词条 | Link Access Procedures, D channel |
释义 |
In Integrated Services Digital Network (ISDN) telecommunications, Link Access Procedures, D channel is part of the network's communications protocol which ensures that messages are error free and executed in the right sequence. LAPD is the second layer protocol on the ISDN protocol stack in the D channel (the ISDN channel in which the control and signalling information is carried). LAPD standards are specified in ITU-T Q.920 and Q.921. Its development was heavily based on High-Level Data Link Control. External links
2 : Link access protocols|Integrated Services Digital Network |
随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识,基本涵盖了大多数领域的百科知识,是一部内容自由、开放的电子版国际百科全书。