Figure B-2. Frame Relay Network using Virtual Circuits | ADTRAN 550

Appendix B. OSI Model and Frame Relay Technology Overview

gotiation of the bandwidth parameters during the circuit setup. SVCs are currently unavailable from most frame relay providers, and ATLAS only supports PVCs.

PVC Physical Connections

Figure B-1 illustrates three PVCs being delivered over one physical circuit. The frame relay switch within the frame relay provider’s circuit makes a physical connection for each PVC. Each of the PVCs could connect to a dif- ferent physical location at the other end of the circuit. Figure B-2 illustrates a frame relay network topology.

	PVC		X
	768		X
		kbps
PVC
32	Z		PVCY
32	kbps
	kbps
			128	kbps
				kbps

Figure B-1. Three Virtual Circuits in One Physical Circuit

		B
	Frame Relay	Frame Relay/Router
	Network
A	Virtual circuit X	C
	Virtual circuit Y
Frame Relay/Router	Virtual circuit Z	Frame Relay/Router
Frame Relay/Router		Frame Relay/Router
		D
		Frame Relay/Router

Figure B-2. Frame Relay Network using Virtual Circuits

B-4

ATLAS 550 User Manual

61200305L1-1

Image 216

ADTRAN 550 user manual Figure B-1. Three Virtual Circuits in One Physical Circuit

