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From: m15368%mwvm@MITRE.ARPA.UUCP
Newsgroups: mod.protocols.tcp-ip
Subject: (none)
Message-ID: <8704032029.AA00510@mitre.ARPA>
Date: Fri, 3-Apr-87 15:29:31 EST
Article-I.D.: mitre.8704032029.AA00510
Posted: Fri Apr  3 15:29:31 1987
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 To: CERF%A.ISI.EDU    CERF at A.ISI.EDU
 From: Steve Silverman
 Subject: Layer 2 multiplexing on ISDN
     
     
     
 The proposed Frame Relay service of ISDN does do layer 2 multiplexing.
 In LAPD, there is a 2 byte address containing a 6 bit SAPI and a 7 bit TEI
 (Terminal Equipment Identifier).  These 2 fields are combined into a
 13 bit DLCI (Data Link Connection Identifier) which would be handled
 similarly to the LCN in X.25.  It would be mapped and set in each node as a
 frame progressed through the network.  Then a new CRC would be calculated
 and inserted.
 *
 *        Steve
     
 Cc: TCP-IP@SRI-NIC.ARPA                   MITRE(MCKEE)      MCKEE at MITRE