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RS56L-PCI Datasheet(数据表) 4 Page - List of Unclassifed Manufacturers

部件型号  RS56L-PCI
说明  Host-Processed V.90/K56flex™ Modem Device Family for Mobile Applications
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制造商  ETC2 [List of Unclassifed Manufacturers]
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RS56L-PCI Datasheet(HTML) 4 Page - List of Unclassifed Manufacturers

 
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Description
General
The RS56L-PCI modem provides the processing core for
a complete system design featuring data/fax modem,
voice/TAM, cellular phone, and speakerphone support,
depending on specific model (Table 1).
Note: The term, “SoftK56”, refers to the family of RS56
modem models listed in Table 1.
Modem operation, including dialing, call progress,
telephone line interface, cell phone interface, and host
interface functions are supported and controlled through
the command set.
The modem hardware connects to the host processor via
a PCI bus interface. The OEM adds a crystal circuit,
EEPROM, telephone line interface, cellular phone
interface, and audio interface, as required and supported
by the modem model to complete the system.
Host Modem Software
The host modem software performs two distinct tasks:
1.
General modem control, which includes command
sets, fax Class 1, voice/TAM, speakerphone, error
correction, data compression, VoiceView, cell phone
drivers, and operating system interface functions.
2.
Modem data pump signal processing, which includes
data and facsimile modulation and demodulation, as
well as voice sample formatting.
Configurations of the modem software are provided to
support modem models listed in Table 1.
Binary executable modem software is provided for the
OEM.
Data/Fax Modes
As a V.90/K56flex data modem, the modem can receive
data from a digital source using a V.90- or K56flex-
compatible central site modem over the digital telephone
network portion of the PSTN 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.
As a V.34 data modem, the modem can operate in 2-wire,
full-duplex, asynchronous modes at line rates up to 33.6
kbps. 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 fax modem mode, the modem can operate in 2-wire,
half-duplex, synchronous modes and can support Group 3
facsimile send and receive speeds of 14400, 12000,
9600, 7200, 4800, or 2400 bps. Fax data transmission
and reception performed by the modem are controlled and
monitored through the fax EIA/IA-578 Class 1 and T.31
Class 1.0 command interface. Full HDLC formatting, zero
insertion/deletion, and CRC generation/checking are
provided.
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.
Voice/TAM Mode
Voice/TAM Mode features include 8-bit
µ-Law, A-Law, and
linear coding at 8000 Hz and 7200 Hz sample rates. Tone
detection/generation, call discrimination, and concurrent
DTMF detection are also supported. ADPCM (4-bit IMA)
coding is also supported to meet Microsoft WHQL logo
requirements.
Voice/TAM Mode is supported by three submodes:
1.
Online Voice Command Mode supports connection to
the telephone line or, for the SP model, a
microphone/speaker.
2.
Voice Receive Mode supports recording voice or
audio data input at the RIN pin, typically from the
telephone line or, for the SP model, a microphone.
3.
Voice Transmit Mode supports playback of voice or
audio data to the TXA1/TXA2 output, typically to the
telephone line or, for the SP model, a speaker.
Speakerphone Mode (SP Model)
The SP model includes additional external microphone
and speaker interfaces which support voice and full-
duplex speakerphone (FDSP) operation.
Hands-free full-duplex telephone operation is supported in
Speakerphone Mode under host control. Speakerphone
Mode features an advanced proprietary speakerphone
algorithm which supports full-duplex voice conversation
with acoustic and line echo cancellation. Parameters are
constantly adjusted to maintain stability with automatic
fallback from full-duplex to pseudo-duplex operation. The
speakerphone algorithm allows position independent
placement of microphone and speaker. The host can
separately control volume, muting, and AGC in
microphone and speaker channels.
Cellular Phone Support
Cellular phone operation is supported by a generic
hardware interface meeting multiple standards and host
software specific to a particular phone type.
Development of software for specific phones is supported
by a software developer's kit. This kit allows for
straightforward porting of analog and digital cellular phone
drivers to the modem. Consult software release notes for
the latest supported types and models.




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