Contents

Atlas Trademarks Service Type REN/SOC FIC Usoc Affidavit Requirements for Connection to Digital Services Page Canadian Equipment Limitations About this Manual Introduction Getting StartedReference Information Working with the Atlas Keyboard Commands Notations and Conventions Menu Items Limited Product Warranty Additional Warranty InformationPage Table of Contents Chapter Using the Front Panel 61200305L1-1 Xiii Chapter Module Terminal Menus Modules Menu T1Network Interface Module Chapter Router Dedicated Maps 10-1 Dial Plan 11-1 61200305L1-1 Xix Table of Contents 12-1 Xmodem CRC Appendix B OSI Model and Frame Relay Technology Overview Table of Contents Xxiv List of Figures List of Figures 61200305L1-1 Xxvii List of Figures Xxviii List of Tables List of Tables Introduction Product Overview Access Router Frame Relay Access Switch Frame Relay Circuit Router Dedicated and Switched Connection Maps in a Single Platform Digital Access Cross-Connect System DacsAdditional Applications WAN Overbooking Atlas 550 Features Switched Connection Maps TestingDedicated Connection Maps Performance Monitoring Installation Contents of Adtran ShipmentsInspecting the Adtran Shipment Grounding Instructions Supplying Power to the Unit Mounting OptionsReviewing the Rear Panel Design Control/Chain In Port Control/Chain In PinoutPIN Name Description Control/Chain Out Port Ethernet ConnectionControl/Chain Out Pinout Ethernet Pinout Alarm Relay Connection External Alarm Relay Monitor ConnectionAlarm Relay Connector Pinout Pin Name Description External Relay Monitor Connector Pinout Network ConnectionNetwork RJ-48C Pinout Frame Relay Specifications Network Interface 15-pin Male D-connector PinoutTest Interface IP Router Specifications Installing Option ModulesOption Slots Installation Using the Terminal Menus Using VT-100 Terminal EmulationOperation Overview Instructions for Defining the IP Address Step Action Using Telnet Starting a Telnet Session Operation Using the Front Panel ACO Switch Craft Port Front Panel LedsCraft Port Pinout Feature Description Controller Status LEDs ACO SwitchAtlas 550 Front Panel Description Network Module LEDs For these LEDs This color light Indicates that Power Atlas 550 LEDsEthernet Remote Module Online Module Test Using the Front Panel Navigating the Terminal Menus Terminal Menus WindowViewing the Menus Menu Path Window PanesWindow Pane Navigation Additional Terminal Menu Window Features Navigating Using the Keyboard Keys Extended Help Moving through the Menus Session Management KeystrokesTo do this Press this key To do this Press this Configuration Keystrokes Getting Help System Control Terminal Menus To do this Go to this menu Password Security Levels Security LevelsSystem Info Rights Startup Mode Current TIME/DATE Installed MemorySystem Location System Contact System Status Menu Event LOG Clear System Event LOG Ethernet Port S Tatus Resource Usage Ration Chain Port Signal Leads ZeroChain Port TX Bytes System Config Backup Timing SourcePrimary Timing Source MAX Telnet Sessions Snmp Access MbpsChain Port Snmp Current ES Thrsh Total PCV Thrsh D4 Total PCV Thrsh ESF Syslog Setup Event Logging Access Passwords Instructions for Adding/Deleting PasswordsDeleting Passwords Licenses Alarm Relay Reset Alarm Relay Threshold System Utility Menu Available update options vary depending on whether you Indicates the slot number Update Status Config TransferTftp Server Configuration file, reboots, then restarts using the new View Self-test Log DSP RAM RTC RAMTDM RAM Dram Reboot System Factory Default System Module Terminal Menus Modules Alarm SLTType Menu Modules Menu T1Network Interface Module StatusREV LOS REDYellow DS0 a Larm Displays the A/B signaling bits for Rx and Tx DS0s DS0 a Larms TX Prms LBO LOC LB Module Terminal Menus Packet Manager Packet Manager Menus Packet Manager Menu Tree Packet Endpnts LMI PerformanceFrame Relay Statistics Tbop Statistics Dlci Config Becn CountFecn Count Operates in NNI mode QOS PVC CIRDlci State Sublinks Example Dlci QOS Usage Characters Character Description Results MN/AV/MX DLY Endpnt CountEndpnts Sort Packet Cncts SublinkProtocol Enable IQ Stats Port EnablesCncts Sort Frame Relay IQ View IQ Statistics INK Poll CRC Error PVC IA Time RX FecnTX Fecn RX Becn RX CR TX CR Packet Manager Router Router IP Menu Tree IP Menus Static Routes ARP Cache Routes Interfaces Subnet Mask FAR-END Address Only advertises routes not learned through this interface Ethernet Proxy ARPPort Name Ping Reset Stats StatisticsTX Stats START/STOP ReasmTimeout Name Description ForwDatagramsInUnknownProtos InDiscards Icmp Icmp Statistics Name Description OutRedirects OutEchosOutEchoReps OutTimestamps UDP Statistics IP Fast CacheIP Fast Cache Statistics UDP Relay Relay TableUDP Port Router Dedicated Maps Dedicated Maps Menu Tree Using Dedicated Maps with Frame Relay Activate MAPCurrent MAP Auto Create / Edit Maps MAP NameConnects From S LT To S LT/S RT/PEP1ST DS0 DSO Rate T1 Trouble Code Service only applies to non-RBS T1s SIG RBSActivate Time Enbl DAY Example 1 Setting Trunk Conditioning Example 2 Creating a Dedicated MapT1-A T1-B PBX Atlas External Router Configuring the Ports for Example Instructions for Configuring the Ports Instructions for Defining the Data Connections Data Connections Instructions for Defining Voice Connections DS0s Completed Dedicated Map for Example 10-12 61200305L1-1 Dial Plan Dial Plan Menu Dial Plan