CX06833-3 View Datasheet(PDF) - Conexant Systems

Part Name

Description

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CX06833-3

SMXXD Modem

Conexant Systems 

1.4.2

1.4.3

1.4.3.1

1-6

CX06833-3x/4x SMXXD Modem Data Sheet

MCU Firmware

MCU firmware performs processing of general modem control, command sets, data

modem, error correction and data compression (ECC), fax class 1, fax class 1.0,

voice/audio/TAM/speakerphone, worldwide, V.80, and serial DTE/parallel host interface

functions according to modem models (Table 1-1).

MCU firmware can be customized to include OEM-defined commands, i.e.,

identification codes (I3), identifier string (I4), manufacturer identification (+GMI), model

identification (+GMM), and revision identification (+GMR), as well as code

mThoedimfiocdateimonf.irmware is provided in object code form for the OEM to program into

external ROM/flash ROM. The modem firmware may also be provided in source code

form under a source code addendum license agreement. External ROM/Flash ROM and

RAM must be installed in order to operate the modem with customized firmware.

Operating Modes

Data/Fax Modes

Data modem modes perform complete handshake and data rate negotiations. Using

modem modulations to optimize modem configuration for line conditions, the modem

can connect at the highest data rate that the channel can support from 56 kbps down to

2400 bps with automatic fallback.

In V.92/V.90 data modem modes (V.92 models), the modem can receive data from a

digital source using a V.92-compatible central site modem at line speeds up to 56 kbps.

With PCM upstream enabled (V.92 only), data transmission supports sending data at line

speeds up to 48 kbps. When PCM upstream is disabled, data transmission supports

sending data at line speeds up to V.34 rates. This mode can fallback to V.34 mode and to

lower rates as dictated by line conditions.

The following modes are supported in V.92 models when connected to a V.92-

compatible server supporting the feature listed.

• Quick connect: Allows quicker subsequent connections to a server by using stored

line parameters obtained during the initial connection.

• Modem-on-Hold: Allows detection and reporting of incoming phone calls on the

PSTN with enabled Call Waiting. If the incoming call is accepted by the user, the

user has a pre-defined amount of time of holding the data connection for a brief

conversation. The data connection resumes upon incoming call termination.

• PCM upstream: Boosts the upstream data rates. A maximum of 48 kbps is supported

when connected to a V.92 server that supports PCM upstream.

In V.34 data modem mode (V.92 and V.34 models), the modem can operate in full-

duplex, asynchronous modes at line rates up to 33.6 kbps. Automode operation in V.34 is

provided in accordance with PN3320 and in V.32 bis in accordance with PN2330. All

tone and pattern detection functions required by the applicable ITU or Bell standards are

supported.

In V.32 bis data modem mode, the modem can operate at line speeds up to 14.4 kbps.

In fax modem mode, the modem can operate in half-duplex, synchronous modes and can

support Group 3 facsimile send and receive speeds of 14400, 12000, 9600, 7200, 4800,

and 2400 bps. Fax data transmission and reception performed by the modem are

controlled and monitored through the EIA/TIA-578 Fax Class 1, or T.31 Fax Class 1.0

Conexant

102228A

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