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RCV56HCF
User Manual
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Hayes Microcomputer Products RCV56HCF User Manual

RCV56HCF PCI/CardBus Modem Designer's Guide
(Preliminary)
ROCKWELL PROPRIETARY INFORMATION.
DISSEMINATION OR USE OF THIS INFORMATION IS NOT PERMITTED WITHOUT THE
WRITTEN PERMISSION OF ROCKWELL INTERNATIONAL.
Order No. 1129
Rev. 1, August 19, 1997
NOTICE
Information furnished by Rockwell International Corporation is believed to be accurate and reliable. However, no responsibility is assumed by Rockwell International for its use, nor any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent rights of Rockwell International other than for circuitry embodied in Rockwell products. Rockwell International reserves the right to change circuitry at any time without notice. This document is subject to change without notice.
K56flex is a trademark of Lucent Technologies and Rockwell International. MNP 10EC and DigiTalk are trademarks of Rockwell International. MNP is a trademark of Microcom Systems, Inc. VoiceView is a registered trademark of Radish Communications, Inc. Hayes is a trademark of Hayes Microcomputer Products, Inc.
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Table of Contents
1. INTRODUCTION .............................................................................................................................................1-1
1.1 SUMMARY................................................................................................................................................. 1-1
1.2 FEATURES................................................................................................................................................1-1
1.3 TECHNICAL OVERVIEW ...........................................................................................................................1-7
1.3.1 General Description..........................................................................................................................1-7
1.3.2 Operating Modes..............................................................................................................................1-7
Data/Fax Modes..............................................................................................................................1-7
AudioSpan Modes...........................................................................................................................1-7
Host-Controlled DSVD Mode (ISDN and SP Models) .......................................................................1-7
Voice/Audio Mode (V Models)..........................................................................................................1-7
Speakerphone Mode (ISDN and SP Models)...................................................................................1-8
Synchronous Access Mode (SAM)...................................................................................................1-8
1.3.3 Host-Controlled Modem Software......................................................................................................1-8
1.3.4 Downloadable Modem Data Pump Firmware.....................................................................................1-8
1.3.5 Hardware Interfaces .........................................................................................................................1-8
2. TECHNICAL SPECIFICATIONS......................................................................................................................2-1
2.1 ESTABLISHING DATA MODEM CONNECTIONS.......................................................................................2-1
Dialing............................................................................................................................................. 2-1
Modem Handshaking Protocol.........................................................................................................2-1
Call Progress Tone Detection..........................................................................................................2-1
Answer Tone Detection ...................................................................................................................2-1
Ring Detection............................................................................................................................... ..2-1
Billing Protection.............................................................................................................................. 2-1
Connection Speeds.........................................................................................................................2-1
Automode .......................................................................................................................................2-1
2.2 DATA MODE..............................................................................................................................................2-1
Speed Buffering (Normal Mode) ...................................................................................................... 2-1
DTE-to-Modem Flow Control ...........................................................................................................2-1
Escape Sequence Detection............................................................................................................2-1
GSTN Cleardown (K56flex, V.34, V.32 bis, V.32).............................................................................2-1
Fall Forward/Fallback (K56flex, V.34/V.32 bis/V.32).........................................................................2-2
Retrain............................................................................................................................................2-2
2.3 ERROR CORRECTION AND DATA COMPRESSION.................................................................................2-2
V.42 Error Correction ......................................................................................................................2-2
MNP 2-4 Error Correction................................................................................................................2-2
V.42 bis Data Compression.............................................................................................................2-2
MNP 5 Data Compression...............................................................................................................2-2
2.4 MNP 10EC™ ENHANCED CELLULAR CONNECTION...............................................................................2-2
2.5 FAX CLASS 1 OPERATION .......................................................................................................................2-2
2.6 VOICE/AUDIO MODE ................................................................................................................................2-2
2.6.1 Online Voice Command Mode........................................................................................................... 2-3
2.6.2 Voice Receive Mode.........................................................................................................................2-3
2.6.3 Voice Transmit Mode........................................................................................................................2-3
2.6.4 Tone Detectors................................................................................................................................. 2-3
2.6.5 Speakerphone Modes.......................................................................................................................2-3
SIMULTANEOUS AUDIO/VOICE AND DATA (A
2.7
2.8 HOST-BASED DSVD MODE......................................................................................................................2-3
2.9 FULL-DUPLEX SPEAKERPHONE (FDSP) MODE......................................................................................2-3
2.10 VOICEVIEW.............................................................................................................................................2-3
2.11 CALLER ID...............................................................................................................................................2-4
2.12 WORLD CLASS COUNTRY SUPPORT....................................................................................................2-4
2.12.1 Programmable Parameters.............................................................................................................2-4
2.12.2 Blacklist Parameters.......................................................................................................................2-4
2.13 DIAGNOSTICS.........................................................................................................................................2-4
UDIOSPAN
)..........................................................................2-3
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2.13.1 Commanded Tests..........................................................................................................................2-4
2.13.2 Power On Reset Tests....................................................................................................................2-4
2.14 LOW POWER SLEEP MODE...................................................................................................................2-4
3. HARDWARE INTERFACE...............................................................................................................................3-1
3.1 HARDWARE SIGNAL PINS AND DEFINITIONS.........................................................................................3-1
3.2 ELECTRICAL,SWITCHING,AND ENVIRONMENTAL CHARACTERISTICS...............................................3-18
3.2.1 Power and Maximum Ratings..........................................................................................................3-18
3.2.2 PCI Bus..........................................................................................................................................3-19
3.2.3 MDP...............................................................................................................................................3-20
3.3 INTERFACE TIMING AND WAVEFORMS................................................................................................3-22
3.3.1 PCI Bus Timing...............................................................................................................................3-22
3.3.2 Serial EEPROM Timing...................................................................................................................3-22
3.3.3 External Device Bus Timing ............................................................................................................3-23
3.3.4 IOM-2 Interface ..............................................................................................................................3-25
4. DESIGN CONSIDERATIONS .......................................................................................................................... 4-1
4.1 PC BOARD LAYOUT GUIDELINES............................................................................................................4-1
