be supplied for the carrier and modulation frequencies for amplitude modulated tones that GENF generates. 3. Arguments shall be supplied that allow the frequency of a tone to be set in the range of 0 to 4000 Hz in 1 Hz units. 4. Arguments shall be supplied that allow the output power to be set in the range of +3 to -50 dBm in 0.5 dB steps. 5. Arguments shall be supplied that allow an amplitude modulated tone's modulation percentage to be set in the range of 0 to 300% in 1% units. 6. The tone duration (make time) shall be specified in 1 ms units. Tone durations shall be specified in the range of 0 to 8191 ms. Software License D2 Technologies, Inc. and Maintenance Agreement August 4, 1997 CONFIDENTIAL 26 7. An unlimited tone duration shall be specified by setting the make duration to -1. 8. The silence duration between tones (break time) shall be specified in 1 ms units. Silence durations shall be specified in the range of 0 to 8191 ms. 9. An unlimited silence duration shall be specified by setting the make duration to -1 and setting both frequencies of a dual tone to 0 Hz. 10. The GENF module shall allow tones to be generated that meet or exceed EIA/TIA-464 requirement for DTMF and call progress tone generation. 11. The GENF module shall allow tones to be generated that meet or exceed CCITT Blue Book Volume VI Fascicle VI.4 recommendations Q.310-Q.490 requirements for MF R1 and R2 tone generation. 12. The GENF module shall generate tones with one to three unique cadence pairs (on/off pairs). A.4.2 Performance Requirements 1. Frequency accuracy shall exceed 1 Hz. 2. Level accuracy shall exceed 0.5 dB. 3. Timing information shall exceed 1 ms accuracy. A.5 Universal Tone Detector