Menu Tree Network Term SLOT/SVCOUT#ACCEPT RC ID 5 = Ifce Config Data 64KData 56K 64K and Data 56K User Term IN#ACCEPTSRC ID Write security 3 Read security $ rejects all long distance calls, but only for this User Global Param Interface Configurations Automatic Routeback Rejection Global Tone Type Dual T1/PRI Module Network TERMINATION/PRI Strip MSD Network Specific Facility Voice Data Called Digits Transferred Prefix Outgoing Caller Dual T1/PRI Module Network TERMINATION/RBS Source ID DS0S Available FGD TX SequenceFGD RX Sequence Wink After ANI Digit Suppression Direct Inward Dialing Trunk Number Dual T1/PRI Module User TERMINATION/PRI Network Specific Facility Called Digts Transferred Outgoing Caller Source ID Signaling Method Dual T1/PRI Module User TERMINATION/RBS If Feature Group D is used, did refers only to Dnis digits Did D Igts Dual NX56/64 Module User Termination Source ID Ports Available Number of PortsNumber to Dial Call Type Quad BRI/U Module Network Termination Spid NumberD64, D56 Quad BRI/U Module User Termination Spid List Creating Dial PLANS-EXAMPLES Understanding Dial Plan Configurations Example 1 Pstn Connection Dial Plan ConfigurationExample 2 Point-to-Point Connection Dial Plan Configuration Connecting Packet Endpoints in Frame Relay PktendptPORT/PEP Port/PEP Menu Call Routing Table for Routing Using Incoming Number Pktvoice ORT/PEP 12. Interface Configuration Network Termination Menus for Network Termination Did DigitsDid Prefix Menus for User Termination Did D Igits Xmodem Firmware Updates Updating Firmware Updating Firmware using Xmodem Instructions for Updating Firmware Using Xmodem Tftp Firmware Updates Updating Firmware using TftpInstructions for Updating Firmware Using Xmodem Step Action Step Action Using a Telnet program, log in to Atlas YPE when updating a LL M Odules of a T YPE in the AtlasFilename of the update file that was recorded earlier Current firmware update or any errors encountered during Tftp Upload Messages Message MeaningComplete Upload Incomplete Upload 12-6 61200305L1-1 Snmp Management Snmp OverviewSnmp Basic Components MIB Configuring a Trap Destination List via the Terminal Menu Snmp TrapsTrap Destination List Disabling Trap Generating Events Standard TrapsStandard Snmp Traps Trap Name Severity Description DS1 Traps Current Alert Snmp Traps DS1 Snmp Current Alert TrapsCurrent Alert Severity Description Total Alert Snmp Traps Total Alert Traps Total Alert Severity DescriptionClearing DS1 Alert Traps Far End Alert Traps Adtran Utilities Syslog Host Daemon SysLog GUI Atlas 550 SysLog Host GUI Monitor Menu Bar File Display LOG FilesHelp Telnet Utility Telnet Menu Tree Session Connect Edit Options Capture Contents VT-100 UtilityIP Status About Edit Port Tftp Server Utility Colors Enable DisableServer Abort Status Field Meter FieldLOG Field Print LOG Saving the Current Configuration to a Tftp Server Instructions for Saving the Current ConfigurationUnsuccessful Transfer Retrieving the Configuration from a Tftp Server Request Appendix a System Event Logging Table A-1. System Event Event Category Console Log String Table A-2. Switchboard Events Table A-3. Nx 56/64 Events Table A-4. T1 Events Table A-4. T1 Events Category Console Log String Table A-5. Ethernet EventsTable A-6. Isdn Events Isdn Cause Codes Table A-7. Isdn Cause Code Events Category Cause Code LOG Entries Table A-8. Cause Code Log Entry Location Designations Appendix A. System Event Logging Appendix B OSI Model and Frame Relay Technology Overview OSI ModelTable B-1. Seven-Layer OSI Model Example 1 OSI Model Related to Process of Mailing a Letter Send Process Receive Process Frame Relay Virtual Circuits Figure B-2. Frame Relay Network using Virtual Circuits Figure B-1. Three Virtual Circuits in One Physical Circuit Data Link Connection Identifier Dlci User-to-Network InterfaceLocal Management Interface LMI Committed Information Rate CIR Table B-2. LMI Group of Four Dlci AssignmentsUse Annex a and Annex D Managing Network Congestion Figure B-4. Network Congestion and Flow Control Tbop Figure C-1. Atlas to Support Packet Data Configuration Appendix C Frame Relay Examples Figure C-3. Menu for Creating Packet Endpoints Example IP Routing Network-External Routers Figure C-9. Menu for Configuring Packet Endpoints 1 Sublinks Figure C-14. Menu for Creating Packet Endpoints Figure C-16. Menu for Connecting Packet Endpoints Step Figure C-18. Public Frame Relay Network Step Figure C-22. Menu for Configuring Dial Plan Step Example 5 Private Frame Relay Network-Packet Voice Figure C-25. Menu for Creating Packet Endpoints Figure C-29. Connecting PBX DS0 to Frame Relay Endpoint Figure C-30. Connecting FR Endpoint to FR Private Network Figure D-1. Atlas 550 Configured for the Router Option Appendix D Router Examples Example IP Routing NETWORK-ATLAS AS the CENTRAL-SITE Router Figure D-3. Creating Packet Endpoint Figure D-4. Creating Sublinks Appendix D. Router Examples Appendix E Troubleshooting Power-up Self Test Fails Cannot pass data from T1 interface to V.35 port Frame relay link is down Appendix E. Troubleshooting Appendix F Acronyms and Abbreviations PBX Glossary Law Becn Dhcp Fecn Hdlc LEC NNI PCM SNA UDP Appendix G. Glossary Appendix G. Glossary Symbols IndexNumerics Index-2 61200305L1-1 Index-3 Index-4 61200305L1-1 Index-5 Index-6 61200305L1-1 Index-7 Index Index-8 Pre-Sales Inquiries and Applications Support Post-Sale SupportRepair and Return