4.1.1 General Principles.............................................................................................................................4-1
4.1.2 Component Placement......................................................................................................................4-1
4.1.3 Signal Routing ..................................................................................................................................4-2
4.1.4 Power...............................................................................................................................................4-3
4.1.5 Ground Planes..................................................................................................................................4-4
4.1.6 Crystal Circuit...................................................................................................................................4-4
4.1.7 VC_L1 and VREF Circuit...................................................................................................................4-4
4.1.8 Telephone and Local Handset Interface............................................................................................4-5
4.1.9 Optional Configurations..................................................................................................................... 4-5
4.1.10 MDP Specific..................................................................................................................................4-5
4.2 CRYSTAL/OSCILLATOR SPECIFICATIONS..............................................................................................4-5
4.3 OTHER CONSIDERATIONS ...................................................................................................................... 4-5
4.4 PACKAGE DIMENSIONS........................................................................................................................... 4-8
5. SOFTWARE INTERFACE................................................................................................................................5-1
5.1 PCI C
5.2 BASE ADDRESS REGISTER.....................................................................................................................5-3
5.3 SERIAL EEPROM INTERFACE..................................................................................................................5-4
6. COMMAND SET..............................................................................................................................................6-1
ONFIGURATION REGISTERS
5.1.1 Vendor ID Field.................................................................................................................................5-1
5.1.2 Device ID Field ................................................................................................................................ .5-1
5.1.3 Command Register...........................................................................................................................5-2
5.1.4 Status Register................................................................................................................................. 5-2
5.1.5 Revision ID Field...............................................................................................................................5-3
5.1.6 Class Code Field...............................................................................................................................5-3
5.1.7 Latency Timer Register.....................................................................................................................5-3
5.1.8 Header Type Field ............................................................................................................................5-3
5.1.9 CIS Pointer Register.........................................................................................................................5-3
5.1.10 Subsystem Vendor ID and Subsystem ID Registers........................................................................5-3
5.1.11 Interrupt Line Register ....................................................................................................................5-3
5.1.12 Interrupt Pin Register......................................................................................................................5-3
5.1.13 Min Grant and Max Latency Registers..................................................................................... ........5-3
....................................................................................................................5-1
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List of Figures
Figure 1-1. RCV56HCF System Overview..........................................................................................................................1-4
Figure 1-2. RCV56HCF Hardware Configuration Block Diagram.........................................................................................1-5
Figure 1-3. Typical Audio Signal Interface (U.S.)..............................................................................................................1-10
Figure 3-1. RCV56HCF Interface Signals...........................................................................................................................3-2
Figure 3-2. Bus Interface 176-Pin TQFP Hardware Interface Signals .................................................................................3-3
Figure 3-3. Bus Interface 176-Pin TQFP Pin Signals..........................................................................................................3-4
Figure 3-4. MDP 144-Pin TQFP Hardware Interface Signals............................................................................................3-11
Figure 3-5. MDP 144-Pin TQFP Pin Signals.....................................................................................................................3-12
Figure 3-6. Waveforms - Serial EEPROM Interface..........................................................................................................3-22
Figure 3-7. Waveforms - External Device Bus Interface...................................................................................................3-24
Figure 3-8. Waveforms - IOM-2 Interface.........................................................................................................................3-25
Figure 4-1. Package Dimensions - 144-Pin TQFP.............................................................................................................. 4-8
Figure 4-2. Package Dimensions - 176-Pin TQFP.............................................................................................................. 4-9
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List of Tables
Table 1-1. Modem Models and Functions ..........................................................................................................................1-3
Table 1-2. Typical Signal Routing - Voice Mode...............................................................................................................1-11
Table 1-3. Relay Positions - VoiceView Mode ..................................................................................................................1-11
Table 3-1. Bus Interface 176-Pin TQFP Pin Signals...........................................................................................................3-5
Table 3-2. Bus Interface Pin Signal Definitions...................................................................................................................3-7
Table 3-3. MDP Pin Signals - 144-Pin TQFP....................................................................................................................3-13
Table 3-4. MDP Pin Signal Definitions..............................................................................................................................3-15
Table 3-5. Current and Power Requirements ...................................................................................................................3-18
Table 3-6. Maximum Ratings........................................................................................................................................... 3-18
Table 3-7. PCI Bus DC Specifications for 3.3V Signaling..................................................................................................3-19
Table 3-8. PCI Bus AC Specifications for 3.3V Signaling..................................................................................................3-19
Table 3-9. MDP Digital Electrical Characteristics..............................................................................................................3-20
Table 3-10. Analog Electrical Characteristics ...................................................................................................................3-21
Table 3-11. Timing - Serial EEPROM Interface................................................................................................................3-22
Table 3-12. Timing - External Device Bus Interface............................................................................. .............................3-23
Table 3-13. Timing - IOM-2 Interface...............................................................................................................................3-25
Table 4-1. Modem Pin Noise Characteristics......................................................................................................................4-3
Table 4-2. Crystal Specifications - Surface Mount..............................................................................................................4-6
Table 4-3. Crystal Specifications - Through Hole................................................................................................................4-7
Table 5-1. PCI Configuration Registers..............................................................................................................................5-1
Table 5-2. Command Register............................................................................................................................... ............5-2
Table 5-3. Status Register.................................................................................................................................................5-2
Table 5-4. BIF Address Map..............................................................................................................................................5-3
Table 5-5. EEPROM Configuration Data............................................................................................................................ 5-4
Table 6-1. Command Set Summary - Functional Use Sort .................................................................................................6-1
Table 6-2. Command Set Summary - Alphanumeric Sort...................................................................................................6-4
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1. INTRODUCTION
1.1 SUMMARY
The Rockwell RCV56HCF-PCI Host-Controlled Modem Device Family supports high speed analog data, high speed fax, ISDN, DSVD, AudioSpan, speakerphone, audio/voice, and VoiceView operation. It operates with PSTN or ISDN telephone lines in the U.S. and world-wide and is offered in several device models (see Table 1-1).
