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| 型号： | MT9234MU-CDC-CP |
| 厂商： | Multi-Tech Systems |
| 文件页数： | 56/66页 |
| 文件大小： | 0K |
| 描述： | MODEM V.92 DATA/FAX USB WORLD 25 |
| 标准包装： | 1 |
| 系列： | MultiMobile™ USB |
| 数据格式： | V.34，V.92 |
| 安装类型： | 台式 |
| 封装/外壳： | 3.1" L x 1.3" W x 1.0" H（80mm x 30mm x 25mm） |
| 包装： | 散装 |
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Chapter 4 – Voice Commands
+VPP
Description:
Syntax:
Values:
Result Codes:
+VPR
Description:
Syntax:
Values:
Result Codes:
Enable or Disable Voice Mode Packet Protocol
The +VPP command enables and disables the Packet protocol for Voice mode
operation, and handles the new unsolicited Voice mode result codes. The Packet
protocol is used to detect lost octets on the modem-to-PC serial link, and to recover
the lost octets by requesting retransmission. The Packet protocol assumes that the
data corruption is not a problem on the communications link, the last octet sent will
never be lost due to data overrun (i.e., that the newer octets always overwrite
previous octets in the communications input buffer, a common UART design feature).
Several PC processes can cause serial input channel neglect for longer than the
Protocol time between asynchronous characters (typically less than 521
microseconds), and data loss can occur. If a character is lost in the received data,
the playback of the voice data may be impaired or lost. If a character is lost in the
final result code, the connection may fail. The Packet protocol permits recovery from
such data loss.
AT+VPP=<enable>
0, 1; (2–255 reserved for future standards)
OK if the modem accepts the command.
ERROR if the <enable> value is out of range.
Select DTE/DCE Interface Rate (Turn Off Autobaud)
The +VPR command causes the modem to select between various fixed modem-to-
PC interface rates and autobauding. The selected fixed interface rate stays in effect
until the modem selects another interface rate or autobauding, or until the modem
returns to autobauding on the expiration of the Inactivity Timer. The newly selected
rate takes effect after the modem returns the OK result code.
AT+VPR=<rate>
+VPR=0 select autobauding
+VPR=1 select 2400 bps
+VPR=2 select 4800 bps
+VPR=3 select 7200 bps
+VPR=4 select 9600 bps
+VPR=5 select 12000 bps
+VPR=6 select 14400 bps
+VPR=7 select 16800 bps
+VPR=8 select 19200 bps
If the modem claims support for autobauding (+VPR=0), it means that the modem
can accept AT commands at 2400 bps at all times while in Voice command mode
and with +VPR=0.
OK if the modem accepts the command.
ERROR if the <rate> value is out of range.
Multi-Tech Systems, Inc. AT Commands for the MultiModem & SocketModem MT9234 Series (S000434H)
56
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相关代理商/技术参数 |
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| MT9234MU-CDC-XR | 功能描述:MODEM V.92 DATA/FAX USB WORLD RoHS:是 类别:计算机，办公室 - 元件，配件 >> 调制解调器 系列:MultiMobile™ USB 标准包装:1 系列:MultiModem® ZBA 数据格式:V.34，V.92 波特率:- 电源电压:- 安装类型:台式 封装/外壳:5.7" L x 4.3" W x 1.0" H（145mm x 109mm x 25mm） 供应商设备封装:- 包装:散装 |
| MT9234MU-CDC-XR-CP | 制造商:Multi-Tech Systems 功能描述:V.92 DATA/FAX WORLD MODEM (USB) (25 MODEMS) - Bulk |
| MT9234SMI | 制造商:MULTI TECH SYSTEM 功能描述: |
| MT9234SMI-92 | 功能描述:拨号模块 V.92 Serial Data V.34 FAX - 5V RoHS:否 制造商:Multi-Tech Systems 产品:Data / Fax Modems 最大数据速率:56 kbps 存储类型:Flash 接口类型:Serial 工作电源电压:3.3 V 工作电源电流:95 mA 功耗:310 mW 最大工作温度:+ 70 C 尺寸:64.5 mm x 26.5 mm x 17 mm |
| MT9234SMI-92.R1 | 功能描述:拨号模块 V.92 Serial Data V.34 Fax 5V RoHS:否 制造商:Multi-Tech Systems 产品:Data / Fax Modems 最大数据速率:56 kbps 存储类型:Flash 接口类型:Serial 工作电源电压:3.3 V 工作电源电流:95 mA 功耗:310 mW 最大工作温度:+ 70 C 尺寸:64.5 mm x 26.5 mm x 17 mm |
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