Link Access Procedures, D channel

Link Access Procedures, D channel

Link Access Procedures on the D channel (LAPD), specified in ITU-T Q.920 and ITU-T Q.921, is the second layer protocol on the ISDN protocol stack in the D channel.

It is heavily based on HDLC.

External links

*http://www.protocols.com/pbook/pdf/isdn.pdf


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