The modem device set consists of PC PCI bus interface (BIF) and modem data pump (MDP) hardware available in two thin quad flat packs (TQFPs). Host-controlled modem software is also provided.
Operating with +3.3V power, this device set supports 32-bit host applications in such designs as embedded motherboards, PCI half cards, and CardBus cards.
Figure 1-1 illustrates the general structure of the RCV56HCF software and the interface to the RCV56HCF hardware. Figure 1-2 illustrates the major hardware interfaces supported by each model.
The RCV56HCF employs a downloadable architecture so that the user can update MDP executable code. Using K56flex technology, the RCV56HCF can receive data at speeds up to 56 kbps from a digitally connected K56flex-
compatible central site modem, such as a Rockwell RC56CSM modem. K56flex modems take 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. The RCV56HCF can send data at speeds up to V.34 rates.
In V.34 data mode, the modem operates at line speeds up to 33600 bps. Error correction (V.42/MNP 2-4) and data compression (V.42 bis/MNP 5) maximize data transfer integrity and boost average data throughput. Non-error-correcting mode is also supported.
AudioSpan (analog simultaneous audio/voice and data) operation supports a data rate with audio of 4.8 kbps. SP models support position independent, full-duplex speakerphone (FDSP), as well as digital simultaneous voice and data
(DSVD) with speech coding per ITU-T G.729 Annex A with interoperable G.729 Annex B, and SIG DigiTalk DSVD. The modem supports fax Group 3 send and receive rates up to 28800 bps and T.30 protocol. V.80 and Rockwell Video Ready compatible synchronous access modes support host-controlled communication protocols, e.
g., H.324 video conferencing. In voice/audio mode, PCM coding and decoding at 8000 Hz sample rate allows efficient digital storage of voice/audio. This
mode supports digital telephone answering machine, voice annotation, and audio recording/playback applications. AccelerATor kits and reference designs are available to minimize application design time and costs. This designer's guide describes the modem hardware capabilities and identifies the supporting commands. Commands and
parameters are defined in the RCVHCF Command Reference Manual (Order No. 1118).
1.2 FEATURES
•
Data modem
−
K56flex, 33.6 kbps, 31.2 kbps, V.34, V.32 bis, V.32, V.22 bis, V.22A/B, V.23, and V.21; Bell 212A and 103
−
V.42 LAPM and MNP 2-4 error correction
−
V.42 bis and MNP 5 data compression
−
V.25 ter (Annex A) and EIA 602 command set
•
Fax modem send and receive rates up to 28800 bps
−
ITU-T V.34 fax*, V.17, V.29, V.27 ter, and V.21 ch 2
−
EIA/TIA 578 Class 1, Class 1.0 (T.31) fax
•
ISDN BRI support (option)*
−
PC Bus support 2B+D channels
−
IOM-2 interface to external U or S/T transceiver
−
Simultaneous transfer of B1, B2, D channels (144 kbps; 64 kbps x 2, 16 kbps)
−
V.34, DSVD, FDSP, audio functions over B channel
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ROCKWELL PROPRIETARY INFORMATION
1-1
•
AudioSpan (simultaneous audio/voice and data)*
−
ITU-T V.61 modulation (4.8 kbps data plus audio)
−
Handset, headset, or half-duplex speakerphone
•
ITU-T V.70 DSVD (option)
−
ITU-T G.729 Annex A with interoperable G.729 Annex B
−
SIG (special interest group) DigiTalk DSVD
−
Voice/silence detection and handset echo cancellation
−
Handset, headset, or half-duplex speakerphone
•
Full-duplex speakerphone (FDSP) mode
−
Over PSTN or ISDN B channel (option)
−
Switching to/from data, fax, DSVD and VoiceView
−
Microphone gain and muting
−
Speaker volume control and muting
−
Adaptive line and acoustic echo cancellation
−
Loop gain control, transmit and receive path AGC
−
Acoustic echo cancellation concurrent with DSVD
−
Noise suppression
−
Room monitor
•
V.80 and Rockwell Video Ready synchronous access modes support host-controlled communication protocols
−
H.324 interface support
•
V.8/V.8bis and supporting AT commands (V.25 ter with Annex A)
•
Data/Fax/VoiceView/Voice call discrimination
•
Voice, telephony, audio, VoiceView
−
Voice (8-bit µ-Law compression/decompression)
−
TIA-695 command set
−
VoiceView alternating voice and data (option)
−
8-bit linear and 8-bit µ-Law record/playback
−
8.0 kHz, 11.025 kHz, 22.050 kHz and 44.1 kHz (down sampled to 11.025)
−
Handset, acoustic, line echo cancellation
−
Music on hold from host or analog hardware input
−
TAM support with concurrent DTMF detect, ring detect and caller ID
•
World-class operation (option)
−
Call progress, blacklisting, multiple country support
•
Integrated internal hybrid
•
Caller ID and distinctive ring detect
•
Modem and audio paths concurrent across PCI bus
•
Single profile stored in host
•
System compatibilities
−
Windows 95 and Windows NT operating systems
−
Microsoft's PC 97 Design Initiative compliant
−
Unimodem/V compliant
•
32-bit PCI Local Bus interface
−
Conforms to the PCI Local Bus Specification, Production Version, Revision 2.1
−
PCI Bus Mastering interface to the MDP
−
CardBus support with 512-byte RAM for CIS
−
33 MHz PCI clock support
•
Device packages:
−
Bus Interface in 176-pin TQFP
−
MDP in 144-pin TQFP
•
+3.3V operation
* See Note 6 in Table 1-1.
