Tones and
ringing
8.1
Tones and ringing
Tone
Frequency
Cadence
Internal dial tone
440/350Hz +/-0%
Continuous
Engaged tone
425Hz
0.72
Sec. ON
0.72
Sec. OFF
Ring tone
425Hz
1111
1.26
Sec. OFF
0.54
Sec. ON
0.18
Sec. OFF
0.90
Sec. ON
Special dial tone
425Hz
11 11
1.26
Sec. ON
0.18
Sec. OFF
Warn tone
425Hz
II II
1.08
Sec. ON then OFF
Confirmation tone
425Hz
" "
0.18
Sec. ON
0.18
OFF
0.18
Sec. ON
0.18
OFF
0.18
Sec. ON
0.54
OFF
Number unobtainable
440Hz
Continuous
Ringing
Internal ringing
25Hz
1.08
Sec. ON
1.8
Sec. OFF
External ringing
25Hz
0.54
Sec. ON
0.18
Sec. OFF
0.54
Sec. ON
1.62
Sec. OFF
Internal fast ring
25Hz
0.36
Sec. ON
0.18
Sec. OFF
0.36
Sec. ON
0.54
Sec. OFF
8-1
TPU
1371
Issue
3 (4/91)
Summary of Contents for 2+8
Page 1: ...Installation and maintenance manual 2 8...
Page 2: ......
Page 36: ...Notes 10 2 Notes 10 3 TPU 1371Issue3 4 91...
Page 37: ...Notes TPU 1371Issue3 4 91 10 4...