奕誠科技有限公司

ADICTI  international  corporation 
首頁 | 公司介紹 | 產品介紹 | 服務與支援 | 聯絡我們
　

◆產品介紹
>>語音通訊卡
>>語音系統
>>網路電話
電話語音卡

ISDN PRI(30B+1D)
數位語音電話卡 LMI30LT

ISDN PRI(30B+1D)數位語音電話卡

技術規範

需求配備
  • BUS：PCI 32-bit Bus
  • PC：PentiumⅡ以上之相容電腦
連外介面
  • 電話接頭RJ-11，BNC接頭供選擇
硬體規範
  • 輸入電壓：+5V、+12V
多功能之數位信號處理器（DSP）模組
  • 支援G.723.1、G.729A、G.711、G.726等編碼演算法
  • G.723.1(including Annex A VAD/CNG) and Windows95 True Speech 8.5 compatibility.
  • Full/Half duplex voice and compression channels on real time.
  • Acoustic Echo Cancellation concurrent with True Speech and G.723.1 operation.
  • DTMF and Tone Generation.
  • DTMF and Programmable Tone Detection.
電話介面
  • Network clock rate
 2.048 Mb/s ±50 ppm
  • Internal clock rate
    • 2.048 Mb/s ±32 ppm
  • Level


    • 2.37V (nominal) for 75 ohm or 3.0V (nominal) for 120 ohm lines
  • Pulse width
    • 244 ns (nominal)
  • Line impedance

    • 75 ohm, unbalanced or 120 ohm, balanced
    • Other electrical
      　characteristics
    		 Complies with CCITT Rec. G.703
  • Framing
    • CCITT G.704-1988 with CRC4
  • Line coding
    • HDB3
  • Clock and data recovery

    • Complies with CCITT Rec. G.823-1988
  • Jitter tolerance


    • Complies with CCITT Rec. G.823, G.737, G.739, G.742-1988
  • Connectors

    • BNC for 75 ohm or RJ-11 for 120 ohm lines
  • Telephony bus connector

    • H.100-style 68-pin fine pitch card edge connector
  • Loopback


    • 應用程式函數庫支援擴充介面語音編碼、壓縮／解壓縮方式
    Supports switch selectable local analog loopback and software selectable local digital loopback

    　

       
     TEL: (04) 2471-7791    FAX: (04) 2471-7731    E-mail: adicti@ms41.hinet.net

    Web Phone Call me!   <-----免費客服網頁電話----->   skype Call me!

    版權所有奕誠科技有限公司，未經同意請勿轉載