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ROCKWELL PROPRIETARY INFORMATION
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Table 1-1. Modem Models and Functions
Supported Functions
Marketing
Model Number
RCV56HCF/ISDN Y Y Y Y – RCV56HCFW/ISDN Y Y Y Y Y RCV56HCF/SP Y Y – Y – RCV56HCFW/SP Y Y – Y Y RC56HCF Y – – – – RC56HCFW Y – – – Y
Notes:
1. The two-device set manufacturing part numbers are:
2
. Lege
3. Model options:
4. Supported functions (Y = Supported; – = Not supported):
5. Provides ISDN functionality with the addition of a U or S/T transceiver device.
6. Initial production does not include support for ISDN, V.34 fax, and AudioSpan.
1
PCI Bus Interface in 176-pin TQFP: 11229-XX. MDP in 144-pin TQFP: R6776-XX.
nd:
Y = Function supported. – = Function not supported.
SP Speakerphone and DSVD. V Voice, audio, and VoiceView. W World-class (W-class).
FDSP Full-duplex speakerphone. DSVD Digital simultaneous voice and data. Voice/Audio Voice and audio functions. VoiceView VoiceView alternating voice and data. W-Class World-class functions supporting multiple country requirements.
K56flex,
V.34 Fax
6
Voice/Audio/
VoiceView/
AudioSpan
6
5,6 Full-duplex
ISDN
Speakerphone
(FDSP)
and DSVD
W-Class
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1-3
PC Software
Win32-based
communications
application
Modem Hardware
on Motherboard
or Plug-in Module
Win16-based
communications
application
Communications Stack
RC56HCF
Serial Port Driver*
MS-DOS
application
(MS-DOS Box)
Win95
RCV56HCF
Modem Device Set Hardware
Bus
Interface
(BIF)*
Modem
Data Pump
(MDP)*
Win32 NDIS
application
RC56HCF
WAN Miniport Driver*
* Rockwell supplied
1123F1 SO
Figure 1-1. RCV56HCF System Overview
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ROCKWELL PROPRIETARY INFORMATION
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RC56HCF MODEM DEVICE SET
BUS
INTERFACE
(BIF)
MODEM
DATA PUMP
(MDP)
DAA AND TELEPHONE HANDSET INTERFACE
TELEPHONE HANDSET*
TELEPHONE LINE
a. Data/Fax - PSTN Configuration (RC56HCF and RC56HCFW)
VOICE*
TXA RXA CID*
OH
RING
RCV56HCF MODEM DEVICE SET
BUS
INTERFACE
(BIF)
MODEM
DATA PUMP
(MDP)
b. Data/Fax/Voice/Speakerphone, SVD - PSTN Configuration (RCV56HCF/SP and RCV56HCFW/SP)
HOST
INTERFACE
HOST
INTERFACE
* OPTIONAL USE (SUPPORTED BY MODEL HARDWARE AND SOFTWARE).
* OPTIONAL USE (SUPPORTED BY MODEL HARDWARE AND SOFTWARE).
