DSP reports leading and trailing edge in the 8 ms block that they are detected. MF events are not buffered. Software License D2 Technologies, Inc. and Maintenance Agreement August 4, 1997 CONFIDENTIAL 39 A.6.2 R1 Detection Performance requirements: Table A- 13 consists of MF R1 tone detection performance requirements taken from CCITT/ITU Q310-Q331 and Bellcore TR-NWT-000506. Also shown is D2's MF R1 performance requirements, which is a superset of the CCITT and Bellcore requirements. - ------------------------------------------------------------------------------------------------------------------ Requirement - ------------------------------------------------------------------------------------------------------------------ Characteristic Bellcore CCITT/ITU D2 - ------------------------------------------------------------------------------------------------------------------ Frequency Deviation +/-(1.5% + 5 Hz) must +/-1.5% must accept Configurable choice of accept three sets of must accept frequency tolerance: +/-(1.5% + 5 Hz), +/-(1.5% + 10 Hz), +/-(1.5% + 15 Hz) - ------------------------------------------------------------------------------------------------------------------ Tone Duration KP signal >/= 54 ms >/=30 ms must accept Minimum duration is must accept; must reject steps, from 28 ms up. All others: >/=30 ms Can be configured for must accept; /=30 ms must accept; must reject - ------------------------------------------------------------- ----------------------------------------------------- Minimum Interdigital Must accept Must accept Minimum interdigital Interval interdigital intervals interdigital intervals interval is configurable >/=25 ms. Must bridge >/=20 ms in 4 ms steps. Can be interdigital intervals configured for >/=20 ms - ------------------------------------------------------------------------------------------------------------------ Minimum Cycle Time Up to 10 pulses per - >10 pulses per second second (100 ms cycle ( time) - ------------------------------------------------------------------------------------------------------------------ Accept Levels 0 to -25 dBm must - Minimum power is accept configurable from -25 frequency - ------------------------------------------------------------------------------------------------------------------ Twist (ratio of high group power to low) accept accept accept - ------------------------------------------------------------------------------------------------------------------ SNR (white noise) 20 dB - 20 dB - ------------------------------------------------------------------------------------------------------------------ Impulse Noise Fewer than 14 missed - Fewer than 14 missed or split digits in or split digits in Bellcore Impulse Noise Bellcore Impulse Noise Tape No. 201 Tape No. 201 - ------------------------------------------------------------------------------------------------------------------ Software License D2 Technologies, Inc. and Maintenance