[Asterisk-Users] Zaptel Line Build Out

[asterisk]

I don't think you will have any problems at all.  I have always used the
lowest setting no matter how long the cable (never had a very long cable
run) and have never run into any problems.

My assumption of the CSU settings are because different CSUs have different
voltage outputs (this is just a guess)

Another educated guess is that the settings just tell asterisk how much to
amplify the signal coming in (similar to RX and TX gain) due to attenuation
loss.

Thanks,
Steve


> 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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> >>>>
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> >>>>
> >>>>
> >>>>-- 
> >>>>No virus found in this incoming message.
> >>>>Checked by AVG Anti-Virus.
> >>>>Version: 7.0.344 / Virus Database: 267.11.13/124 - Release Date:
> >
> > 10/7/2005
> >
> >>>>
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