V.90/K56flex Modem Device Sets with SmartDAA Technology for Low Power Applications

SmartACFL

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Doc. No. 100444A

Conexant

5

Proprietary Information

Data/Fax Modes

In V.90/K56flex data modem mode, the modem can

receive data from a digitally connected central site

modem (CSM) at line speeds up to 56 kbps.

Asymmetrical data transmission supports sending

data up to V.34 rates; this mode can fallback to full-

duplex V.34 mode, and to lower rates as dictated by

line conditions.

In V.34 data mode, the modem operates at line

speeds up to 33.6 kbps. Error correction (V.42/MNP

2-4) and data compression (V.42 bis/MNP 5)

maximize data transfer integrity and boost average

data throughput up to 230.4 kbps. Non-error-

correcting mode is also supported.

Data modem modes perform complete handshake

and data rate negotiations. Using V.34 modulation to

optimize modem configuration for line conditions, the

modem can connect at the highest data rate that the

channel can support from 33600 bps down to 2400

bps with automatic fallback. 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 standard are supported.

In V.32 bis mode, the modem operates at line

speeds up to 14.4 kbps.

In V.22 bis fast connect mode, the modem can

connect at 2400 bps with a very short training time,

which is very efficient for small data transfers.

In fax modem mode, the modem can operate in 2-

wire, half-duplex, synchronous mode 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, T.30 Fax Class 1.0, or Fax

Class 2 command interface. Full HDLC formatting,

zero insertion/deletion, and CRC

generation/checking are provided. Both transmit and

receive fax data are buffered within the modem. Data

transfer to and from DTE is flow controlled by

XON/XOFF and RTS/CTS.

Synchronous Access Mode (SAM) - Video

Conferencing

V.80 Synchronous Access Mode between the

modem and the host/DTE is provided for host-

controlled communication protocols, e.g., H.324

video conferencing applications.

Voice-call-first (VCF) before switching to a

videophone call is also supported.

Worldwide Operation

The modem operates in US/Japan/Canada/TBR21

and other countries. Country dependent parameters

for functions such as dialing, carrier transmit level,

calling tone, call progress tone detection, answer

tone detection, blacklisting, and relay control are

programmable by ConfigurACE II for Windows.

SmartDAA technology allows a single PCB design

and single BOM to be homologated worldwide.

Advanced features such as digital PBX protection

are also supported.

TAM Mode

TAM Mode features include 8-bit

µ-Law, A-Law, and

linear coding at 8 kHz sample rate. Full-duplex voice

supports concurrent voice receive and transmit.

Tone detection and generation, call discrimination,

and concurrent DTMF detection are also supported.

ADPCM (4-bit IMA) coding is supported to meet

Microsoft WHQL logo requirements.

TAM Mode is supported by three submodes:

1.

Online Voice Command Mode supports

connection to the telephone line or, for the S

model, a handset.

2.

Voice Receive Mode supports recording voice or

audio data input from the telephone line or, for

the S model, a microphone/handset.

3.

Voice Transmit Mode supports playback of voice

or audio data to the telephone line or, for the S

model, a speaker/handset.