MICROPHONE
SPEAKER
AUDIO
INTERFACE
SPKR
MIC
TXA RXA CID*
OH RING LCS*
VOICE*
DAA AND TELEPHONE HANDSET INTERFACE
TELEPHONE HANDSET (OPTIONAL)
TELEPHONE LINE
DC
FEED
Figure 1-2. RCV56HCF Hardware Configuration Block Diagram
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ROCKWELL PROPRIETARY INFORMATION
1-5
ISDN
U OR S/T
INTERFACE
RCV56HCF MODEM DEVICE SET
BUS
INTERFACE
(BIF)
MODEM
DATA PUMP
(MDP)
ISDN LINE
c. Data/Fax/Voice/Speakerphone, SVD/ISDN - PSTN and ISDN Configuration (RCV56HCF/ISDN and RCV56HCFW/ISDN)
MICROPHONE*
SPEAKER*
AUDIO INTERFACE (OPTIONAL)
SPKR*
MIC*
ISDN
U OR S/T
INTERFACE
RCV56HCF MODEM DEVICE SET
BUS
INTERFACE
(BIF)
MODEM
DATA PUMP
(MDP)
TELEPHONE
HANDSET INTERFACE
(OPTIONAL)
ISDN LINE
d. Data/Fax/Voice/Speakerphone, SVD/ISDN - ISDN Only Configuration (RCV56HCF/ISDN and RCV56HCFW/ISDN)
TELEPHONE HANDSET 2
RING*
LCS*
DC
FEED
TELEPHONE HANDSET 1
RING*
LCS
DC
FEED
* OPTIONAL USE (SUPPORTED BY MODEL HARDWARE AND SOFTWARE).
MD189F1 CONF
HOST
INTERFACE
HOST
INTERFACE
* OPTIONAL USE (SUPPORTED BY MODEL HARDWARE AND SOFTWARE).
TXA
RXA
CID*
OH RING LCS*
VOICE*
DAA AND TELEPHONE HANDSET INTERFACE
TELEPHONE HANDSET (OPTIONAL)
TELEPHONE LINE
DC
FEED
Figure 1-2. RCV56HCF Hardware Configuration Block Diagram (Continued)
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ROCKWELL PROPRIETARY INFORMATION
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1.3 TECHNICAL OVERVIEW
1.3.1 General Description
The RCV56HCF Device Set provides the processing core for a complete system design featuring data/fax modem, DSVD, AudioSpan, speakerphone, voice/audio, and VoiceView depending on specific model (Table 1-1). Note: RCV56HCF Device Set refers to the family of single device modem models listed in Table 1-1.
The modem is the full-featured, self-contained data modem/fax modem/DSVD/voice/audio/speakerphone solution. Dialing, call progress, telephone line interface, AudioSpan, DSVD, speakerphone, voice/audio, and VoiceView functions are supported and controlled through the command set.
The modem hardware connects to the host PC via a PCI bus interface. The OEM adds a crystal circuit, telephone line interface, telephone interface (optional), audio interface (optional), and ISDN interface (optional) to complete the system.
1.3.2 Operating Modes
Data/Fax Modes In K56flex mode, the modem can receive data from a digital source using a K56flex -compatible central site modem (e.
g., Rockwell RC56CSM) over the digital telephone network portion of the PSTN at line speeds up to 56 kbps. Asymmetrical data transmission supports sending data at V.34 rates. This mode can fall back to full-duplex V.34 mode, and to slower rates as supported by line conditions.
In V.34 data modem mode, the modem can also operate in 2-wire, full-duplex, asynchronous modes at line rates up to 33600 bps. 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 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 modes, the modem fully supports Group 3 facsimile send and receive speeds of 28800, 14400, 12000, 9600, 7200, 4800, or 2400 bps. Fax modes support Group 3 fax requirements. Fax data transmission and reception performed by the modem are controlled and monitored through the fax EIA-578 Class 1 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 the DTE is flow controlled by XON/XOFF and RTS/CTS.
AudioSpan Modes AudioSpan provides full-duplex analog simultaneous audio/voice and data over a single telephone line at a data rate with
audio of 4800 bps using V.61 modulation. AudioSpan can send any type of audio waveform, including music. Data can be sent with or without error correction. The audio/voice interface can be in the form of a headset, handset, or microphone and speaker (half-duplex speakerphone). Handset echo cancellation is provided.
Host-Controlled DSVD Mode (ISDN and SP Models) ISDN and SP models support host-controlled DSVD. A microphone and a speaker are required.
ITU-T interoperable G.729 and G.729 Annex A with interoperable G.729 Annex B Operation.
supports speech coding at an average bit rate significantly lower than 8.0 kbps.
SIG DigiTalk.
Voice/Audio Mode (V Models) Voice/Audio Mode features include 8-bit linear and 8-bit µ-Law coding/decoding, tone detection/generation and call
discrimination, concurrent DTMF detection, and 8-bit monophonic audio data encoding at 11.025 kHz or 8000 Hz. Voice/Audio Mode is supported by three submodes:
1. Online Voice Command Mode supports connection to the telephone line or a voice/audio I/O device (e.g., microphone, speaker, or handset).
2. Voice Receive Mode supports recording voice or audio data input at the MIC_M pin, typically from a microphone/handset or the telephone line.
3. Voice Transmit Mode supports playback of voice or audio data to the TXA1_L1/TXA2_L1 output, typically to a speaker/handset or to the telephone line.
Speech coding is performed at 8.5 kbps.
Voice activity detection
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ROCKWELL PROPRIETARY INFORMATION
1-7
Speakerphone Mode (ISDN and SP Models) The speakerphone mode features an advanced proprietary speakerphone algorithm which supports full-duplex voice
conversation with both 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 speakerphone mode provides hands-free full-duplex telephone operation under host control. The host can separately control volume, muting, and AGC in microphone and speaker channels.
Synchronous Access Mode (SAM) V.80 and Rockwell Video Ready synchronous access modes between the modem and the host/DTE are 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.
1.3.3 Host-Controlled Modem Software
Host-controlled modem software performs processing of general modem control, command sets, fax Class 1, AudioSpan, DSVD, speakerphone, voice/audio/TAM, error correction, data compression, and operating system interface functions. Configurations of the modem software are provided to support modem models listed in Table 1-1.
