I agree carriers are askign for Ethernet now.
I had a long talk with Sprint's lead engineer about this two years ago.
Ironically, I was argueing I thought they were crazy to want Etherent, and 
he replied "We want it for the same reason you want it"

> CDMA-based carriers for example have
> stringent clocking requirements for their TDM that doesn't appear
> solvable with TDD radios.

I cant say I agree with that statement.
I'd  argue that TDD generally solves timing issues that CDMA cant deliver.
Unless you are comparing TDD wireless to Fiber, and timing issues over large 
number of hops.

Tom DeReggi
RapidDSL & Wireless, Inc
IntAirNet- Fixed Wireless Broadband


----- Original Message ----- 
From: "Matt Liotta" <mlio...@r337.com>
To: "WISPA General List" <wireless@wispa.org>
Sent: Wednesday, December 23, 2009 9:24 PM
Subject: Re: [WISPA] Wireless backhauls for Cell Carriers


> That doesn't seem inline with any of the RFPs. Generally speaking, the
> carriers that want TDM only want it for voice and generally don't
> require more than 5 T1s for voice. Almost all of the carriers now seek
> Ethernet for for data. Almost always, the request is between 10Mbps
> and 100Mbps per tower.
>
> Not to say that it is easy. CDMA-based carriers for example have
> stringent clocking requirements for their TDM that doesn't appear
> solvable with TDD radios. Further, the carriers that want Ethernet
> want straight layer2 between their tower and MSO. This generally means
> that the aggregate amount of backhaul exceeds radio capability the
> further away from the MSO you get. Unless you have a fiber partner or
> have fiber yourself then forget it.
>
> -Matt
>
> On Dec 23, 2009, at 6:06 PM, 3-dB Networks wrote:
>
>> Don,
>>
>> Unless your backhaul can support TDM natively and can deliver over
>> 500Mbps
>> just to them (which from what I understand the carriers are really
>> believing
>> they will need), I don't think the average carrier would be
>> interested in
>> collocating if that is what you were thinking of.
>>
>> The more immediate concern to WISP's should be carriers like
>> Clearwire/Sprint gobbling up licensed spectrum for their backhauls
>> in my
>> opinion.  It's a very real concern in markets where Clearwire has
>> deployed... and is only going to become more of a concern going
>> forward.
>> 60GHz and 80GHz are going to get a big boost though.
>>
>> Daniel White
>> 3-dB Networks
>> http://www.3dbnetworks.com
>> dan...@3-db.net
>>
>> -----Original Message-----
>> From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org]
>> On
>> Behalf Of Robert West
>> Sent: Wednesday, December 23, 2009 3:57 PM
>> To: 'WISPA General List'
>> Subject: Re: [WISPA] Wireless backhauls for Cell Carriers
>>
>> Some of us have discussed doing that but it takes more than just a
>> few of
>> us.  If enough were on board it would be a win/win for those involved.
>>
>> Bob-
>>
>>
>> -----Original Message-----
>> From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org]
>> On
>> Behalf Of Don Renner
>> Sent: Wednesday, December 23, 2009 5:37 PM
>> To: 'WISPA General List'
>> Subject: [WISPA] Wireless backhauls for Cell Carriers
>>
>> A coordinated effort by WISPA to provide some of the necessary
>> backhauls,
>> seems like a good idea.
>>
>>
>>
>> http://www.rcrwireless.com/apps/pbcs.dll/article?AID=/20091223/INFRASTRUCTUR
>> E/912219995/
>>
>>
>>
>> Don Renner
>>
>> NetsurfUSA, Inc.
>>
>> 8550 W. Main St.
>>
>> French Lick, IN 47432
>>
>> 812-936-4514     Office
>>
>> 812-936-2006     Fax
>>
>> 812-521-1876     Cell
>>
>> dren...@netsurfusa.net <mailto:dren...@helixtec.net>
>>
>>
>>
>>
>>
>> ----------------------------------------------------------------------------
>> ----
>> WISPA Wants You! Join today!
>> http://signup.wispa.org/
>> ----------------------------------------------------------------------------
>> ----
>>
>> WISPA Wireless List: wireless@wispa.org
>>
>> Subscribe/Unsubscribe:
>> http://lists.wispa.org/mailman/listinfo/wireless
>>
>> Archives: http://lists.wispa.org/pipermail/wireless/
>>
>>
>>
>> ----------------------------------------------------------------------------
>> ----
>> WISPA Wants You! Join today!
>> http://signup.wispa.org/
>> ----------------------------------------------------------------------------
>> ----
>>
>> WISPA Wireless List: wireless@wispa.org
>>
>> Subscribe/Unsubscribe:
>> http://lists.wispa.org/mailman/listinfo/wireless
>>
>> Archives: http://lists.wispa.org/pipermail/wireless/
>>
>>
>>
>> --------------------------------------------------------------------------------
>> WISPA Wants You! Join today!
>> http://signup.wispa.org/
>> --------------------------------------------------------------------------------
>>
>> WISPA Wireless List: wireless@wispa.org
>>
>> Subscribe/Unsubscribe:
>> http://lists.wispa.org/mailman/listinfo/wireless
>>
>> Archives: http://lists.wispa.org/pipermail/wireless/
>
>
>
> --------------------------------------------------------------------------------
> WISPA Wants You! Join today!
> http://signup.wispa.org/
> --------------------------------------------------------------------------------
>
> WISPA Wireless List: wireless@wispa.org
>
> Subscribe/Unsubscribe:
> http://lists.wispa.org/mailman/listinfo/wireless
>
> Archives: http://lists.wispa.org/pipermail/wireless/
>
>
> -- 
> Internal Virus Database is out-of-date.
> Checked by AVG.
> Version: 7.5.560 / Virus Database: 270.12.26/2116 - Release Date: 
> 5/15/2009 6:16 AM
>
> 



--------------------------------------------------------------------------------
WISPA Wants You! Join today!
http://signup.wispa.org/
--------------------------------------------------------------------------------
 
WISPA Wireless List: wireless@wispa.org

Subscribe/Unsubscribe:
http://lists.wispa.org/mailman/listinfo/wireless

Archives: http://lists.wispa.org/pipermail/wireless/

Reply via email to