MF tones preceding "number out of service" message

tone 1: 1100 and 1699 Hz approx 100 ms
tone 2:  700 and  899 Hz approx 70 ms
tone 3: 1100 and 1301 Hz approx 70 ms
tone 4: 1100 and 1301 Hz approx 70 ms
tone 5: 1301 and 1502 Hz approx 70 ms
tone 6: 1301 and 1504 Hz approx 70 ms
tone 7: 1301 and 1504 Hz approx 70 ms

SS7 decode (http://en.wikipedia.org/wiki/Signaling_System_No._5)

tone 1: C&F  13/code 13 keying prefix 1
tone 2: A&B  1
tone 3: C&D  6
tone 4: C&D  6
tone 5: D&E  0
tone 6: D&E  0
tone 7: D&E  0
tone 8: E&F  15/code 15 keying finish