| 摘要 |
Voice data are enclosed between a header code and tail code to form a voice frame which is interposed into an ordinary HDLC frame for transmission as a composite frame. The header code is a code that does not occur in an ordinary HDLC frame and can therefore be reliably detected on the receiving side. During transmission of voice data, the clocks on the HDLC transmitting and receiving sides are stopped, thereby temporarily halting HDLC transmission. |
