Overview of the Improved MTN project
Geoff Molloy
Communications and Computing
Branch
Bureau of Meteorology
Australia
Overview of the Improved MTN project
Background
• The idea was partly based on two existing
networks:
1.RMDCN.
2.British Telecom (BT) Frame Relay links
between Melbourne-Singapore-Jakarta
Overview of the Improved MTN project
The RMDCN
• Virtual Private Network based on Frame Relay
PVCs
– Guaranteed bandwidth ( CIR )
– Ability to take advantage of unused network capacity (
EIR )
– PVC costs are in function of the CIR and the location of
the end-points
– No limit to the number of Sites that can be connected
– No limit to the number of PVCs that can be established
• TCP/IP is used as a transport protocol
– Fully managed Cisco routers
• Connection via a PTT access line to the in-country
POP
• Backup service ( ISDN, PSTN, dual access line )
Overview of the Improved MTN project
Phases
• implementation of the Improved MTN
project should be a progression. In its
first stage (Phase I), there would be a
mix of “clouds” and existing point-topoint links.
• Phase I should therefore evolve quickly
towards Phase II in which all the MTN
links would be provided via a small
number of “clouds” or Managed networks
– e.g. frame relay.
Overview of the Improved MTN project
Tokyo
64
X.25
0.2
New Delhi
Bangkok
Washington
Manila
Fax
Guam
19.2 X.25
56 X.25
9.6 X.25
Honolulu
1.2
64
TCP/IP
2.4 X.25
Brunei
Bracknell
Micronesia
AFTN+GTS
9.6 X.25
Kuala Lumpur
AFTN+GTS
9.6 X.25
2.4 X.25
1.2
NO
Pago-Pago
ASMC
Singapore
FR 64 (CIR:8)
TCP/IP
RTH
MTN circuit
Jakarta
FR 64 (CIR:8)
TCP/IP (+
X.25)
NMC
Centre in other region
FR 64 (CIR:4)
TCP/IP (+ X.25)
FR 64
(CIR-16)
TCP/IP
Apia
Honiar
a
Port Moresby
4.8 TCP/IP
RSMC
Darwin
9.6 TCP/IP
Papeete
RSMC
Nadi
Port Vila
4.8 X.25
9.6 X.25
Melbourne
NO Not operational
Internet
28.8*
Fax
FR 512
(CIR:128)
Regional circuit
Interregional circuit
NO
Noume
a
Fax
Internet
256*
Wellington
CIR Committed Information Rate (Frame Relay links)
Additional circuit
Internet
256*
radio broadcast
Peak speed through Internet
Regional Meteorological Telecommunication Network for Region V (South-West Pacific)
point-to-point circuits implementation (transmission speed in Kbit/s)
31.VIII.2000
Overview of the Improved MTN project
F
i
New Delhi
g
u
r
Bracknell
e
Moscow
6
.
2
.
Prague
RA VI RMDCN
2
:
Beijing
Tokyo
T
Sofia
Washington
h
Offenbach
e
Cairo
Toulouse
I
Jeddah
M
Nairobi T
Network B
N
Network A
,
P
Dakar
Algiers
h
a
s
Melbourne
Buenos Aires
e
MTN
PVC
through
Network
I
:
Inter-Regional PVC through Network
E
Existing point to point links
x
a
m
Existing network
Access line to Network Services
p
l
RTH - MTN
e
o
f
Mixed use of Data Communication Network Services and point-to-point circuits
Gateway RTH
p
o
s
Brasilia
Overview of the Improved MTN project
New Delhi
Moscow
Beijing
Bracknell
Network D
Prague
RA VI RMDCN
Jeddah
Tokyo
Sofia
Washington
Offenbach
Cairo
Toulouse
Algiers
Network B
Network A
Network C
Nairobi
Melbourne
Buenos Aires
Brasilia
Dakar
Existing Network Services
New possible Network Services
Network-to Network Interconnection
Access line to Network Services
RTH- MTN
Gateway RTH
Figure 6.2.1: The IMTN, Phase II: Example of possible implementation of the MTN - use of Data Communication Network
Overview of the Improved MTN project
Why a managed Network?
• Potential advantages include:
1. Cost-effectiveness compared to dedicated leased
lines. Also economy of scale likely to result in
significant discounts.
2. Burst capability – ideal for timely receipt of large
volume of data for a short period of the day (eg
model data)
3. Ability to increase link capacity easily and quickly
– no need to order new line.
4. Ability to add additional links quickly and
cheaply.
5. High availability – option to have fully managed
service and ISDN backup
Overview of the Improved MTN project
MOU key to flexibility
• Drafting a Memorandum of
Understanding (MoU) among the
centres
  Responsibilities of each centre;
  Method of procurement of the service;
  Funding of the various stages;
  On-going coordination and management
of the relationship with the supplier;
  Procedure for adding another centre to
the cloud, etc.
FRAME RELAY SCHEMATIC ( INFONET by Telstra)
Dorval, Canada
Washington NWS
USA
Tokyo,
Japan
NESDIS
256K
64K
8K
Bracknell
UK
Pretoria,
South Africa
Brasilia
Brazil
Melbourne
Australia
Buenos Aires
Argentina
Hong Kong
HKT
Frame Relay
NNI
Gateway
Tokyo
FR Port
Japan
Local Line
KDDI
Frame Relay
Washington
FR Port
U.S.A.
NNI
Gateway
INFONET
Melbourne
Frame Relay
NNI
Gateway
CAT
Frame Relay
Bangkok
NNI
Gateway
DACOM
Frame Relay
Seoul
FR Port
Australia
FR Port
U.K.
Bracknell
IMTN
Network B
Overview of the Improved MTN project
Melbourne – Tokyo –
Washington – Bracknell network
• Quotes were sought from leading providers
for this network – Worldcomm, Sprint, BT.
Also a quote was sought from Equant under
the RMDCN contract.
• At this time (September 2002) at appears
that this network will be a service from BT
for 3 years
• Unsymetric PVCs