This chart reflects many interfaces and protocols that TELE-WORX consults on. This chart is not intended to be exhaustive; only the primary protocol acronyms are indicated above. Further, several protocols in this chart reflect encyclopedic collections of functions that may span multiple layers. The chart above, therefore, is intended to be illustrative and not necessarily definitive.

Assignment of a protocol stack to a particular transport technology that is supported by a particular network management application is not as rigorous as this chart may suggest. For example, there are many instances of SONET network equipment managed with TL1 or SNMP through a TCP/IP stack.


Assignment of a protocol to a layer is generally made according to its functionality when no formal assignment has been documented by a standards body or industry forum. Reference to contemporary writing about interfaces and protocols exposes significant disagreements even among the experts about layer assignment. In the case of Ethernet, the philosophy of the designers was not entirely consistent with the OSI reference model of layers and layer functionality, and several protocols in the Ethernet suite spill into the adjacent layer of OSI functions.

Technical Standards - Read and Understood:

ANSI Standards

    T1.102 Digital Hierarchy - Electrical Interfaces

    T1.105 SONET - Optical Interface Rates and Formats Specifications

    T1.105.04 SONET - Data Communication Channel Protocol and Architecture

    T1.105.06 SONET - Physical Layer Specifications

    T1.107 Digital Hierarchy - Formats Specifications

    T1.107a Digital Hierarchy - Supplement to Formats Specifications (DS3 format


    T1.204 OAM&P - Lower-layer protocols for TMN interfaces between OS and NE

    T1.208 OAM&P - Upper layer protocols for TMN interfaces between OS and NE

IEEE Standards                                                 click here - all familiar IEEE 802 Standards

    IEEE 802-2001 (R2007) IEEE Standard for Local and Metropolitan Area Networks:

            Overview and Architecture

    IEEE 802a-2003 (R2007) IEEE Standard for Local and Metropolitan Area Networks:

            Overview and Architecture Amendment 1: Ethertypes for Protype and Vendor-

            Specific Protocol Development

    IEEE 802b-2004 (R2007) IEEE Standard for Local and Metropolitan Area Networks -

            Overview and Architecture - Amendment 2: Registration of Object Identifiers

    IEEE 802.2-1998 (ISO/IEC 8802-2:1998), IEEE Standard for Information technology--

            Telecommunications and information exchange between systems--Local and

            metropolitan area networks--Specific requirements--Part 2: Logical Link Control

    IEEE 802.3-2008 IEEE Standard for Information technology-Specific requirements -

            Part 3: Carrier Sense Multiple Access with Collision Detection (CMSA/CD)

            Access Method and Physical Layer Specifications

    IEEE 802.11-2007 IEEE Standard for Information technology-Telecommunication and

            information exchange between systems-Local and metropolitan area networks-

            Specific requirements - Part 11: Wireless LAN Medium Access Control (MAC)

            and Physical Layer (PHY) Specifications

    IEEE 802.16-2004 IEEE Standard for Local and metropolitan area networks Part 16:

            Air Interface for Fixed Broadband Wireless Access Systems

IETF Standards                                                        click here - all familiar IETF Standards

    STD 5 Internet Protocol

    STD 6 User Datagram Protocol

    STD 7 Transmission Control Protocol

    STD 8 Telnet Protocol

    STD 9 File Transfer Protocol

    STD 12 Network Time Protocol

    STD 35 ISO Transport Service on top of the TCP Version 3

    STD 51 The Point-to-Point Protocol (PPP)

    STD 62 Simple Network Management Protocol Version 3 (SNMPv3)

ITU Standards                                         click here - all familiar ITU-T X-Series Standards

    X.200 / ISO 7498-1 OSI - Basic Reference Model: The Basic Model

ITU-T Information Technology - OSI - Physical Layer Standards

    X.211 Physical service definition

ITU-T nformation Technology - OSI - Data Link Layer Standards

    X.212 / ISO 8886 Data link service definition

    X.222 Use of X.25 LAPB-compatible data link procedures to provide the OSI

            connection-mode data link service

ISO Information Technology - OSI - Network Layer Standards

    8648 Internal organization of the network layer

    9542 End system to intermediate system routing exchange protocol for use

            in conjunction with the protocol for providing the connectionless-mode

            network service (ISO 8473).

