Advertisement
ringing
Tones and
Tones and ringing
8.1
Tone
Internal dial tone
Engaged tone
Ring tone
Special dial tone
Warn tone
Confirmation tone
Number unobtainable
Ringing
Internal ringing
External ringing
Internal fast ring
8-1
Frequency
440/350Hz +/-0%
425Hz
425Hz
1111
425Hz
11 11
425Hz
II II
425Hz
" "
440Hz
25Hz
25Hz
25Hz
Cadence
Continuous
Sec. ON
Sec. OFF
0.72
0.72
1.26
Sec. OFF
0.54
Sec. ON
Sec. OFF
Sec. ON
0.18
0.90
1.26
Sec. ON
0.18
Sec. OFF
Sec. ON then OFF
1.08
0.18
Sec. ON
0.18
OFF
0.18
Sec. ON
0.18
OFF
Sec. ON
OFF
0.18
0.54
Continuous
1.08
Sec. ON
1.8
Sec. OFF
Sec. ON
Sec. OFF
0.54
0.18
Sec. ON
Sec. OFF
0.54
1.62
0.36
Sec. ON
0.18
Sec. OFF
Sec. ON
Sec. OFF
0.36
0.54
1371
TPU
3 (4/91)
Issue
Advertisement
