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Summary of AMD modes and parameters
Syntax
mode , param1 : value , param2 : value2...
Example
amd = 1,qoff:0.40,log:1
Mode
Meaning
Description
0
Disabled
No AMD analysis (but the Call Progress parameter cp is used).
1
Filtering
Only “live” calls are through-connected to an interviewer; otherwise the amfile is played.
2
Calibration
Calls are connected in listen-only mode during AMD analysis; the result is reported in greet.
Name
Default
Unit
Description
Action if exceeded
Applies to
off
6.0
seconds
Max silence at start of call
Hangup QSAMP_NO_AUDIO
Filtering
coff
4.5
seconds
Max silence at start of call
Connect two-way audio
Calibration
max
1.15
seconds
Max greeting from human [1]
Hangup QSAMP_ANSMC
Filtering
on
60.0
seconds
Max greeting from AM
Play amfile to AM
Filtering
con
3.0
seconds
Max greeting measured
Connect two-way audio
Calibration
qoff
0.35
seconds
Qualification timer for end of voice [2]
Connect QSAMP_CONNECTED
Both
qam
2.9
seconds
Qualification timer for starting playback
Play amfile
Filtering
db
-34.0
dBm
Silence threshold (range -46 to -34 dBm) [3]
Start max timer
Both
log
0
0 or 1
If =1, report greet and silence times (milliseconds) in call.log [4]
 
Both
cp
 
 
Override dialer.ini call progress analysis completion criteria CpComplete [5]
 
All
[1] max recommended range from 0.9 seconds (aggressive, many false positives) to 2.1 seconds (conservative, many false negatives).
[2] qoff recommended range from 0.3 seconds (many false negatives) to 1.1 (detects most AM, but connects humans very slowly to an interviewer).
[3] db should be high (insensitive) to avoid detecting people in noisy environments as answering machines (false positives).
[4] log times are measured on the dialer PC and can differ slightly from the greet times measured by the DSP.
[4] log times are measured on the dialer PC and can differ slightly from the greet times measured by the DSP.
[5] cp should normally not be applied for AMD; the only relevant parameter is cp:-S. If persistent silence is detected, hangup call without playing amfile.
See also
Telephone - Dialing settings