Not totally true. I will have to look up the formula but there is one for computing delay on a line and it does come into play. I have a large voice network to latin america. You are right the each router adds a chunk - about 20 ms of delay if they are not overloaded, but a line down to Argentina adds almost as much and that is if it is fiber all the way. When you start looking at voice budgets you have to take line delay into account.
>From: "sam sneed" >Reply-To: "sam sneed" >To: [EMAIL PROTECTED] >Subject: Re: How fast do bits travel ? [7:41192] >Date: Thu, 11 Apr 2002 13:35:02 -0400 > >The speed the bits travel should be negligible in comparison with the time >it takes the intermediate(routers, switch,...) and end nodes to >receive/process the signal. So if you're curious for computational purposes >it wouldn;t matter. Electricty in a vacuum travels at light speed. I'm not >sure the effect a copper medium would have. It would probably be less due >to >interference and other electromagnetic influeneces. > >sam sneed > > >""Matthew Tayler"" wrote in message >[EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > Ok I have spent ages trying to find an answer to this question, and >probably > > only added to my confusion. You know how it is you spend ages looking at > > something and become snow blind or get tunnel vision or whatever, but I > > cannot see the answer to the following: > > > > How far does a bit travel in say 1 second or put another way how long >does >a > > bit take to travel a certain distance ? > > > > I understand, or think I do that if the line is say 128kbps then I can, >in > > theory at least, expect 128,000 (approx) bits start down that line every > > second. > > > > But how long do they take to reach the other end, assuming a point to >point > > link and both ends being the same speed, obviously. > > > > There has to be a nice simple formula for this somewhere, you know the >sort > > of thing x= line speed, y = distance z = time etc > > > > Any ideas or poitners would be appreciated > > > > Thanks _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=41248&t=41192 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
