Category - Network Troubleshooting

SEA-ME-WE 4 Network Topology

The SEA-ME-WE 4 system is divided into four segments with seventeen landing points:

Segments:

Landing points:

1. Marseille, France

2. Annaba, Algeria

3. Bizerte, Tunisia

4. Palermo, Italy

5. Alexandria, Egypt

6. Cairo, Egypt (overland)

7. Suez, Egypt (overland/return)

8. Jeddah, Saudi Arabia

9. Fujairah, United Arab Emirates

10. Karachi , Pakistan

11. Mumbai , India

12. Colombo , Sri Lanka

13. Chennai , India

14. Cox’s Bazar , Bangladesh

15. Satun , Thailand

16. Melaka / Malacca , Malaysia

17. Tuas , Singapore

 

Management and administration:

The SEA-ME-WE 4 cable system was proposed and developed by the SEA-ME-WE 4 Consortium. The Consortium continues to maintain and operate the system. It comprises 16 telecommunications companies:

  1. Algérie Télécom, Algeria
  2. Bharti Infotel Limited, India
  3. Bangladesh Submarine Cable Company Limited (BSCCL), Bangladesh
  4. CAT Telecom Public Company Limited, Thailand
  5. Emirates Telecommunication Corporation (ETISALAT), UAE
  6. France Telecom – Long Distance Networks, France
  7. MCI, UK
  8. Pakistan Telecommunication Company Limited, Pakistan
  9. Singapore Telecommunications Limited (SingTel), Singapore
  10. Sri Lanka Telecom Limited (SLT), Sri Lanka
  11. Singapore
  12. Saudi Telecom Company (STC), Saudi Arabia
  13. Telecom Egypt (TE), Egypt
  14. Telecom Italia Sparkle S.p.A., Italy
  15. Telekom Malaysia Berhad (TM), Malaysia
  16. Tunisie Telecom, Tunisia

SEA-ME-WE

 

terminal stations

 

sea-cableundersea cable

 

submarine-junction

 

sumarian-cable

 

submarine-cable-water

 

submarian-structure

 

100 Best Things to do in Singapore

How to Make a Network Cable

  • Unroll the required length of network cable and add a little extra wire, just in case.
  • Carefully remove the outer jacket of the cable.

There are two methods set by the TIA (Telecommunications Industry Association.), 568A and 568B. Which one you use will depend on what is being connected. A straight-through cable is used to connect two different-layer devices (e.g. a hub and a PC). Two like devices normally require a cross-over cable. The difference between the two is that a straight-through cable has both ends wired identically with 568B, while a cross-over cable has one end wired 568A and the other end wired 568B.

 

568-B

Straight-through Cable

568B – Put the wires in the following order, from left to right:

  • white orange
  • orange
  • white green
  • blue
  • white blue
  • green
  • white brown
  • brown

568A – from left to right:

568-A

Cross-over Cable

 

  • white/green
  • green
  • white/orange
  • blue
  • white/blue
  • orange
  • white/brown
  • brown

Why First Ping request timed out

Question: 

I have a strange issue where the first ping always times out and connection to the internet is fine. I connect a PC to one of the FastEther ports and I am able to ping the router without any issues. However, the moment I ping an external website i.e. ping www.google.com the first ping request fails. after that the following request come through quickly.

 

Answer:

A Cisco router has a default timout of 5 seconds, when you send a ping request and you recieve . instead of ! , this doesnt necessarly mean the packet is not transmited at all , it just means there is no reply to those packets and some time it could be due to a delay higher than those 2 second

If you are pinging a website. This means we first have to get a DNS resolution then ARP resolution and once these are in order we should be able to ping. If the first ping fails that means the first 2 steps are taking longer than expected.

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