SEA-ME-WE 3

SEA-ME-WE 3 or South-East Asia - Middle East - Western Europe 3 is an optical submarine telecommunications cable linking those regions and is the longest in the world, completed in late 2000. It is led by France Telecom and China Telecom, and is administered by Singtel, a telecommunications operator owned by the Government of Singapore. The Consortium is formed by 92 other investors from the telecom industry. It was commissioned in March 2000.

It is 39,000 kilometres (24,000 mi) in length^[1] and uses Wavelength Division Multiplexing (WDM) technology with Synchronous Digital Hierarchy (SDH) transmission to increase capacity and enhance the quality of the signal, especially over long distances (this cable stretches from North Germany to Australia and Japan).

According to the cable system network administrator's website, the system capacity has been upgraded several times. The cable system itself has two fibre pairs, each carrying (as of May 2007) 48 wavelengths of 10 Gbit/s.^[2]

In December 2009, The SMW3 Upgrade#4 increased WDM channels from 48 to 64 per fibre pair.^{[3] [4]}

On 1 Jan 2015, 5th Capacity Expansion was distributed to all the owners. The SMW3 Upgrade#5 increased submarine segments capacity to 40 Gbit/s per link, along with landing sites equipment capable of 100 Gbit/s for future needs.^[5]

Landing points

The route (in red) and landing points (numbered in black)

It has 39 landing points in:

1. Norden, Germany
2. Oostende, Belgium
3. Goonhilly, England, UK
4. Penmarch, France
5. Sesimbra, Portugal
6. Tetuan, Morocco
7. Mazara del Vallo, Italy
8. Chania, Greece
9. Marmaris, Turkey
10. Yeroskipou, Cyprus
11. Alexandria, Egypt
12. Suez, Egypt
13. Jeddah, Saudi Arabia
14. Djibouti, Djibouti
15. Muscat, Oman
16. Fujairah, United Arab Emirates
17. Karachi, Pakistan
18. Mumbai, India
19. Cochin, India
20. Mount Lavinia, Sri Lanka
21. Pyapon, Myanmar
22. Satun, Thailand
23. Penang, Malaysia
24. Medan, Indonesia
25. Tuas, Singapore
26. Jakarta, Indonesia
27. Perth, Australia
28. Mersing, Malaysia
29. Tungku, Brunei
30. Da Nang, Vietnam
31. Batangas, Philippines
32. Taipa, Macau
33. Deep Water Bay, Hong Kong
34. Shantou, China
35. Fangshan, Taiwan
36. Toucheng, Taiwan
37. Shanghai, China
38. Geoje, South Korea
39. Okinawa, Japan

Service disruptions

In July 2005, a portion of the SEA-ME-WE 3 submarine cable located 35 kilometres (22 mi) south of Karachi that provided Pakistan's major outer communications became defective, disrupting almost all of Pakistan's communications with the rest of the world, and affecting approximately 10 million Internet users.^[6][7][8]

On 26 December 2006 this link severed, causing major disruption to internet services to and from the Far East. The cause of this was suspected to be a magnitude 7.1 earthquake off the coast of Taiwan. It was stated that the link would take 3 weeks to repair.^[9]

On 30 January 2008 an apparent ship's anchor off Egypt's Alexandria coast is thought to have cut the newer SEA-ME-WE 4 cable, which is intended to provide redundancy, causing slow Internet connections and disruption to international calls to the U.S. and Europe from the Middle East and South Asia. Over 70 percent of the network in Egypt was down. Although central to India's largest carrier, Bharat Sanchar Nigam Limited, the deputy-director general of that organisation said "Only 10 to 15 percent of our connectivity with the international gateway faced problems".^[10]

On 19 December 2008, the cable was again severed, simultaneously with SEA-ME-WE 4, the FLAG FEA cable, and the GO-1 cable.^[11][12]

On 12 December 2010, the cable was again severely affected due to a cable break somewhere between the Alexandria and Sesimbra segments. The fault was later located 31 km from the Alexandria cable station.

