Dtac Mobile Service Down?

[rheinwiese]

BKK Bangchak

If calling out the display posts "no network coverage".

And cannot receive calls as well.

Anyone else?

[thaicbr]

MAYBE THEY ARE UPDATING THE CELLSITE.. MAYBE A DRUNK DRIVER HAS DRIVEN IN TO THE CELLSITE...

other than that dunno.. mine is working but i'm the other side of bkk from you

[rheinwiese]

MAYBE THEY ARE UPDATING THE CELLSITE.. MAYBE A DRUNK DRIVER HAS DRIVEN IN TO THE CELLSITE...

other than that dunno.. mine is working but i'm the other side of bkk from you

Perhaps you are right. Updates.....sigh

The signal strength indicator switches between standard bars and a 3G thingy.

Going on for an hour now

[skippybangkok]

MAYBE THEY ARE UPDATING THE CELLSITE.. MAYBE A DRUNK DRIVER HAS DRIVEN IN TO THE CELLSITE...

other than that dunno.. mine is working but i'm the other side of bkk from you

Perhaps you are right. Updates.....sigh

The signal strength indicator switches between standard bars and a 3G thingy.

Going on for an hour now

Might fix itself, or could be more sinister. 3G "breathes", meaning coverage increases and decreases depending on amount of users and usage. If you live on a boundary, you can be out of 3G on minute, and back in the next. Thus constant handovers between 2G & 3G. Since they are 2 separate networks, if they don't have good core network connectivity, u will get problems / latency . That's why I dumped the old TOT/AIS SIM, it could take 5 mins to get a signal between the two.

Since DTAC has not enough 3G sites, you stand a larger chance. In True and AIS network , there are tons of 3G cell sites, and as such you won't fall between the crack.

If ur lucky it could just be a bug which might recover tomorrow

Edited January 5, 2012 by skippybangkok

[Pib]

No problems for the the wife's or my DTAC cell phone service here in western Bangkok. Probably a local cell tower thingie.

[Yme]

Went out for me in Yanawa / Nanglinchi about 2pm. Dtac at Tesco on Rama IV said they didn't know what was happening but a lot of people had been there changing their SIM cards. Seems to have come back around 9pm. Buddy I was with for a few hours also had dtac and his phone was working.

Edited January 5, 2012 by Yme

[lomatopo]

Based on posts 5 & 6 Jan in Thai social forums it seems like DTAC did have a service outage which affected a significant number of customers. It is too early to tell if this is similar to the massive outage they suffered on 22 Dec, when ~ 70% of their 21 million customers were without service for ~ 5 hours. That outage was related to an upgrade from a Nokia-Siemens Networks management system to one from Ericsson Networks.

[NHJ]

it happened also in koh samui, no service from 3PM to 9PM

[skippybangkok]

I heard NBTC is going to investigate.... Zzzzzz

[lomatopo]

http://www.nationmultimedia.com/technology/dtac-compensates-customers-in-Southern-provinces-a-30173313.html

Dr.Darmp Sukontasap, Chief Corporate Affairs Officer, Total Access Communication PLC (dtac), announced that the company would waive service fee for 48 hours, for over 1.8 million dtac customers affected by a three hour service interruption from dtac on the evening of 5 January 2012. Over 900,000 affected dtac customers were from the seven southern provinces of Chumporn, Surat Thani, Trung, Krabi, Nakorn Sri Thammarat, Phuket and Phung Nga. There rest were spread out in various parts of the country.

Service interruption started when, on 5 January 2012 at around 3.30 pm, the company found that its Mobile Switching Center (MSC) in Surat Thani province was under-performing and the call success rate of dtac customers in such areas had dropped to around 50-60%, resulting in a congestion in dtac's network system and causing over 1.8 million dtac customers to have difficulty in dialing out or receiving calls.

http://www.nationmultimedia.com/business/NBTC-to-inspect-sites-as-network-problem-recurs-30173292.html

[skippybangkok]

http://www.nationmultimedia.com/technology/dtac-compensates-customers-in-Southern-provinces-a-30173313.html

Dr.Darmp Sukontasap, Chief Corporate Affairs Officer, Total Access Communication PLC (dtac), announced that the company would waive service fee for 48 hours, for over 1.8 million dtac customers affected by a three hour service interruption from dtac on the evening of 5 January 2012. Over 900,000 affected dtac customers were from the seven southern provinces of Chumporn, Surat Thani, Trung, Krabi, Nakorn Sri Thammarat, Phuket and Phung Nga. There rest were spread out in various parts of the country.

Service interruption started when, on 5 January 2012 at around 3.30 pm, the company found that its Mobile Switching Center (MSC) in Surat Thani province was under-performing and the call success rate of dtac customers in such areas had dropped to around 50-60%, resulting in a congestion in dtac's network system and causing over 1.8 million dtac customers to have difficulty in dialing out or receiving calls.

http://www.nationmultimedia.com/business/NBTC-to-inspect-sites-as-network-problem-recurs-30173292.html

I don't know what the deal was, but heard they changed their price plans, which in turn increased traffic causing network issues / congestion. Anyone know more ?

