dBm -10 dBm (low group)
- 8 dBm (high group)
Unwanted Frequency
Components Not Applicable 40 dB below the power of signal frequency