VP-894S四线计算机语音卡
      
2003/01/03

      
| 电 气 特 性 | 规 格 | 
| On-board CPU  | Intel 8088  | 
| On-board Buffer | 256Kbyte DRAM | 
| Shared Buffer | 32Kbyte SRAM | 
| Voice Digitization | μ-Law PCM with Compression  | 
| Voice Data Rate | 4.9K-16Kbits/sec  | 
| Voice DSP | DALLAS 2132A  | 
| Bus Structure | ≧8Mhz,8 bits  | 
| Interrupt Level | one for all ports  | 
| I/O Address | fixed  | 
| Max.Boards/System | 16 | 
| Phone Interface | analog | 
| Start Method  | loop start | 
| Connector | 4×RJ11 | 
| Impedance | 600Ω / 900Ω | 
| Frequency Response | 300-3.4khz @16kbps | 
| Ring Detection | 40-130Vms,15-68Hz | 
| Loop Current | 20-120ma | 
| Local Phone Leads | Equipped | 
| Outbound Dialing | DTMF&Pulse | 
| Inbound Reception  | DTMF&Pulse | 
| Crosstalk  | <50dB | 
| CPM Detection | Yes  | 
| Internal Bridging | Adjacent Channels | 
| Power Requirement | ±5Vdc | 
| Operating Temperature | 0°Cto +50°C | 
| Storage Temperature | -10°Cto +60°C  | 
| Humidity | 10%to 80%non-condensing  | 
| Certifications | CE,FCC&BZT  | 
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