AudioCodes Mediant 1000 User Manual page 1021

User's Manual
Parameter
Echo Canceler
configure voip > media voice >
echo-canceller-enable
[EnableEchoCanceller]
Max Echo Canceller Length
configure voip > media voice >
max-echo-canceller-length
[MaxEchoCancellerLength]
configure voip > media voice >
echo-canceller-hybrid-loss
[ECHybridLoss]
configure voip > media voice >
echo-canceller-NLP-mode
[ECNLPMode]
Version 7.2
Note: If this functionality is configured for a specific profile, the
settings of this global parameter is ignored for calls associated
with the profile.
Global parameter enabling echo cancellation (i.e., echo from voice
calls is removed).
You can also configure this functionality per specific calls, using IP
Profiles (IpProfile_EnableEchoCanceller) or Tel Profiles
(TelProfile_EnableEC). For a detailed description of the parameter
and for configuring the functionality, see ''Configuring IP Profiles''
on page 393 or Configuring Tel Profiles on page 428.
Note: If the functionality is configured for a specific profile, the
settings of this global parameter is ignored for calls associated
with the profile.
Defines the maximum Echo Canceler Length (in msec), which is
the maximum echo path delay (tail length) for which the echo
canceller is designed to operate:

[0] Default = (Default) Based on various internal device settings
to attain maximum channel capacity

[11] 64 msec

[22] 128 msec
Note:

For the parameter to take effect, a device reset is required.

Using 128 msec may reduce channel capacity. For example:
with DSP Template 0 and number of spans 4, the capacity is
reduced from 120 to 100. The reduction depends on the
combination of "DSP Template" and "Number of Spans". For
accurate figures, see Channel Capacity on page 1187.

When housed with an analog/BRI module, the device can use a
max. echo canceller length of 64 msec.

When housed with PRI TRUNKS module, the device can use a
max. echo canceller length of 128 msec.

When housed with an MPM (in Slot #6), no channel reduction
occurs.

It is unnecessary to configure the parameter
EchoCancellerLength, as it automatically acquires its value
from the parameter.
Defines the four-wire to two-wire worst-case Hybrid loss, the ratio
between the signal level sent to the hybrid and the echo level
returning from the hybrid.

[0] = (Default) 6 dB

[1] = N/A

[2] = 0 dB

[3] = 3 dB
Global parameter defining the echo cancellation Non-Linear
Processing (NLP) mode.
You can also configure the functionality per specific calls, using
Tel Profiles (TelProfile_ECNlpMode). For a detailed description of
the parameter and for configuring the functionality in the Tel
Profiles table, see Configuring Tel Profiles on page 428.
1021
62. Configuration Parameters Reference
Description
Mediant 1000B Gateway & E-SBC