Operation & Management of KT ADSL Networks OSS Lab. Dongsik Yun dsyun@kt.co.kr

Table of Contents Overview of KT ADSL Networks and Services Major consideration points of ADSL operation & management KT ADSL Management System Architecture Characteristics of KT ADSL Management System Remarks 2019-05-04

Overview of KT ADSL – Network Topology NAS ATM KORNET DSLAM ADSL Modem ADSL Line Radius Server ONU HDT FLC-C/D APT Company A (Head) (Branch) 2019-05-04

Overview of KT ADSL – Services Service Class Adsl-Premium Adsl-Lite My-IP Multi-IP HomeNet/ OfficeNet HDSL/ SDSL ADSL-VPN Characteristics PPP (2Mbps Down Speed) (1Mbps Down EoA (Up to 3 IP Addresses) IPoA (Up to 13 IP Addresses) (Up to 16 Sessions for an Access Line) (Up to 21 or more IP Addresses) IP VPN (L2TP Configuration) In-Service Yes Sooner or later Wireless LAN Access Service (NeSpot) is now available 2019-05-04

Overview of KT ADSL – Key Success Factors Residential Type Highly populated (apartment : house=50%:50%) In Seoul, Goung-Gi and Busan, Apartment is about 65% Most demand are concentrated in Seoul, Goung-Gi, Busan(about 70%) Under high competition (KT, HANARO, ThruNet etc) Local loop distance Social effects On-line stock trading On-line gaming Appropriated OSS supports 2019-05-04

Overview of KT ADSL – Subscribers Introduce ADSL OSS 2019-05-04

Major Consideration Points of ADSL O&M Co-existent with legacy POTS Share cooper-wire with Data and Voice Additional MDF work will be necessary Maybe Service Management has problem One Work Order required for POTS and ADSL POTS service ordering system relationship POTS service management system (Service Assurance System) relationship Various order change cases are exist Large-scale service order transaction 20,000 ~ 35,000 order per day in KT Hard to find trouble points PC, ADSL-modem, local loop, DSLAM, ATM, B-RAS Multi-vendor Environment 7 type of DSLAM, 4 type of B-RAS in KT 2019-05-04

KT ADSL O&M System Architecture Service Configuration Management Service Assurance Management Subscriber Data Management System (SDMS) Access Network Support & Warranty for End Resources (ANSWERS) Telecom-service Integration Management System (TIMS) NAS NMS Kornet NMS ATM-NMS Network Management Internet (KORNET) ATM Access Network Transmission Network/ Dedicated Line Network 2019-05-04

Service Configuration Management System Developed ADSL ordering system (SDMS) Modify legacy POTS configuration management system to handle ADSL service (TIMS) ADSL Service Configuration works are very complex, but ADSL is very cheap and popular service, so automation systems are needed. The complicated ADSL service configuration structure between heterogeneous domains. BSS (order entry & Billing) Already-established wired telephony access network. ATM-based transmission network. Internet facilities domains. Complex order handling feature Change order before complete the previous order processing (more 60% of total order) PSTN number change Install location change (move in/out) Internet ID change Service type change Large-scale service order transaction Development the KT proprietary work-flow engine. 2019-05-04

Software Architecture of SDMS BSS SDMS BSS_IF User interface Workflow rules Process Engine Working part Activity CORBA uniC authenC b-rasC atmC ipC masterC SQL SQL CLI CORBA TIMS Radius Server NAS ATM NMS 2019-05-04

Service Assurance System Modify legacy POTS Service Assurance Management system to handle ADSL service (ANSWERS) One-stop interface to customer Support unified customer interface for POTS and ADSL Immediately testing function Integrated Line Test Functions for copper and broadband access networks Equipped with copper line testers Interfaces with various elements such as ESS(POTS Switch), FLC (Fiber Loop Carrier) and DSLAM Interworking with B-RAS Management System 2019-05-04

DSLAM-NAS link & port state check ADSL Testing KORNET Customer PC ATU-R DSLAM NAS ONU HDT ANSWERS FLC-EMS DSLAM-EMS ATM LB Test PM Port Reset Port related Alarm Analog Test B-RAS-NMS B-RAS state check DSLAM-NAS link & port state check 2019-05-04

Network Management Systems TIMS ANSWERS ATM NMS NAS NMS Kornet NMS DSLAM EMS FLC EMS ATM EMS ATM EMS NAS EMS ATM VP PVC ONU KORNET FLC-C/D ADSL Line B-RAS Radius Server ADSL Modem HDT DSLAM ATM 2019-05-04

Remarks OSS is major success factor for ADSL business in KT Large-scale order processing – Service Configuration Management System Customer trouble handling – Service Assurance Management System Management the multi-vendor/multiple technology networks – Network Management System Various services supports ADSL and other high-speed internet services Ethernet-based service (Ntopia) Wireless-LAN access service (NeSpot) IP-based xDSL services Future value added services Children protection service VoD service 2019-05-04