Voice Enhancement Features for Cisco IOS Release 12.4(24)T
Information About Voice Enhancement Features for Cisco IOS Release 12.4(24)T
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Cisco AS5350XM and Cisco AS5400XM Universal Gateways Software Configuration Guide
Analog Centralized Automated Message Accounting (CAMA) signaling protocols per National
Emergency Number Association standards. This feature supports 20-digit Automatic Number
Identification (ANI) requirements and mapping of remote party IDs (RPID) to PANI.
For more information, refer to the
Enhanced MF for FGD and Analog CAMA Trunks
document.
Call Progress Analysis
To enable answering machine detection for contact center applications, an enhanced call progress
analysis (CPA) function for the Outbound Option Dialer is implemented in Cisco IOS
Release 12.4(24)T. The answer machine and answer machine terminating tone detection algorithm is
ported from the IPCC Dialer into the PVDM2 DSP voice feature card (VFC) and ISR PVDM2 DSP. The
fax/modem detection portion uses existing logic in the PVDM2 DSP.
This feature is enabled by the following Cisco IOS commands in voice service voip configuration mode:
•
cpa
[
threshold
|
timing
]
The basic command enables the call progress analysis algorithm for all outbound VoIP calls in
the voice gateway. If you select one of the optional keywords, you can specify other parameters
for CPA threshold values and CPA timing values.
•
cpa threshold
:
–
cpa threshold
active signal
{
9db
|
12db
|
15db
|
18db
|
21db
}
This command sets the threshold of an active signal. If a signal is greater than the measured
noise floor level specified in this command, a signal is considered active. The default value is
15 db.
–
cpa threshold noise-level max
{
-45dBm0
|
-50dBm0
|
-55dBm0
|
-60dBm0
}
This command sets the maximum threshold that the CPA algorithm uses to measure the noise
floor level. If the measured noise floor level is greater that the vlaue specified in this command,
the measured noise floor level is set to the configured maximum noise floor level. The default
value is –50 dBm0.
–
cpa threshold noise-level min
{
-55dBm0
|
-60dBm0
|
-65dBm0
|
-70dBm0
}
This command sets the minimum threshold that the CPA algorithm uses to measure the noise
floor level. If the measured noise floor level is less than the value specified in this command,
the measured noise floor level is set to the configured minimum noise floor level. The default
value is –60 dBm0.
•
cpa timing
(in milliseconds):
–
cpa timing live-person
1
...
60000
This command sets the timing that the CPA algorithm uses to determine whether or not a call is
answered by a live person. The default value is 2500 ms.
–
cpa timing noise-period 1
...
60000
This command sets the maximum time that the CPA algorithm uses to meaure the noise floor
level at the beginning of a call. The default value is 100 ms.
–
cpa timing silent
1
...
60000
This command sets the minimum silent duration after active speech is detected in order for the
CPA algorithm to determine that a call is answered by a live person. The default value is 375 ms.
–
cpa timing term-tone
1
...
60000
