Advanced Data Communication Control Procedures: Difference between revisions
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{{Short description|Computer networking protocol}} |
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In [[telecommunication]], '''Advanced Data Communication Control Procedures''' (or '''Protocol''') (ADCCP) is a [[bit]]-oriented [[data link layer]] [[protocol (computing)|protocol]] used to provide [[Point-to-point (telecommunications)|point-to-point]] and [[point-to-multipoint]] [[transmission (telecommunications)|transmission]] of [[data frame]]s that contain [[error control]] [[information]]. It places data on a network and ensures proper delivery to a destination. ADCCP is based on the IBM's SDLC protocol. The HDLC by ISO and LAPB by ITU/CCITT are based on ADCCP.{{Fact|date=June 2008}} |
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In [[telecommunication]], '''Advanced Data Communication Control Procedures''' (or '''Protocol''') ('''ADCCP''') is a [[Bit-oriented protocol|bit-oriented]] [[data link layer]] [[Communication protocol|protocol]] developed by the [[American National Standards Institute]]. It is functionally equivalent to the ISO [[High-Level Data Link Control]] (HDLC) protocol.<ref>{{harvnb|Friend|Fike|Baker|Bellamy|1988|p=191}}</ref> |
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Although the ISO and ANSI standards writers coordinated their work, so the differences between the standards are mainly editorial, there is one meaningful difference: ADCCP's definition of the basic subset required to implement balanced asynchronous mode includes the RSET frame, while HDLC makes it optional.<ref>{{harvnb|NBS|1980|p=6|loc=§3.0 ADCCP classes of procedures}}</ref> |
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ADCCP is an [[American National Standards Institute|ANSI]] standard, X3.66, derived from [[IBM]]'s [[Synchronous Data Link Control]] (SDLC) protocol, and is functionally equivalent to the ISO [[High-Level Data Link Control]] (HDLC) standard.<ref>{{harv|Friend|1988|p=191}}.</ref> |
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One major difference between the two is the unnumbered (U) format. When extended (7-bit) sequence numbers are used, I and S frames have two-byte control fields. Like early versions of HDLC,<ref>{{harvnb|ISO|1984|p=18|loc=§7.4 Extended control field formats}}</ref> ADCCP specifies a 2-byte control field format with the P/F flag duplicated.<ref>{{harvnb|ANSI|1979|p=28|loc=§5.2.2 Extended control field}}</ref> Later HDLC specifications, in particular ISO/IEC 13239, changed that to specify that U frames have 1-byte control fields in all cases. |
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ADCCP has 3 main modes - NRM (Normal Response mode akin to SDLC), ABM (Asynchronous Balanced mode - akin to HDLC) and ARM (Asynchronous Response mode) |
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{| class="wikitable" style="text-align:center" |
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|+ADCCP control fields |
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!colspan=8| First byte ||colspan=8| Second byte ||rowspan=2| Description |
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|- |
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! 0 || 1 || 2 || 3 || 4 || 5 || 6 || 7 |
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! 0 || 1 || 2 || 3 || 4 || 5 || 6 || 7 |
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|- |
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| 0 ||colspan=3| N(S) || P/F ||colspan=3| N(R) ||colspan=8 rowspan=3 bgcolor=lightgrey| ||align=left| I frame, N(S) is a 3-bit send sequence number |
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|- |
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| 1 || 0 ||colspan=2| type || P/F ||colspan=3| N(R) ||align=left| S frame, N(R) is a 3-bit receive sequence number |
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|- |
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| 1 || 1 ||colspan=2| type || P/F ||colspan=3| type ||align=left| U frame |
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|- |
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| 0 ||colspan=7| N(S) || P/F ||colspan=7| N(R) ||align=left| Extended I frame, N(S) is a 7-bit sequence number |
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|- |
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| 1 || 0 ||colspan=2| type ||colspan=4 bgcolor=lightgrey| —0— || P/F ||colspan=7| N(R) ||align=left| Extended S frame, N(R) is a 7-bit sequence number |
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|- |
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| 1 || 1 ||colspan=2| type || P/F ||colspan=3| type || P/F ||colspan=7 bgcolor=lightgrey| —0— ||align=left| Extended U frame (ADCCP only) |
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|} |
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==See also== |
==See also== |
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* [[Data link layer]] |
* [[Data link layer]] |
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* [[High-Level Data Link Control]] |
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* [[Self-synchronizing code]] |
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==References== |
==References== |
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*{{cite book |
*{{cite book |
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|last1=Friend |
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|first1=George E. |
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|first2=John L. |
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|coauthors=John L. Fike, H. Charles Baker, John C. Bellamy |
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|last2=Fike |
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|first3=H. Charles |
