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646 posts

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Topic # 110507 10-Oct-2012 12:57
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We have a client wanting to outfit a vehicle for remote use around Auckland using a 3G router for Telecoms network. 

The vehicle cannot have a high mounted omni, it must be vandal proof and also must be a quad band antenna to work on Telecoms 2100mhz. The antenna also must be pointed down from an L bracket therefore creating some shadowing....

The reason for 2100mhz is the use of this freq for high use sites etc and the consultant wants it like this.

The challenge we have is we can provide a shark fin or small stubbie 850 antenna perfect for the vehicle and obviously XT but because we have been told that it must do 2100mhz the options available to us are limited. 

Yes we can buy quad band antennas that could be used however my issue is purely that the antenna is not going to be mounted in a normal sense (pointing down in vertical arrangement) the gain at 2100mhz is low and as the antenna is receiving 850mhz it may pick up a stronger signal on 850mhz on another cell and use that instead. The shadowing also will limit performance.

Have done plenty of bus and mobile setup's like this but usually 2100mhz is a Vodafone issue for us but in Auckland it may be used a lot more on Telecom.

I know what I would normally provide, my suppliers agree but do need some advice from potentially those with understanding on Telecoms 2100mhz network and how much of a benefit it will be over 850mhz especially with buildings making great big signal walls..

Thanks in advance 








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  Reply # 699051 10-Oct-2012 13:00
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I would stick to a pure 850Mhz antenna and configure the card to not support 2100.  850Mhz is nationwide coverage and gets far better building penetration than 2100 does.

2100 is for Infill only and if you configure your data card to not support 2100 then the network would never push you onto the higher frequency range.

I know the Sierra datacards can be locked to only work at 850Mhz and not 2100.

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  Reply # 699052 10-Oct-2012 13:01
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bbman: The reason for 2100mhz is the use of this freq for high use sites etc and the consultant wants it like this.


This consultant is leading you the wrong way. You should use a 850 MHz device/antenna combination. You should not rely on 2100 MHz when using Telecom.





 
 
 
 


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  Reply # 699054 10-Oct-2012 13:03
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freitasm:
bbman: The reason for 2100mhz is the use of this freq for high use sites etc and the consultant wants it like this.


This consultant is leading you the wrong way. You should use a 850 MHz device/antenna combination. You should not rely on 2100 MHz when using Telecom.


+1 on that MF, 2100 is in-fill only and should never be considered the primary network.  For fixed antennas it's just a nightmare as the antennas normally only do 850 or 2100 but not both.

So I would stick to an antenna that only supported 850Mhz and ensure the datacard you use supports being locked to only 850Mhz.



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  Reply # 699056 10-Oct-2012 13:04
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Thanks, I am of course aware of all this but really did want some feed back as I am sure you can understand. Unfortunately it is one of those situations where we get a bunch of science chucked at us but practical and years of experience tells us different.

I was thinking of Telstra in Aus, they are getting rid of 2100mhz and rolling out LTE but 850 or NextG is everywhere.







www.ultimatebroadband.co.nz 
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UFB fibre, Rural fibre on EA networks, RBI wireless, Ruralnet & Ultra wireless, wireless networks


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  Reply # 699058 10-Oct-2012 13:09
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bbman: Thanks, I am of course aware of all this but really did want some feed back as I am sure you can understand. Unfortunately it is one of those situations where we get a bunch of science chucked atus but practical and years of experience tells us different.

I was thinking of Telstra in Aus, they are getting rid of 2100mhz and rolling out LTE but 850 or NextG is everywhere.


Feel free to email me pl at telecom dot co dot nz and I can get either an official or semi-official response back or if you have a customer account manager push it that way.

I would hope common sense should prevail... But that's not always the case :)



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  Reply # 699067 10-Oct-2012 13:24
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Thanks for that, really appreciate it. I am writing my report based on this so hoping that we can just get on with providing the right product... consultants...





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  Reply # 699068 10-Oct-2012 13:25
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bbman: Thanks, I am of course aware of all this but really did want some feed back as I am sure you can understand. Unfortunately it is one of those situations where we get a bunch of science chucked at us but practical and years of experience tells us different.

I was thinking of Telstra in Aus, they are getting rid of 2100mhz and rolling out LTE but 850 or NextG is everywhere.




Not quite correct.

Telstra's 2100 3G (3GIS) network and their 850 Next G network were two entirely different networks. 3GIS was a shared Telstra/3 network that has now been closed down. Some of the 3GIS spectrum remains with Telstra and is now being redeployed as 2100MHz Next G coverage.



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  Reply # 699070 10-Oct-2012 13:26
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Thanks for the clarification, so they are still using it although working on there 1800 LTE and 850 Next G.





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  Reply # 699071 10-Oct-2012 13:32
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bbman: Thanks for the clarification, so they are still using it although working on there 1800 LTE and 850 Next G.


3GIS was only shut down at the end of August. The migration of 2100 sites to Next G is work in progress at present.

While it's mainly for capacity it's also so they can also deploy dual band dual carrier HSPA+



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  Reply # 699073 10-Oct-2012 13:37
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Makes sense, Vodafone maybe doing the same here possibly?





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  Reply # 699077 10-Oct-2012 13:42
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bbman: Makes sense, Vodafone maybe doing the same here possibly?


The 3GIS network infrastructure and sites were basically split 50/50 between Telstra and Vodafone. Vodafone are using their sites to replace the kit with their new 850MHz network.

Here in NZ Vodafone are deploying 900 in the cities soon.



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  Reply # 699104 10-Oct-2012 14:18
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Yep, will be an excellent move for Vodafone urban wise, in relation to our RBI clients it would be even better if they put 900 on all sites, 2100 just simply doesn't cut it in rural areas especially with a few trees.





www.ultimatebroadband.co.nz 
Delivering better broadband services

UFB fibre, Rural fibre on EA networks, RBI wireless, Ruralnet & Ultra wireless, wireless networks


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