Specifications

15
Modems|
data at up to 56 KBps, analog fax at up to 14.4 KBps, Telephone
Answering Machine (TAM)/telephony extensions and voice/speaker-
phone (optional). The new V.44 standard is also supported
.
Quick Connect
This feature approximates the always on connection of broadband
access solutions by enabling dial-up modems to complete the
modem handshake sequence 30 percent through 40 percent faster
than before.
PCM Upstream
Using a new modulation for upstream data (a variation of PCM),
V.92 supports a maximum upstream data rate of 48 KBps, as
compared to 33.6 KBps for V.90. At the maximum rate, this
represents a 40 percent improvement in upstream throughput.
Users will also see throughput improvements when uploading dig-
ital audio and image files.
Modem-on-Hold
Call waiting is a popular feature offered by many telephone
companies around the world. Unfortunately, a call-waiting event
may disconnect a modem when it is in use, frustrating the user
and often prompting a call to the OEM or ISP support center.
Modem-on-hold allows the modem to remain online during a
call-waiting event, thereby eliminating the need to redial to get
back on the Internet.
SmartDAA
Conexant’s proprietary SmartDAA technology eliminates the need
for the costly analog transformer, relays and opto-isolators typically
used in discrete DAA implementations. The SmartDAA architecture
also simplifies product implementation by eliminating the need
for country-specific board configurations and enables worldwide
homologation of a single modem board design and a single Bill
of Materials (BOM).
The system-powered SmartDAA operates reliably without drawing
power from the line. Line-powered DAAs, on the other hand,
operate poorly when the line current is insufficient due to long
lines or poor line conditions. Enhanced features, such as
monitoring of local extension status without going off-hook,
are also supported. Incorporating Conexant’s proprietary Digital
Isolation Barrier (DIB) design and other innovative DAA features,
the SmartDAA architecture simplifies application design, minimizes
layout area and reduces component cost.
Device Details
The SmartACF device set consists of a CX81300 modem controller and
DSP (MCD) in a 128-pin TQFP, and a CX20463 SmartDAA line side
device (LSD) in a 32-pin TQFP. It supports data/fax/TAM operation
with a hardware-based modem controller, digital signal processing,
and DAA/telephone line interface functions. The speakerphone option
(S models) supports position-independent, Full-Duplex Speakerphone
(FDSP) and analog cellular operation.
SmartACF
SmartACFL56S-PCC
SmartACF/56S
SmartACF/56
SmartACF/33S
SmartACF/33
SmartACF/14S
SmartACF/14
*Caller ID functions available for European Countries on some types.
Note. Two memory configurations are possible:
a.) 256K x 8 ROM/FLASH + 128K x 8 RAM (support and download)
b.) 128K x 8 ROM/FLASH + 32K x 8 RAM* (V.32 and V.34 based only)
Note: For Low Power applications please call us for information, the
RC56LD family is suitable for PCMCIA/PC card applications.
*Note: New controllers with internal 32K x 8 RAM are available
therefore reducing chipcount and PCB area.
Data Modem: V.90 x x x x x x x
V.92
V.34 x x
V.32 bis
V.32
V.22 bis
V.22
V.23
V.21
Bell 212A
Bell 103
V.42LAPM
MNP 2-4
Fax Modem: V. 17
V.29
V.27 ter
V.21ch.2
Class 1 Fax Commands
Class 2 Fax Commands
Features: AudioSpan x x x x x x x
FDSP x x x
Data/Fax
VoiceView Q61 x x x x x x x
DSVD V.70 x x x x x x
W-Class
AT Commands
ADPCM
Group 3
T.30 Protocol
Call Progress
*Caller ID
Distinctive Ring
DTMF/Pulse Dial
16C550 Bus Interface
Memory Requirements 128K x 8 or 256K x 8 ROM
Power Required (mW) 600 610 600 610 600 610 TBA
Sleep Power TBA TBA TBA TBA TBA TBA TBA
No of Chips: PLCC x x x x x x x
PQFP 3 4 3 4 3 4 4
CARDBUS x x x x x x
Serial x
Parallel x
Data Sheet no: MDxxx 252 252 252 252 252 100 444
Des. Guide no. 1127 1127 1127 1127 1127 1127 tba
supported
x not supported
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