On 10 January 2013, the cable was again severed, this time 1,126 kilometres from the Tuas cable station in Singapore, between repeaters 345 and 346.^[13] The repair ship ASEAN Explorer was sent to the site. A permit is required from the Indonesian Authorities to effect repairs: on 3 March 2013 it was reported that "The cable ship operator has advised that the required permit to undertake works has not been granted. A tentative repair date of 09 April 2013 has been posted but still position isn't clear when it will get restore."^[14]

On 30 November 2014, the cable again experienced a problem in the Jakarta to Perth sector. The fault is still being investigated. ASEAN Explorer appeared onsite of the Cable Breakage point on the 24th December 2014 which involved over a week of repairs. Cable restored on 1 January 2015^[15]

On 8 January 2015, The cable once again experienced problems on the Perth to Jakarta Section. The fault is being investigated.^[16]

On September 15, 2015 the cable was again cut at segment 3.3 causing significant disruption to services from Australia to Singapore. Service disruptions caused particular impact for Apple customers due to the release of the iPhone 6, iOS9 and OSX just prior to the cable cut. Apples services were reported as being crippled for Telstra customers but the impact was noticeable for all other Australian ISP's.^[17] This disruption is expected to be repaired sometime after Mid October 2015.^[18] This is the third time that the cable has been cut in this segment in just over 2 and a half years.

On 25 September 2015 at 03:07 UTC, The cable once again experienced problems at SMW3 S3.3 (Perth-BU) at about 1143 km from Tuas cable station (between repeater R346 and R345).^[19] ironically this is the same location as where the previous problem occurred, which took 3 months for Indonesian authorities to permit a cable ship in to repair the damage. On 29 September, it was advised that a cable ship had been mobilized to the area,^[20] to isolate and resolve the fault, with a tentative fix date of mid to late October, however due to the complexity of repairing cables, this time frame was only an estimated time frame for a fix.

On 27 September 2015 at 01:49 UTC, Further faults have been identified in the cable in SMW3 S3.1, The fault location is at 360 km from Ancol Cable Station (between repeater R108 & R109).,^[21] cable ship Asean Explorer has already been mobilized to this location.

On 28 October 2015 at 09:25 GMT, it was reported that able ship Asean Explorer was anchored at Batam Batu Ampar anchorage awaiting customs importation, clearance & work permits. The tentative repair commence and completion date will be on 2 Nov 2015 and 7 Nov 2015 respectively, subject to permit approvals by the relevant authorities and weather condition.

Interception

In August 2013 a major German newspaper claimed that an alliance of Western and Asian intelligence agencies has managed to tap into the cable. The Süddeutsche Zeitung, Germany’s largest broadsheet newspaper, wrote that GCHQ has been leading the interception effort, supported by the National Security Agency, which is GCHQ’s American equivalent. The paper cited Edward Snowden as the source of the information.^[22][23] Australian media subsequently revealed that Australia’s Defence Signals Directorate (DSD) also participates in the undersea cable interception operation, sharing massive amounts of intercepted data with its British and American counterparts: The Age said that the Australian interception activity is facilitated with the help of the Security and Intelligence Division of Singapore’s Ministry of Defense.^[24]

Sea-Me-We 2

Sea-Me-We 3 was based on the success of the earlier shorter cable Sea-Me-We 2. At the time of commissioning, 18 October 1994, Se-me-we 2 was the world's longest optical fibre submarine cable system at 18,751 km. The cable has two single mode fibre pairs with a combined capacity of 1.12 Tbit/s, (2*560 Gbit/s), 151 repeaters and 9 branches.^[25]

Countries Linked

• Pakistan
• Singapore
• Indonesia
• Sri Lanka
• India
• Saudi Arabia
• Djibouti
• Egypt
• Tunisia
• Algeria
• Turkey
• Cyprus
• Italy
• France
• Myanmar

See also

• List of international submarine communications cables
• Other Australian international submarine cables (and year of first service):
  • Pipe Pacific Cable (2009)
  • Telstra Endeavour (2008)
  • Australia–Japan Cable (2001)
  • Southern Cross Cable (2000)
  • JASURAUS (1997) – decommissioned in 2012
  • PacRimWest (1995) – withdrawn from service in 2005

Several other cable systems following a substantially similar route to SEA-ME-WEA 3 between Asia and Western Europe:

• Europe-India Gateway (EIG)
• FLAG Europe Asia
• I-ME-WE
• SEA-ME-WE 4

References

whirlpool topic

• Data from the official website