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CX93010 UCMxx USB V.92/V.32bis Controllered Modem with CX20548 SmartDAA
1-2 Conexant Proprietary and Confidential Information 102627D
The CX93010 USB Modem integrates modem controller (MCU), modem data pump
(MDP), ROM, RAM, and SmartDAA system side device (SSD) functions onto a single
die.
Low profile, small QFN packages and reduced voltage operation with low power
consumption make this device set an ideal solution for V.92 modem USB adapters.
The modem operates by executing firmware from internal ROM and RAM. Customized
modem firmware and added/modified country profiles can be executed from internal
SRAM or serial EEPROM.
In V.92 and V.90 data modes, the modem can receive data at speeds up to 56 kbps from a
digitally connected V.92-compatible central site modem. A V.92 modem takes advantage
of the PSTN which is primarily digital except for the client modem to central office local
loop and are ideal for applications such as remote access to an Internet Service Provider
(ISP), on-line service, or corporate site. In this mode, the modem can transmit data at
speeds up to V.34 rates.
In V.34 data mode, the modem operates at line speeds up to 33.6 kbps.
In V.32bis data mode, the modem operates at lines speeds up to 14.4 kbps.
Data compression (V.44/V.42bis/MNP 5) and error correction (V.42/MNP 2-4) modes
are supported to maximize data throughput and data transfer integrity. V.44 is a more
efficient data compression than V.42bis that significantly increases downstream
throughput thus reducing the downlOAd time for the types of files associated with Internet
use, such as Web pages and uncompressed files such as graphics, image, audio, and
document files. V.44 data compression can achieve compression rates of more than 25%
over V.42bis. Typical compression ratio for V.44 on Web type data is approximately 6-1
resulting in overall effective data throughput rate up to 300 kbps for a 56 kbpsconnection.
V.44 data compression is not limited to the DTE rate since USB operates at
12 Mbps. Non-error-correcting mode is also supported.
In V.22bis fast connect mode, the modem can connect at 2400 bps with a very short
trAIning time, which is very efficient for small data transfers.
Fax Group 3 send and receive rates are supported up to 14.4 kbps with T.30 protocol.
V.80 synchronous access mode supports host-controlled communication protocols, e. g.,
H.324 video conferencing.
In TAM mode, enhanced 2-bit or 4-bit per sample coding schemes at 8 kHz sample rate
provide flexible format compatibility and allows efficient digital storage of voice/audio.
Also supported are 8-bit A-law, μ-law, and linear coding and IMA 4-bit ADPCM coding.
This mode supports applications such as digital telephone answering machine, voice
annotation, and recording from and playback to the telephone line.
In-band digital call progress enables the user to hear the call progress during modem
negotiation. This software-enhanced feature eliminates several external components
including an amplifier and a digital speaker. In-band digital call progress contributes to
lower BOM cost and smaller PCB size.
This data sheet describes the modem capabilities. Commands and parameters for the
modem are defined in the Commands Reference Manual (Doc. No. 102752).