Binary executable modem software is provided for the OEM.
1.3.4 Downloadable Modem Data Pump Firmware
Binary executable code controlling MDP operation is downloaded as required during operation.
1.3.5 Hardware Interfaces
1.3.5.1 PCI Bus Host Interface
The Bus Interface conforms to the PCI Local Bus Specification, Production Version, Revision 2.1, June 1, 1995. It is a memory slave (burst transactions) and a bus master for PC host memory accesses (burst transactions). Configuration is by PCI configuration protocol.
The following interface signals are supported:
•
Address and data
−
32 bidirectional Address/Data (AD[31-0]; bidirectional
−
Four Bus Command and Byte Enable (CBE [3:0]), bidirectional
−
Bidirectional Parity (PAR); bidirectional
•
Interface control
−
Cycle Frame (FRAME#); bidirectional
−
Initiator Ready (IRDY#); bidirectional
−
Target Ready (TRDY#); bidirectional
−
Stop (STOP#); bidirectional
−
Initialization Device Select (IDSEL); input
−
Device Select (DEVSEL#); bidirectional
•
Arbitration
−
Request (REQ#); output
−
Grant (GRANT#); input
•
Error reporting
−
Parity Error ((PERR#); bidirectional
−
System Error ; bidirectional
•
Interrupt
−
Interrupt A (INTA#); output
•
System
−
Clock (PCICLK); input
−
Reset (PCIRST#); input
−
Clock Running (CLKRUN#); input
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1.3.5.2 Serial EEPROM Interface
A serial EEPROM is required to store the Maximum Latency, Minimum Grant, Device ID, Vendor ID, Subsystem ID, and Subsystem Vendor ID parameters for the PCI Configuration Space Header. Microchip 93LC66B, Atmel AT93C66, line from the EEPROM (SROMIN), a serial data output line to the EEPROM (SROMOUT), Clock to the EEPROM (SROMCLK), and chip select to the EEPROM (SROMCS).
1.3.5.3 Audio Interface
One Speaker output (SPKROUT_M) is provided for an optional OEM-supplied speaker circuit. Two microphone inputs are supported: one for Voice Microphone input (MIC_V) and one for Music Microphone input (MIC_M), e.g., music-on-hold.
The MIC_V and SPKROUT_M lines connect to the handset and speaker to support functions such as AudioSpan headset and speakerphone modes, FDSP, telephone emulation, microphone voice record, speaker voice playback, and call progress monitor.
The MIC_M input can accept an external audio signal to support the music-on-hold function and routes it to the telephone line. If music-on-hold function is not required, the microphone signal can be connected to the MIC_M input to support telephone emulation mode.
The Speaker output (SPKROUT_M) carries the normal speakerphone audio or reflects the received analog signals in the modem.
1.3.5.4 Telephone Line/Telephone/Audio Interface
The Telephone Line/Telephone/Audio Signal Interface can support a 3-relay telephone line interface (Figure 1-3). Signal routing for Voice mode is shown in Table 1-2. Relay positions for VoiceView are shown in Table 1-3.
The following signals are supported:
•
A single-ended Receive Analog input (RXA_L1) and a differential Transmit Analog output (TXA1_L1 and TXA2_L1) to the telephone line.
•
Off-hook (OH_L1#), Caller ID (CID_L1#), and Voice (VOICE_L1#) relay control outputs.
•
A Ring Indicate (IRING_L1) input.
•
A Loop Current Sense (LCS) input.
•
An input from the telephone microphone (TELIN_L1) and an output to the telephone speaker (TELOUT_L1 ) are supported in AudioSpan modes. These lines connect voice record/playback and AudioSpan audio to the local handset.
or equivalent 256 x 16 serial EEPROM. The interface signals are: a serial data input
The EEPROM is programmable by the PC via the BIF.
The serial EEPROM interface connects to an
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LCS_L1#
IRING_L1#
VOICE#
OH_L1#
CID_L1#
VC_L1
RCV56HCF
MODEM DEVICE
TXA1_L1 TXA2_L1
RXA_L1
TELOUT_L1
TELIN_L1
MIC_M
MIC_V
SPKROUT_M
HYBRD
&
XFRMR
CALLID RELAY
TELEPHONE LINE/TELEPHONE HANDSET
SSI
&
BRDGE
OH
RELAY
HANDSET
HYBRID
VOICE RELAY
CUR SRC
INTERFACE CIRCUIT
BIAS
SOUNDUCER
(OPTIONAL)
AUDIO/HEADPHONE
INTERFACE CIRCUIT
Figure 1-3. Typical Audio Signal Interface (U.S.)
