Notes to Users  | Network Planning Information  | 
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Table A-3(continued) 
Tones/ | 
  | Frequency  | Cadence  | Meaning  | 
Signal to:  | 
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  | 1.  | 20Hz  | 0.4s On 0.2s Off 0.4s On 3s Off  | Ringing Signal Internal  | 
  | 2.  | 20Hz  | 1s On 3s Off  | Ringing Signal Internal  | 
  | 3.  | DTMF A  | 80 or 160mS  | Voice Mail Answer  | 
  | 4.  | DTMF D  | 80 or 160mS  | Voice Mail Disconnect  | 
2 Wire extns  | 5. DTMF B | 80 or 160mS  | Voice Mail Recall  | |
  | 6.  | MWI Signal  | 0.9 ON/0.1s Off  | Message Waiting Signal  | 
  | 7.  | 20Hz  | 1s On 1 S Off  | Recall Ringing Signal  | 
  | 8.  | 1209Hz  | 2 bursts 0.16s On twice then 3s Off  | External Call waiting  | 
  | 9.  | 1209Hz  | 2 bursts 0.5s On twice then 3s Off  | Internal Call waiting  | 
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  | 1.  | 350/440Hz  | Continuous  | Dial Tone  | 
  | 2.  | 400(T1), 350/440Hz(T2)  | 4 bursts of 0.125s   | DND Stutter Dial Tone  | 
  | 3.  | 350/440Hz  | 5 bursts of 0.1s 3s On  | MW Stutter Dial Tone  | 
  | 4.  | 400/450Hz  | 0.4s On, 0.2s Off 0.4s On 2s Off  | Ringing Back Tone  | 
  | 5.  | 400Hz  | 0.375s On/0.375s Off Repeated  | Normal Extension Busy  | 
  | 6.  | 400Hz  | 0.375s On/0.375s Off Repeated  | |
Internal  | 7.  | 400Hz  | 0.375s On/0.375s Off Repeated  | NU/Reorder Tone  | 
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general  | 8.  | 440Hz  | 1s On  | Executive override  | 
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  | 9.  | 350/440Hz  | 3 bursts of 0.1s  | Entry Tone  | 
  | 10. 1209Hz(T1), 500Hz(T2)  | Operation rejected. In call  | ||
  | 11. 350/440Hz  | 3 bursts of 0.125s  | Operation accepted In call  | |
  | 12. 2000Hz  | 2 bursts of 0.125s  | Progmg Operation accepted  | |
  | 13. 2000Hz  | 0.75s On  | Prgmg Operation rejected  | |
  | 14. 350/440Hz  | 1s On 2s Off Repeated  | CFD stutter dial tone  | |
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Strata CTX   |