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Cellular Phone Forum / Country Specific / Australian Group / July 2004

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Telstra mobile faults surge (Australian IT article)

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Jason - 29 Jul 2004 01:08 GMT
Hi All,

Report from Australian IT below.  The obvious joke aside (further &
further behind), it's a bit sensationalist.  Your only talking about 7
minutes per base station per month above the target.  Then again,
that's probably a weighted average across all base stations anyway.

The other telcos (3 & Optus especially) must be loving all this
negative media attention on telstra!

Jason

http://australianit.news.com.au/articles/0,7204,10274990%5E15306%5E%5Enbv%5E,00.html

Telstra mobile faults surge
James Riley
JULY 29, 2004  

SERVICE faults on Telstra's mobile networks are as much as one-third
higher than its internal targets, according to a leaked report.

Poorly documented repair procedures for base stations meant that
faults on Telstra's two mobile networks were taking longer to repair,
the confidential report found. High fault levels at base stations mean
more mobile phone blackouts for consumers.
The leaked report follows a similar document in March which showed
that faults on the Telstra fixed-line network had soared to a six-year
high.

Labor's communications spokesman Lindsay Tanner said the leaked report
demonstrated that the "same pattern of deteriorating service levels
that we are seeing in the fixed-line network is now starting to appear
in the mobile network".

The Supportability Review of Telstra's network of base stations across
Australia found that service outages on the company's primary mobile
network base stations were 25percent higher than targeted levels -
20.8 minutes per transmitter per month compared with an internal
target of 16 minutes.

Outages on its CDMA network, which is widely used in regional areas,
were about 33 per cent higher than the company had targeted - 27.8
minutes versus a target of 20.

The report, dated April 2004, found that on both networks the total
number of outages was higher than the previous month and had shown no
improvement over the previous three months.

It found that staff responsible for carrying out repairs -- especially
in regional areas -- urgently needed training. Telstra often did not
know about problems with mobile phone towers until a customer
complained, because the company no longer carried out proactive
maintenance testing.

"This leaked report provides further evidence that Telstra has taken
its eye off the ball in regards to its core telecommunications
functions," Mr Tanner said.

"Over the past few years, you've had a massive reduction in capital
expenditure (at Telstra) and a dramatic reduction in staff numbers, so
it would be surprising if there wasn't this kind of impact on service
levels."

Telstra spokesman Rod Bruem said Mr Tanner had taken the internal
service report out of context, and that there had been no cutbacks to
the maintenance of mobile phone towers. He said service levels within
the mobile networks were at all-time highs.
John - 29 Jul 2004 03:30 GMT
> Hi All,
>
> Report from Australian IT below.  The obvious joke aside (further &
> further behind), it's a bit sensationalist.  Your only talking about 7
> minutes per base station per month above the target.  Then again,
> that's probably a weighted average across all base stations anyway.
...
> Poorly documented repair procedures for base stations meant that
> faults on Telstra's two mobile networks were taking longer to repair,
> the confidential report found. High fault levels at base stations mean
> more mobile phone blackouts for consumers.

Which is bad, but I think a single base station failure is less
critical than a fixed-line failure because most phones can just
switch to a neigbouring cell (unless of course it is in
a area with only one base station).

So you might get a blackout or some call congestion,
but most likely nobody will even notice.

.
Michael - 29 Jul 2004 12:00 GMT
> > Hi All,
> >
[quoted text clipped - 15 lines]
> So you might get a blackout or some call congestion,
> but most likely nobody will even notice.

Depends if the site is a capacity site or not

> .
Jeremy Quirke - 29 Jul 2004 13:42 GMT
> > Hi All,
> >
[quoted text clipped - 15 lines]
> So you might get a blackout or some call congestion,
> but most likely nobody will even notice.