AMP/
SURG PROT
RNG DET
TEL LINE
TEL HANDSET
LCS
MICROPHONE
HEADPHONE
1123F1-3 AIF 3R-US
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Table 1-2. Typical Signal Routing - Voice Mode
+VLS=
Command
0 Modem on hook. Phone connected to Line . . No No Yes 1 Modem connected to Line. RXA_L1 TXA1/2_L1 Yes Yes No 2 Modem connected to Handset TELIN_L1 TELOUT_L1 No Yes Yes 3 Modem connected to Line and Handset RXA_L1 TXA Yes No No 4 Modem connected to Speaker SPKROUT_M No No Yes 5 Modem connected to Line and Speaker RXA_L1 TXA1/2_L1, SPKROUT_M Yes Yes No 6 Modem connected to Microphone MIC_V . No No Yes 7 Speaker and Mic. routed to Line via Modem RXA_L1, MIC_M TXA1/2_L1, SPKROUT_M Yes Yes No 8 Modem connected to Speaker . SPKROUT_M No No Yes 9 Modem connected to Line and Speaker RXA_L1 TXA1/2_L1, SPKROUT_M Yes Yes No 10 Speaker and Mic. routed to Line via Modem RXA_L1, MIC_M TXA1/2_L1, SPKROUT_M Yes Yes No 11 Modem connected to Microphone MIC_V . No No Yes 12 Speaker and Mic. routed to Line via Modem RXA_L1, MIC_M TXA1/2_L1, SPKROUT_M Yes Yes No 13 Speaker and Mic. routed to Line via Modem RXA_L1, MIC_M TXA1/2_L1, SPKROUT_M Yes Yes No 14 Modem connected to Headset MIC_V SPKROUT_M No No Yes 15 Speaker and Mic. routed to Line via Modem
Description Input Selected Output Selected OH_L1#
RXA_L1, MIC_M TXA1/2_L1, SPKROUT_M
Output
Activated
Yes Yes No
VOICE#
Output
Activated
CID_L1#
Output
Activated
Table 1-3. Relay Positions - VoiceView Mode
2-Relay DAA
Off-Hook Relay (OH_L1)
Activated
Stage Function
1 On-hook No No 2a Detected tone - on-hook No No 2b Detected tone - off-hook for handset and speakerphone Yes No
3 Off-hook Yes Yes
Voice Relay (VOICE#)
Activated
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2. TECHNICAL SPECIFICATIONS
2.1 ESTABLISHING DATA MODEM CONNECTIONS
Dialing
DTMF Dialing.
complies with Bell Publication 47001.
Pulse Dialing. Blind Dialing.
Modem Handshaking Protocol If a tone is not detected within the time specified in the S7 register after the last digit is dialed, the modem aborts the call
attempt. Call Progress Tone Detection
Ringback, equipment busy, and progress tones can be detected in accordance with the applicable standard. Answer Tone Detection
Answer tone can be detected over the frequency range of 2100 ± 40 Hz in ITU-T modes and 2225 ± 40 Hz in Bell modes. Ring Detection
A ring signal can be detected from a TTL-compatible square wave input (frequency is country-dependent).
DTMF dialing using DTMF tone pairs is supported in accordance with ITU-T Q.23. The transmit tone level
Pulse dialing is supported in accordance with EIA/TIA-496-A.
The modem can blind dial in the absence of a dial tone if enabled by the X0, X1, or X3 command.
Billing Protection When the modem goes off-hook to answer an incoming call, both transmission and reception of data are prevented for a
period of time determined by country requirement to allow transmission of the billing signal. Connection Speeds
Data modem line connection can be selected using the +MS command in accordance with V.25 ter. The +MS command selects modulation, enables/disables automode, and selects transmit and receive minimum and maximum line speeds.
Automode Automode detection can be enabled by the +MS command to allow the modem to connect to a remote modem in
accordance with V.25 ter.
2.2 DATA MODE
Data mode exists when a telephone line connection has been established between modems and all handshaking has been completed.
Speed Buffering (Normal Mode) Speed buffering allows a DTE to send data to, and receive data from, a modem at a speed different than the line speed. The
modem supports speed buffering at all line speeds. DTE-to-Modem Flow Control
If the modem-to-line speed is less than the DTE-to-modem speed, the modem supports XOFF/XON or RTS/CTS flow control with the DTE to ensure data integrity.
Escape Sequence Detection The “+++” escape sequence can be used to return control to the command mode from the data mode. Escape sequence
detection is disabled by an S2 Register value greater than 127. GSTN Cleardown (K56flex, V.34, V.32 bis, V.32)
Upon receiving GSTN Cleardown from the remote modem in a non-error correcting mode, the modem cleanly terminates the call.
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Fall Forward/Fallback (K56flex, V.34/V.32 bis/V.32) During initial handshake, the modem will fallback to the optimal line connection within K56flex/V.34/V.32 bis/V.32 mode
depending upon signal quality if automode is enabled by the +MS command. When connected in K56flex/V.34/V.32 bis/V.32 mode, the modem will fall forward or fallback to the optimal line speed within
the current modulation depending upon signal quality if fall forward/fallback is enabled by the %E1 command. Retrain
The modem may lose synchronization with the received line signal under poor line conditions. If this occurs, retraining may be initiated to attempt recovery depending on the type of connection.
The modem initiates a retrain if line quality becomes unacceptable if enabled by the %E command. The modem continues to retrain until an acceptable connection is achieved, or until 30 seconds elapse resulting in line disconnect.
2.3 ERROR CORRECTION AND DATA COMPRESSION
V.42 Error Correction V.42 supports two methods of error correction: LAPM and, as a fallback, MNP 4. The modem provides a detection and
negotiation technique for determining and establishing the best method of error correction between two modems. MNP 2-4 Error Correction
MNP 2-4 is a data link protocol that uses error correction algorithms to ensure data integrity. Supporting stream mode, the modem sends data frames in varying lengths depending on the amount of time between characters coming from the DTE.
