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" <[EMAIL PROTECTED]> > >>>To: <[email protected]> > >>>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 > >>>>========================================== > >>>>_______________________________________________ > >>>>--Bandwidth and Colocation sponsored by Easynews.com -- > >>>> > >>>>Asterisk-Users mailing list > >>>>[email protected] > >>>>http://lists.digium.com/mailman/listinfo/asterisk-users > >>>>To UNSUBSCRIBE or update options visit: > >>>> http://lists.digium.com/mailman/listinfo/asterisk-users > >>>> > >>>> > >>>> > >>>>-- > >>>>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 > > > >>>> > >>> > >>>_______________________________________________ > >>>--Bandwidth and Colocation sponsored by Easynews.com -- > >>> > >>>Asterisk-Users mailing list > >>>[email protected] > >>>http://lists.digium.com/mailman/listinfo/asterisk-users > >>>To UNSUBSCRIBE or update options visit: > >>> http://lists.digium.com/mailman/listinfo/asterisk-users > >>> > >>> > >> > >>_______________________________________________ > >>--Bandwidth and Colocation sponsored by Easynews.com -- > >> > >>Asterisk-Users mailing list > >>[email protected] > >>http://lists.digium.com/mailman/listinfo/asterisk-users > >>To UNSUBSCRIBE or update options visit: > >> http://lists.digium.com/mailman/listinfo/asterisk-users > >> > >> > >> > >>-- > >>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 > >> > > > > > > _______________________________________________ > > --Bandwidth and Colocation sponsored by Easynews.com -- > > > > Asterisk-Users mailing list > > [email protected] > > http://lists.digium.com/mailman/listinfo/asterisk-users > > To UNSUBSCRIBE or update options visit: > > http://lists.digium.com/mailman/listinfo/asterisk-users > > > > > _______________________________________________ > --Bandwidth and Colocation sponsored by Easynews.com -- > > Asterisk-Users mailing list > [email protected] > http://lists.digium.com/mailman/listinfo/asterisk-users > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users > > > > -- > 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 > > _______________________________________________ --Bandwidth and Colocation sponsored by Easynews.com -- Asterisk-Users mailing list [email protected] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
