- 您现在的位置：买卖IC网 > PDF目录376309 > RH56D-PCI (Conexant Systems, Inc.) Host Controlled V.90/K56flex Modem device PDF资料下载
参数资料
| 型号： | RH56D-PCI |
| 厂商： | Conexant Systems, Inc. |
| 英文描述： | Host Controlled V.90/K56flex Modem device |
| 中文描述： | 主机控制V.90/K56flex调制解调器设备 |
| 文件页数： | 12/60页 |
| 文件大小： | 357K |
| 代理商： | RH56D-PCI |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页当前第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页
RH56D-PCI Modem Designer’s Guide
1-6
Conexant
1213
Conexant Proprietary Information
1.3 TECHNICAL OVERVIEW
1.3.1 General Description
The RH56D-PCI modem provides the processing core for a complete system design featuring data/fax modem, voice/TAM,
and speakerphone support, depending on specific model (Table 1-1).
Note:
The term, “RH56D-PCI Device Set”, refers to the family of modem models listed in Table 1-1.
Modem operation, including dialing, call progress, telephone line interface, telephone handset interface, audio 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, telephone handset interface (optional), and audio interface (optional) to complete the system.
1.3.2 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, and operating system interface functions.
2. Modem data pump control. Binary executable code controlling MDP operation is downloaded as required during
operation.
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.
1.3.3 Operating Modes
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 slower 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.
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.
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.
相关PDF资料 |
PDF描述 |
|---|---|
| RHF-24(2) | LOW-POWER DISSIPATION ADSL LINE DRIVER |
| RI-60 | Ultra-miniature dry-reed switch hermetically sealed in a gas-filled glass envelope |
| RI60 | Ultra-miniature dry-reed switch germetically sealed in a gas-dilled glass envelope |
| RI-ANT-S01C-00 | SERIES 2000 ANTENNAS |
| RI-I01-110A | Tag-it HF Transponder Inlay Square |
相关代理商/技术参数 |
参数描述 |
|---|---|
| RH56M-4/122156 | 制造商:ebm-papst Inc 功能描述: |
| RH56M-4/210928 | 制造商:ebm-papst Inc 功能描述: |
| RH56M-6/127804 | 制造商:ebm-papst Inc 功能描述: |
| RH56M-6/204689 | 制造商:ebm-papst Inc 功能描述: |
发布紧急采购，3分钟左右您将得到回复。