1. Operation & Management of KT ADSL Networks
OSS Lab.
Dongsik Yun

2. 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

3. 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)

4. 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

5. 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

6. Overview of KT ADSL – Subscribers
Introduce ADSL OSS

7. 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

8. 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

9. 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.

10. 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

11. 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

12. 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

13. 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

14. 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