Fax And Modem Capabilities; Fax/Modem Operating Modes - AudioCodes Mediant 800 User Manual

CHAPTER 15 Media
◆
d. Open the IP Profiles table, and configure the 'Echo Canceller' parameter to Acoustic (see
Configuring IP
e. Enable the Forced Transcoding feature (using the TranscodingMode parameter) to allow
the device to use DSP channels, which are required for acoustic echo cancellation.
The following additional echo cancellation parameters are configurable only through the
ini file:
●
●
●

Fax and Modem Capabilities

This section describes the device's fax and modem capabilities and corresponding configuration.
The fax and modem configuration is done in the Fax/Modem/CID Settings page.
●
●
●
➢
To access the fax and modem parameters:
■ Open the Fax/Modem/CID Settings page (Setup menu > Signaling & Media tab > Media
folder > Fax/Modem/CID Settings).

Fax/Modem Operating Modes

The device supports two modes of operation:
■ Fax/modem negotiation that is not performed during the establishment of the call.
'Max Reference Delay' (AcousticEchoSuppMaxRefDelayx10ms) - defines the
acoustic echo suppressor maximum reference delay
Profiles).
ECHybridLoss - defines the four-wire to two-wire worst-case Hybrid loss
ECNLPMode - defines the echo cancellation Non-Linear Processing (NLP) mode
EchoCancellerAggressiveNLP - enables Aggressive NLP at the first 0.5 second of
the call
Unless otherwise specified, configuration parameters mentioned in this section are
available on this page.
Some SIP parameters override these fax and modem parameters. For example, the
[IsFaxUsed] parameter and V.152 parameters in Section
For a detailed description of the parameters appearing on this page, see
Configuration Parameters
Mediant 800 Gateway & E-SBC | User's Manual
Reference.
- 159 -
V.152 Support.