    10589 Intermediate system to intermediate system intra-domain routing

            exchange protocol  for use in the conjunction with the protocol for

            providing the connectionless-mode network service (ISO 8473).

    10747 Protocol exchange of intra-domain routing information among

            intermediate systems to support forwarding of ISO-8473 PDUs.

ITU-T Information Technology - OSI - Network Layer Standards

    X.213 / ISO 8348 Network service definition

    X.213 / ISO 8348 Add. 1: Connectionless mode transmission

    X.213 / ISO 8348 Add. 2: Network layer addressing

    X.223 / Use of X.25 to provide connection mode network service to CCITT


    X.233 / ISO 8473 Protocol for providing the connectionless mode network


    X.233 / ISO 8473 Add. 3: Subnetwork dependent convergence function (SNDCF)

ITU-T Information Technology - OSI - Transport Layer Standards

    X.25 Interfaces between data terminal equipment (DTE) and data circuit

            terminating equipment (DCE) for terminals operating in the packet mode

            and connected to public dayta networks by dedicated circuit

    X.214 / ISO 8072 Transport service definition

    X.224 / ISO 8073 Protocol for providing the connection-mode transport service

    X.224 / ISO 8073 Add. 2 Operation of Class 4 over connectionless network

            service (CLNS).

    X.234 / ISO 8602 Connectionless-mode transport protocol

ITU-T Information Technology - OSI - Session Layer Standards

    X.215 / ISO 8326 Session service definition

    X.215 / ISO 8326 Add. 2 Incorporation of unlimited user data

    X.225 / ISO 8327 Session protocol specification for OSI

ITU-T Information Technology - OSI - Presentation Layer Standards

    X.208 / ISO-8824 Specification of Abstract Syntax Notation One (ASN.1)

    X.209 / ISO-8825 Specification of Basic Encoding Rules for ASN.1

    X.216 / ISO 8822 Presentation service definition

    X.226 / ISO 8823 ) Presentation protocol specification

ISO Information Technology - OSI - Application Layer Standards

    8571-1 File transfer, access and management part 1 - General introduction

    8571-1 File transfer, access and management part 2 - Virtual filestore definition

    8571-3 File transfer, access and management part 3 - File service definition

    8571-4 File transfer, access and management part 4 - File protocol specification

ITU-T Information Technology - OSI - Application Layer Standards

    X.207 / ISO 9545 Application layer structure

    X.217 / ISO-8649 Service Definition for the Association Control Service Element

    X.219 / ISO-9072-1 Remote Operations: Model, notation and service definition

    X.227 / ISO-8650 Connection-Oriented Protocol Specification for the association

            control service element

    X.229 / ISO-9072-2 Remote Operations: Protocol Specification

    X.500 / ISO 9594-1 The Directory: Overview of concepts, models and services

    X.710 / ISO-9595 Common Management Information Services

    X.711 / ISO-9596-1 Common Management Information Protocol Specification

ITU-T Signaling System No. 7

    Q.711 Functional description of the signaling connection control part

    Q.712 Definition and function of signaling connection control part


    Q.713 Signaling connection control part formats and codes

    Q.714 Signaling connection control part procedures

ITU-T Synchronous Digital Hierarchy

    G.773 Protocol suites for Q-interfaces for management of transmission


    Q.811 Lower layer protocol profiles for the Q3 interface.

    Q.812 Upper layer protocol profiles for the Q3 interface.

Other Technical Documents - Read and Understood:


    AT&T Compatibility Bulletin No. 149, "Maintenance Standards for Digital

            Transmission Systems", Issue 3, Sep. 1, 1986

            See also Pub 49001, Pub 43804 (TBOS Telemetry Byte-Oriented Serial Protocol)

    TR-54016 Requirements For Interfacing Digital Terminal Equipment To Services

            Employing the Extended Superframe Format, AT&T, September 1989

            (TABS Telemetry Asynchronous Block Serial Protocol)