There were issues with particular Nokia base stations on Optus a few years
back, in which the transceivers would rapidly switch their downlink power.
The result was phones using the BTS had very poor radio link quality which
kept dropping out. However, as far as the network was concerned, nothing was
wrong, and thus the phones continued to camp on them in idle mode.
Effectively the BTS was acting as an "inverse cell" (i.e. cancelling the
coverage from the neighbours).
Michael - 29 Jul 2004 14:31 GMT
> > > Hi All,
> > >
[quoted text clipped - 23 lines]
> Effectively the BTS was acting as an "inverse cell" (i.e. cancelling the
> coverage from the neighbours).

customers notice something is wrong
customers lodge faults
fault teams collate stats on postcodes / areas / bts numbers
people realise the BTS(es) have issues
BTSes are fixed
Jeremy Quirke - 29 Jul 2004 15:48 GMT
> > > > Hi All,
> > > >
[quoted text clipped - 30 lines]
> people realise the BTS(es) have issues
> BTSes are fixed

Completely irrelevant to my post.
J Doe - 29 Jul 2004 17:15 GMT
> > > > > Hi All,
> > > > >
[quoted text clipped - 38 lines]
>
> Completely irrelevant to my post.

But that's normally the case with Michael's Pro-Telstra ramblings.
Albinus - 30 Jul 2004 05:03 GMT
> There were issues with particular Nokia base stations on Optus a few years
> back, in which the transceivers would rapidly switch their downlink power.
[quoted text clipped - 3 lines]
> Effectively the BTS was acting as an "inverse cell" (i.e. cancelling the
> coverage from the neighbours).

I was one doing contract work for a firm with an Optus BTS across the
street, with the antenna housing pointing straight through the window at me
(with an Rx signal strength of around -30dBm). The whole area was blacked
out (car ran into power pole), the the signal strength suddenly dropped to
about -50dBm. Any connection with what you're saying? The site was using
Nokia BTS equipment IIRC.

The only problem I have encountered with Optus was with their Ashgrove cell,
any call made or handed over to the BTS in question dropped out with the
three rising tones. I just locked my MS onto the Red Hill cell with a
BTS_TEST and let Optus faults know - 30 minutes later it was fixed.

Albinus.
Jeremy Quirke - 30 Jul 2004 07:29 GMT
> > There were issues with particular Nokia base stations on Optus a few years
> > back, in which the transceivers would rapidly switch their downlink power.
[quoted text clipped - 18 lines]
>
> Albinus.

What it looks like in the first example is the BTS reducing the downlink
BCCH power to conserve power.

This is different to the problem I described in which the BTS appeared to be
working fine in idle mode (i.e. BCCH broadcast info was fine), but in
dedicated mode it seems the power control went horribly wrong resulting in
poor/dropped calls. This was a well known fault and easily fixed by (remote)
firmware upgrade.
Kwyjibo. - 29 Jul 2004 11:10 GMT
jjcoolaus@yahoo.com.au (Jason) said

> service outages on the company's primary mobile
> network base stations were 25percent higher than targeted levels -
> 20.8 minutes per transmitter per month compared with an internal
> target of 16 minutes.

I love the way these useless journalists twist the figures say what *they*
want.

A 30 day month has 43200 minutes
The target is 16 minutes per month, which is 0.03% downtime or 99.97% uptime
They are achieving just under 0.05% downtime, or 99.5% uptime.

Down 0.02% on their targets. Big f.cking deal.

Signature

Kwyj.

(Remove your panties to reply by email)

Michael - 29 Jul 2004 12:00 GMT
> The report, dated April 2004, found that on both networks the total
> number of outages was higher than the previous month and had shown no
[quoted text clipped - 5 lines]
> complained, because the company no longer carried out proactive
> maintenance testing.

Thats irrelevant. Alarms sound at the GOC for the huge majority of faults
that are relevant.
J Doe - 29 Jul 2004 14:36 GMT
> > The report, dated April 2004, found that on both networks the total
> > number of outages was higher than the previous month and had shown no
[quoted text clipped - 8 lines]
> Thats irrelevant. Alarms sound at the GOC for the huge majority of faults
> that are relevant.

Exactly right Michal, same as with Optus and I am assuming other carriers

"Telstra often did not know about problems with mobile phone towers until a
customer complained, because the company no longer carried out proactive
maintenance testing.". That's a load of crap really
 
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