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|last3=Baker |
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|first4=John C. |
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|last4=Bellamy |
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|title=Understanding Data Communications |
|title=Understanding Data Communications |
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|edition=2nd |
|edition=2nd |
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|year=1988 |
|year=1988 |
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|publisher=Howard W. Sams & Company |
|publisher=Howard W. Sams & Company |
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|location=Indianapolis |
|location=Indianapolis |
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|isbn=0-672-27270-9}} |
|isbn=0-672-27270-9 |
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}} |
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*{{cite book |
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|title=Guideline for implementing advanced data communication control procedures (ADCCP) |
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| ⚫ | |||
|publisher=National Bureau of Standards |
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|date=26 September 1980 |
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|id=FIPS PUB 78 |
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|ref={{harvid|NBS|1980}} |
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|url=https://archive.org/details/federalinformati78nati |
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}} |
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*{{cite book |
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|title=ISO 4335:1984 Data Communication—High Level Data Link Control Procedures—Consolidation of Elements of Procedures |
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|ref={{harvid|ISO|1984}} |
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|url=https://law.resource.org/pub/in/bis/S04/is.11418.2.1986.pdf |
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|archive-url=https://web.archive.org/web/20190323134103/https://law.resource.org/pub/in/bis/S04/is.11418.2.1986.pdf |
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|archive-date=23 March 2019 |
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|url-status=live |
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}} [https://archive.org/details/gov.in.is.11418.2.1986 Alt URL] |
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*{{cite book |
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|title=ANSI X3.66-1979: American National Standard for advanced data communication procedures (ADCCP) |
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|publisher=[[American National Standards Institute]] |
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|date=9 January 1979 |
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|id=FIPS PUB 71-1980 |
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|url=https://archive.org/details/federalinformati7119nati |
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|ref={{sfnRef|ANSI|1979}} |
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}} |
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| ⚫ | |||
[[Category:Link protocols]] |
[[Category:Link protocols]] |
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Latest revision as of 21:37, 19 August 2023
In telecommunication, Advanced Data Communication Control Procedures (or Protocol) (ADCCP) is a bit-oriented data link layer protocol developed by the American National Standards Institute. It is functionally equivalent to the ISO High-Level Data Link Control (HDLC) protocol.[1]
Although the ISO and ANSI standards writers coordinated their work, so the differences between the standards are mainly editorial, there is one meaningful difference: ADCCP's definition of the basic subset required to implement balanced asynchronous mode includes the RSET frame, while HDLC makes it optional.[2]
One major difference between the two is the unnumbered (U) format. When extended (7-bit) sequence numbers are used, I and S frames have two-byte control fields. Like early versions of HDLC,[3] ADCCP specifies a 2-byte control field format with the P/F flag duplicated.[4] Later HDLC specifications, in particular ISO/IEC 13239, changed that to specify that U frames have 1-byte control fields in all cases.
| First byte | Second byte | Description | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | |
| 0 | N(S) | P/F | N(R) | I frame, N(S) is a 3-bit send sequence number | ||||||||||||
| 1 | 0 | type | P/F | N(R) | S frame, N(R) is a 3-bit receive sequence number | |||||||||||
| 1 | 1 | type | P/F | type | U frame | |||||||||||
| 0 | N(S) | P/F | N(R) | Extended I frame, N(S) is a 7-bit sequence number | ||||||||||||
| 1 | 0 | type | —0— | P/F | N(R) | Extended S frame, N(R) is a 7-bit sequence number | ||||||||||
| 1 | 1 | type | P/F | type | P/F | —0— | Extended U frame (ADCCP only) | |||||||||
See also[edit]
References[edit]
- Friend, George E.; Fike, John L.; Baker, H. Charles; Bellamy, John C. (1988). Understanding Data Communications (2nd ed.). Indianapolis: Howard W. Sams & Company. ISBN 0-672-27270-9.
- Guideline for implementing advanced data communication control procedures (ADCCP). National Bureau of Standards. 26 September 1980. FIPS PUB 78.
- ISO 4335:1984 Data Communication—High Level Data Link Control Procedures—Consolidation of Elements of Procedures (PDF). Archived (PDF) from the original on 23 March 2019. Alt URL
- ANSI X3.66-1979: American National Standard for advanced data communication procedures (ADCCP). American National Standards Institute. 9 January 1979. FIPS PUB 71-1980.
This article incorporates public domain material from Federal Standard 1037C. General Services Administration. Archived from the original on 2022-01-22.
