[Asterisk-Users] Zaptel Line Build Out

[Rod Bacon]

Yeah... sorta.

So the CSU settings may be used when the E1 is pulled down to my premises, and I 
have a short cable connecting directly to the CSU device. I don't know why I'd 
need to change the LBO settings in that case, but I guess that doesn't really 
matter to me at the moment.

In my case, I am approximately 40-50 metres (130-165 feet) from the switch 
(according to the telco's engineers), so an LBO of "1" in my span definition 
would theoretially be correct.




asterisk wrote:
> http://www.adc.com/Library/Techpub/80348_1.pdf?refer=Library&C=Copper_Connectivity&L=DS1_E1_Twisted_Pair_Products
> 
> http://www.pcmag.com/encyclopedia_term/0,2542,t=DSUCSU&i=42059,00.asp
> 
> any help?
> 
> 
> 
> 
> 
> 
> 
>>Maybe I need to be a little more specific.
>>
>>I know what signal attenuation is. What I don't know, is how LBO (and
>>specifically the implementation of it as used in the zaptel
> 
> hardware/software)
> 
>>helps the situation.
>>
>>My servers are co-located with my carrier, and my PRI circuits are run
> 
> through
> 
>>several patch panels, jumpers, etc. to another room, where they terminate
> 
> on a
> 
>>DMS-100. I have asked the carrier for an estimated cable length, so i can
>>correctly set the LBO.
>>
>>In the zaptel config, what is meant by DSX-1? What is CSU?
>>
>>Why would I use a -7.5db, -15db or -22.5db LBO?
>>
>>
>>
>>
>>asterisk wrote:
>>
> http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci211613,00.html
> 
>>>
>>>----- Original Message ----- 
>>>From: "Rod Bacon" <rod.bacon at empoweredcomms.com.au>
>>>To: <asterisk-users at lists.digium.com>
>>>Sent: Sunday, October 09, 2005 6:42 PM
>>>Subject: [Asterisk-Users] Zaptel Line Build Out
>>>
>>>
>>>
>>>
>>>>Can someone who is knowledgable in the traditional telco space please
> 
> give
> 
>>>me a
>>>
>>>
>>>>layman's explanation (or point me to an appropriate url) of LBO as per
> 
> the
> 
>>>>zaptel configuration file?
>>>>
>>>># The line build-out (or LBO) is an integer, from the following table:
>>>># 0: 0 db (CSU) / 0-133 feet (DSX-1)
>>>># 1: 133-266 feet (DSX-1)
>>>># 2: 266-399 feet (DSX-1)
>>>># 3: 399-533 feet (DSX-1)
>>>># 4: 533-655 feet (DSX-1)
>>>># 5: -7.5db (CSU)
>>>># 6: -15db (CSU)
>>>># 7: -22.5db (CSU)
>>>>
>>>>
>>>>-- 
>>>>==========================================
>>>>Rod Bacon
>>>>Empowered Communications
>>>>Ground Floor, 102 York St. South Melbourne
>>>>Victoria, Australia. 3205
>>>>Phone: +613 99401600    Fax: +613 99401650
>>>>FWD: 512237                   ICQ: 5662270
>>>>==========================================
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> 
> 10/7/2005
> 
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>>>
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