[ILUG] Help needed with VOIP & Digital Phone
watty at eircom.net
Fri Mar 6 17:20:09 GMT 2009
Kevin Brennan wrote:
>> At which point you'd be lucky to get dialup speed. The **total** cell
>> throughput then with 14.4 or 21 or 42MBps peak speed mast will then
>> be 1Mbps to 2Mbps shared among the 120 users.
> And dial up speed with header compression using AMR and sub 100 ms
> latency on air interface with little jitter and packet loss should be
> enough for each call.
Not as simple. The jitter is too high for G729
latency is 120ms unloaded. With 20 users Latency is over 250ms. Peak
latency is nearly 2000ms
LTE will do sub 100ms latency. No 3G system can at all usually. (in Lab
maybe 80ms for one user). 110ms is real world unloaded minimum. 170ms
Fixed wireless is easily sub 30ms to edge router.
>> Mobile Phone companies make all their money from SMS and
>> voice. Data makes them no money. LTE will cost to them at least 100
>> Euro a Gigabyte, inc getting ROI in a sensible time frame.
> Then they should sit on the fence with existing GSM infrastructure and
> count the money.
> perhaps you should advise them because they are doing the opposite
> As I said voice and SMS revenues are dropping, for example Orange
> recently stated that it wants to increase its mobile sales from
> non-voice services to a fifth of its revenue in the next couple of
> years (currently 6%).
The price for 10Gbyte cap would need to be at least €80 to €120.
At the minute they are paying for market share. At some stage they have
to make profit from Data.
The expensive line rental here of course lets them all overcharge for voice.
Lines down for over 82% before privatisation to less than 68% of
households now. eircom have shot their own feet off.
Unfortunately the Phone Telcos more than the pure ISPs listen too much
to the vendors and don't ask the right questions.
At Mobile World Congress in Barcelona the other week someone claimed
Mobile was the cheapest solution to Rural Broadband in Europe. You can
do fixed wireless masts (x10 to x20 times the performance in same
spectrum because users have directional aerials) for 1/4 the price of
You can do fibre to home for Everyone in Ireland for the cost of a real
100% coverage LTE Mobile network.
Finland is doing Fibre as part of it's Universal Broadband for 88M. We
hand 79M to 3 for "Broadband" when they are rolling out a phone network
already. 4/5ths roughly of it already there.
So basically we are paying 79M to 3 for the exact thing that 3 &
Meteor are rolling out and O2 and Vodaphone already have.
You need 600 to 1200 rural masts, not the 160 that 3 is promising to
add 25% of the NBS population (220K ish buildings, 400K people?) for
36:1 contention and VOIP as per NBS.
Nokia's own figures (the I-HSPA vendor) show average loaded throughput
per sector at 1Mbps / 2MBps. Any of the decent Fixed wireless systems
(even some that are over 4 years old) can do average sector throughput
of 10Mbps to 22Mbps depending on system per 5MHz (3G sectors are 5MHz).
The really rubbish Fixed Wireless can do average throughput 5Mbps per
Sector in 5MHz, x5 better than HSDPA.
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