[lomatopo]

The linked article goes on to say...

Service interruption started when, on 5 January 2012 at around 3.30 pm, the company found that its Mobile Switching Center (MSC) in Surat Thani province was under-performing and the call success rate of dtac customers in such areas had dropped to around 50-60%, resulting in a congestion in dtac's network system and causing over 1.8 million dtac customers to have difficulty in dialing out or receiving calls.

Which seems relatively straight-forward. Not sure what changes to price plans would have to do with a localized occurrence? I did not suffer any loss of service during wither (22 Dec/5 Jan) but did receive some extra credits.

DTAC is trying to upgrade their systems, both for expanded 3G and a new subscriber management system, the latter of which was blamed for the massive outage on 22 Dec.

[skippybangkok]

Which seems relatively straight-forward. Not sure what changes to price plans would have to do with a localized occurrence? I did not suffer any loss of service during wither (22 Dec/5 Jan) but did receive some extra credits.

DTAC is trying to upgrade their systems, both for expanded 3G and a new subscriber management system, the latter of which was blamed for the massive outage on 22 Dec.

Point taken.... Could be as a result of fiddling with the core network. But it is known that they had issues with an over load of traffic as a result of a price plan...... And that does cause CSSR issues

[lomatopo]

DTAC clarifies network collapse

DTAC CEO Jon Eddy Abdullah on Monday clarified causes of the company's three major network outage in less than three weeks, marking its longest network failure in recent years.

Mr Abdullah acknowledged the service interruption occured on Dec 21, last Monday and Thursday.

He said the first two incidents were the result of disruption in the company's Home Location Register (HLR), which contain customer database, when it was migrating the database from Nokia Siemens to Ericsson's system and upgrading its existing 2G network to a 3G system.

The latest network collapse, which lasted two hours, occured at 12.15pm after trucks struck DTAC's signal towers in Phetchaburi and Prachuap Khiri Khan provinces, causing fires at the structures and damaged the company's fiber optic cable network.

DTAC has 23 million subscribers. The company's network collapse affected 900,000 users in southern provinces plus another 900,000 in Bangkok.

Edited January 9, 2012 by lomatopo

[skippybangkok]

DTAC clarifies network collapse

DTAC CEO Jon Eddy Abdullah on Monday clarified causes of the company's three major network outage in less than three weeks, marking its longest network failure in recent years.

Mr Abdullah acknowledged the service interruption occured on Dec 21, last Monday and Thursday.

He said the first two incidents were the result of disruption in the company's Home Location Register (HLR), which contain customer database, when it was migrating the database from Nokia Siemens to Ericsson's system and upgrading its existing 2G network to a 3G system.

The latest network collapse, which lasted two hours, occured at 12.15pm after trucks struck DTAC's signal towers in Phetchaburi and Prachuap Khiri Khan provinces, causing fires at the structures and damaged the company's fiber optic cable network.

DTAC has 23 million subscribers. The company's network collapse affected 900,000 users in southern provinces plus another 900,000 in Bangkok.

Trucks with an "s" ? Sounds like a co-ordinated terrorist attack. ?

No redundant core transmission ? - sounds weird to me. all telco networks have redundant Tx for such large customer quantities.

sounds to me like poor design / saving money (no redundancy )

[lomatopo]

Additional details in this article...

http://www.nationmultimedia.com/business/Push-to-boost-number-portability-30173442.html

On January 5, DTAC experienced another network fault that affected many customers in the southern provinces. The company found that its mobile switching centre in Surat Thani was underperforming and the call success rate of DTAC customers in such areas had dropped to about 50-60 per cent, resulting in congestion in its network system and causing over 1.8 million customers to have difficulty in dialing out or receiving calls.Over 900,000 affected DTAC customers were from the seven provinces of Chumphon, Surat Thani, Trang, Krabi, Nakhon Si Thammarat, Phuket and Phang Nga. The rest were spread over varous parts of the country.

On January 8, a brush fire in Phetchaburi and a car accident in Pranburi destroyed two critical fibre routes, severing service to the South. DTAC's emergency repair teams responded quickly and had fibres spliced and service restored in 2.5 hours.

[skippybangkok]

........and the call success rate of DTAC customers in such areas had dropped to about 50-60 per cent, resulting in congestion in its network system and causing over 1.8 million customers to have difficulty in dialing out or receiving calls.\.

Looks sus to me.......

1) Call Sucess Rate Depends also on the B side, and the typical values for Call Sucess rate are about 50-60 %

2) Why does "call sucess rate" increase congestion ? Only thing i can think of is actually multiple repeat tries if cant get through........

We know there were issues, but not sure the above explanation from DTAC is valid.

[lomatopo]

Cross-network CSR here is ~ 85%, with Truemove and Hutch being the worst. Intra-network CSRs are usually in the high 90% range. A few years ago when there were issues here with the gateways cross-net CSR was below 50%.

DTACs explanation makes sense to me.

[skippybangkok]

Cheers.... I am out of date on core......

My old benchmark for consolidate was about 60%