CHAPTER68 Configuration Parameters Reference
Mediant 1000 Gateway & E-SBC | User's Manual
Parameter Description
■ 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”.
■ When housed with an analog/BRI module, the
devicecan 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.
configure voip > media
voice > echo-canceller-
hybrid-loss
[ECHybridLoss]
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
configure voip > media
voice > echo-canceller-
NLP-mode
[ECNLPMode]
Global parameter enabling Non-Linear Processing (NLP)
mode for echo cancellation.
You can also configure the feature per specific calls, using
Tel Profiles (TelProfile_ECNlpMode). For a detailed
description of the parameter and for configuring the feature
in the Tel Profiles table, see Configuring Tel Profiles.
Note: If the feature is configured for a specific Tel Profile,
the settings of the global parameter is ignored for calls
associated with the Tel Profile.
configure voip > media
voice > echo-canceller-
aggressive-NLP
[EchoCancellerAggressiveNLP]
Enables the Aggressive NLP at the first 0.5 second of the
call.
■ [0] = Disable
■ [1] = (Default) Enable. The echo is removed only in the
first half of a second of the incoming IP signal.
Note: For the parameter to take effect, a device reset is
required.
configure voip > media
RTP-RTCP > number-of-
SID-coefficients
[RTPSIDCoeffNum]
Defines the number of spectral coefficients added to an
SID packet being sent according to RFC 3389.
The valid values are [0] (default), [4], [6], [8] and [10].
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