V.42 bis Data Compression V.42 bis data compression mode operates when a LAPM or MNP connection is established. The V.42 bis data compression employs a “string learning” algorithm in which a string of characters from the DTE is encoded
as a fixed length codeword. Two dictionaries, dynamically updated during normal operation, are used to store the strings. MNP 5 Data Compression
MNP 5 data compression mode operates during an MNP connection. In MNP 5, the modem increases its throughput by compressing data into tokens before transmitting it to the remote modem,
and by decompressing encoded received data before sending it to the DTE.
2.4 MNP 10EC™ ENHANCED CELLULAR CONNECTION
A traditional landline modem, when used for high-speed cellular data transmission, typically encounters frequent signal interference and degradation in the connection due to the characteristics of the analog cellular network. In this case, cellular­specific network impairments, such as non-linear distortion, fading, hand-offs, and high signal-to-noise ratio, contribute to an unreliable connection and lower data transfer performance. Implementations relying solely on protocol layer methods, such as MNP 10, generally cannot compensate for the landline modem's degraded cellular channel performance.
The modem achieves higher cellular performance by implementing enhanced cellular connection techniques at both the physical and protocol layers, depending on modem model. The modem enhances the physical layer within the modulation by optimizing its responses to sudden changes in the cellular connection. The MNP 10EC protocol layer implemented in the modem software improves data error identification/correction and maximizes data throughput by dynamically adjusting speed and packet size based on signal quality and data error performance.
2.5 FAX CLASS 1 OPERATION
Facsimile functions operate in response to fax class 1 commands when +FCLASS=1. In the fax mode, the on-line behavior of the modem is different from the data (non-fax) mode. After dialing, modem operation
is controlled by fax commands. Some AT commands are still valid but may operate differently than in data modem mode. Calling tone is generated in accordance with T.30.
2.6 VOICE/AUDIO MODE
Voice and audio functions are supported by the Voice Mode. Voice Mode includes three submodes: Online Voice Command Mode, Voice Receive Mode, and Voice Transmit Mode.
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2.6.1 Online Voice Command Mode
This mode results from the connection to the telephone line or a voice/audio I/O device (e.g., microphone, speaker, or handset) through the use of the +FCLASS=8 and +VLS commands. After mode entry, AT commands can be entered without aborting the connection.
2.6.2 Voice Receive Mode
This mode is entered when the +VRX command is active in order to record voice or audio data input at the RXA_L1 pin, typically from a microphone/handset or the telephone line.
Received analog voice samples are converted to digital form and compressed for reading by the host. AT commands control the codec bits-per-sample rate.
Received analog mono audio samples are converted to digital form and formatted into 8-bit unsigned linear or µ-Law PCM format for reading by the host. AT commands control the bit length and sampling rate. Concurrent DTMF/tone detection is available.
2.6.3 Voice Transmit Mode
This mode is entered when the +VTX command is active in order to playback voice or audio data to the TXA1_L1 output, typically to a speaker/handset or to the telephone line. Digitized audio data is converted to analog form then output to the TXA1_L1 output.
2.6.4 Tone Detectors
The tone detector signal path is separate from the main received signal path thus enabling tone detection to be independent of the configuration status. In Tone Mode, all three tone detectors are operational.
2.6.5 Speakerphone Modes
Speakerphone modes are selected in voice mode with the following commands:
Speakerphone ON/OFF (+VSP). Microphone Gain (+VGM)=<gain>.
unsigned octet where values greater than 128 indicate a gain larger than nominal and values smaller than 128 indicate a gain smaller than nominal.
Speaker Gain (+VGS=<gain>).
octet where values greater than 128 indicate a gain larger than nominal and values smaller than 128 indicate a gain smaller than normal.
This command turns the Speakerphone function ON (+VSP = 1) or OFF (+VSP = 0).
This command sets the microphone gain of the Speakerphone function. <gain> is an
This command sets the speaker gain of the Speakerphone function. <gain> is an unsigned
2.7 SIMULTANEOUS AUDIO/VOICE AND DATA (AudioSpan)
The modem can operate in AudioSpan Mode if the remote modem is also configured for AudioSpan Mode operation. AT commands are used to select the AudioSpan Mode, to enable automatic AudioSpan modulation selection or select a
specific AudioSpan modulation, and to enable AudioSpan data burst operation. V.61 modulation supports 4800 bps data speed with audio, and a data-only speed of 4800 bps. The AudioSpan audio interface defaults to the local handset connected to the modem and can be configured to interface
through the modem microphone and speaker pins to support use of a headset or a speakerphone.
2.8 HOST-BASED DSVD MODE
Host-based DSVD operation is enabled by the -SSE or -SMS command. In Host-based DSVD Mode, the modem supports the transfer of data and voice occurs simultaneously during a data connection.
2.9 FULL-DUPLEX SPEAKERPHONE (FDSP) MODE
The modem operates in FDSP mode when +FCLASS=8 and +VSP=1 (see 2.6.5). In FDSP Mode, speech from a microphone or handset is converted to digital form, shaped, and output to the telephone line
through the line interface circuit. Speech received from the telephone line is shaped, converted to analog form, and output to the speaker or handset. Shaping includes both acoustic and line echo cancellation.
2.10 VOICEVIEW
Voice and data can be alternately sent and received in a time-multiplexed fashion over the telephone line whenever the +FCLASS=80 command is active. This command and other VoiceView commands embedded in host communications
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