    RFC 768 User Datagram Protocol

    RFC 791 Internet Protocol

    RFC 792 Internet Protocol Control Message Protocol

    RFC 793 Transmission Control Protocol

    RFC 854 Telnet Protocol Specification

    RFC 855 Telnet Option Specifications

    RFC 891 DCN Local-Network Protocols

    RFC 894 A Standard for the Transmission of IP Datagrams over Ethernet Networks

    RFC 919 Broadcasting Internet Datagrams

    RFC 922 Broadcasting Internet Datagrams in the Presence of Subnets

    RFC 950 Internet Standard Subnetting Procedure

    RFC 959 File Transfer Protocol

    RFC 1006 ISO Transport Service on top of the TCP

    RFC 1042 Standard for Transmission of IP Datagrams over IEEE 802 Networks

    RFC 1055 Nonstandard for Transmission of IP Datagrams over Serial Lines (SLIP)

    RFC 1112 Host Extensions for IP Multicasting

    RFC 1305 Network Time Protocol (v.3) Specification, Implementation and Analysis

    RFC 1661 The Point-to-Point Protocol (PPP)

    RFC 2126 ISO Transport Service on top of TCP (ITOT)

    RFC 2328 OSPF Version 2

    RFC 2453 RIP Version 2

    RFC 3411 An Architecture for Describing Simple Network Management Protocol

            (SNMP) Management Frameworks

    RFC 3412 Message Processing and Dispatching for the Simple Network Management

            Protocol (SNMP)

    RFC 3413 Simple Network Management Protocol (SNMP) Applications

    RFC 3414 User-based Security Model (USM) for version 3 of the Simple Network

            Management Protocol (SNMPv3)

    RFC 3415 View-based Access Control Model (VACM) for the Simple Network

            Management Protocol (SNMP)

    RFC 3416 Version 2 of the Protocol Operations for the Simple Network Management

            Protocol (SNMP)

    RFC 3417 Transport Mappings for the Simple Network Management Protocol (SNMP)

    RFC 3418 Management Information Base (MIB) for the Simple Network Management

            Protocol (SNMP)


    NSIF-033-1999 Requirements for the TCP/IP Protocol Suite on the SONET Access


    SIF-004-1996 TARP/500: The TARP and X.500 Directory Services Interworking


    SIF-009-1997 NE-NE Remote Login Implementation Requirements Specification

    SIF-011-1998 FTAM Profile for SONET Operations Communications

    SIF-019-1998 Interoperability Requirements for TARP



    GR-199 TL1 Memory Administration Messages

    GR-811 OTGR Section 12: Operations Application Messages - TL1 Messages Index

    GR-831 OTGR Section 12.1: Operations Application Messages - Language For

            Operations Application Messages

    GR-833 TL1 Surveillance and Maintenance Messages

    GR-834 Network Maintenance: Access and Testing Messages

    GR-1093 Generic State Requirements for Network Elements

    TR-TSY-000827 OTGR Section 11.1: Generic Operations Interface - Non-OSI

            Communications Architecture

    TR-NWT-000835 OTGR Section 12.5: Network Element and Network System Security

            Administration Messages

    SR-NWT-002723 Applicable TL1 Messages for SONET Network Elements


    GR-828 OTGR Section 11.2: Operations Technology Generic Requirements (OTGR):

            Generic Operations Interface - OSI Communications Architecture

    SR-2751 OCS OS-NE Interface Support for the OSI/CMISE Protocol Stack

    SR-3317 OPS/INE to Network Element Generic OSI/CMISE Interface Support

Acronyms on this Page:

ANSI - American national standards institute

IETF - internet engineering task force

IP - internet protocol

ITU-T - International Telecommunication Union - Telecommunication Standardization


NSIF - network services integration forum

OSI - open systems interconnection

RFC - request for comment

SIF - SONET interoperability forum

(I’m working on the acronyms...)

Key Concepts:

    OSI - Open Systems Interconnection

    Seven Functional Layers - Physical, Data-Link, Network, Transport, Session, Presentation, Application

                                                 ... corresponding roughly to bits, frame, packet, segment and the data

    Ethernet and the Internet

“Foundation” Standards:

    ITU-T X.200 / ISO 7498-1 OSI - Basic Reference Model: The Basic Model

    IEEE 802 IEEE Standard for LANs and MANs: Overview and Architecture

    IETF STD 5, 6, 7 Internet Protocol, User Datagram Protocol, Transmission Control Protocol

Expertise Summary Chart: