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| 型号： | RH56D-PCI |
| 厂商： | Electronic Theatre Controls, Inc. |
| 英文描述： | MODEM DEVICE FAMILY FOR DESKTOP APPLICATIONS |
| 中文描述： | 调制解调器设备家庭桌面应用程序 |
| 文件页数： | 17/60页 |
| 文件大小： | 357K |
| 代理商： | RH56D-PCI |
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RH56D-PCI Modem Designer’s Guide
1213
Conexant
2-1
Conexant Proprietary Information
2. TECHNICAL SPECIFICATIONS
2.1 ESTABLISHING DATA MODEM CONNECTIONS
Dialing
DTMF Dialing.
DTMF dialing using DTMF tone pairs is supported in accordance with ITU-T Q.23. The transmit tone level
complies with Bell Publication 47001.
Pulse Dialing.
Pulse dialing is supported in accordance with EIA/TIA-496-A.
Blind Dialing.
The modem can blind dial in the absence of a dial tone if enabled by the X0, X1, or X3 command.
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 represented by
the country profile currently in affect.
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).
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 speed 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.
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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: |
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