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ADTRAN TA 5000 User Manual

ADTRAN TA 5000
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Total Access 5000 Business Services Deployment Guide
5-2 65K510DEP08-1A
BSM Overview
Figure5‐1displaysanoverviewoftheBSMdeployment.
Figure 5-1. BSM Diagram
Intheupstreamdirection,customerIPdataarrivesattheaccessmoduleencapsulatedwithin
aPoint‐to‐PointProtocol(PPP)group.T1stransportthePPPtraffic,whiletheNetwork
ControlProtocol(NCP)withintheLinkControlProtocol(LCP)initiatedsessionmanages
the
operationofthePPP.TheInterworkingFunctionde‐encapsulatesthecustomerIPfromthe
PPPandre‐encapsulatesthecustomerIPinEthernet.DSCPvaluesfromthePPPIPtraffic map
directlytop‐bitstosetthepriorityoftheEthernetframes,whichthentraveltotheswitch
module’scross‐connectasadesignatedbridge.Theswitchmodulecross‐connectsthebridge
totheappropriateS‐taggedVLANontheGigEnetworkportsdesignatedfortheupstream
edgerouter.
Inthedownstreamdirection,theswitchmoduleswitchesontheouterVLANVIDtothe
appropriatebridgeofanaccess
module’scustomerdataflow.Attheaccessmodule,theInter‐
workingFunctionde‐encapsulatesthecustomerIPtrafficfromeachEthernetflowandre‐
encapsulatesitinPPP,deliveringittooneoffouregressqueuesbasedontheEthernetframe
p‐bitvalues.
MSAP
Customer
Router
Total Access
5000
IP
PPP
S-tag S-tag
PPP
Edge
Router
Access
Module
Switch
Module
DS1
GigE
GigE
IP
IPoE
S-tag

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ADTRAN TA 5000 Specifications

General IconGeneral
BrandADTRAN
ModelTA 5000
CategoryNetwork Router
LanguageEnglish

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