AudioCodes Mediant 600 - Fax; Modem Transparent with Events Mode; Fax; Modem Transparent Mode

SIP User's Manual 148 Document #: LTRT-83310
Mediant 600 & Mediant 1000
The Cisco gateway must include the following definition: "modem passthrough nse
payload-type 100 codec g711alaw".
To configure NSE mode, perform the following configurations:

IsFaxUsed = 0

FaxTransportMode = 2

NSEMode = 1

NSEPayloadType = 100

V21ModemTransportType = 2

V22ModemTransportType = 2

V23ModemTransportType = 2

V32ModemTransportType = 2

V34ModemTransportType = 2

BellModemTransportType = 2
12.2.2.6 Fax / Modem Transparent with Events Mode
In this mode, fax and modem signals are transferred using the current voice coder with the
following automatic adaptations:

Echo Canceller = on (or off, for modems)

Echo Canceller Non-Linear Processor Mode = off

Jitter buffering optimizations
To configure fax / modem transparent with events mode, perform the following
configurations:

IsFaxUsed = 0

FaxTransportMode = 3

V21ModemTransportType = 3

V22ModemTransportType = 3

V23ModemTransportType = 3

V32ModemTransportType = 3

V34ModemTransportType = 3

BellModemTransportType = 3
12.2.2.7 Fax / Modem Transparent Mode
In this mode, fax and modem signals are transferred using the current voice coder without
notifications to the user and without automatic adaptations. It's possible to use the Profiles
mechanism (see 'Coders and Profile Definitions' on page 215) to apply certain adaptations
to the channel used for fax / modem (e.g., to use the coder G.711, to set the jitter buffer
optimization factor to 13, and to enable echo cancellation for fax and disable it for modem).
To configure fax / modem transparent mode, use the following parameters:

IsFaxUsed = 0

FaxTransportMode = 0

V21ModemTransportType = 0

V22ModemTransportType = 0

V23ModemTransportType = 0

V32ModemTransportType = 0

V34ModemTransportType = 0