From: curtis staller (curtisstaller@xxxxxxxxxxx)
Date: Sat May 19 2001 - 00:35:31 GMT-3
I know these issues well since i have a ton of t1s, ds3s and oc3s at
work. This depends slightly on the WIC that u have and the commands in
an ls1010 are slightly different. Clock internal means provide (send a
singal) to the other side. Line is just that, recieve it from the line.
On an ls1010 the options are, free-running (provide
clock) network-derived (recieve from line). I have seen circuits up for
almost a year with incorrect settings and then all of a sudden the
router/switches will get off more than 200 cycles (i think that is the
threshold) and then they go down or bounce. Anyways, u want one end to
be internal and the other to be line. I have heard some Engineers claim
to have ordered circuits from telco that had a clock from their stratums
but i have yet to see it work well. Also note the higher end router
should allways be providing the clock.
>From: Jason Gardiner >Reply-To: Jason Gardiner >To: Jeongwoo Park >CC: ,
"Jay@West. Net" >Subject: Re: clocking source at router >Date: Fri, 18
May 2001 19:49:04 -0400 (EDT) > >Hello, > >The CSU/DSU is actually 2
separate functions that takes the single serial >signal coming from the
router and channelizing it into 24 64Kbps channels. >Each side requires a
clock. Typically, the router provides clock for the >DSU, telco for the
CSU (I think I've got that right), as each uses >different methods of
ensuring data synchronization. But the router _can_ >provide clocking
across the whole circuit if the CSU/DSU allows it to. > >Thanks, > >Jason
Gardiner >Engineering Services >Sprint E|Solutions > >"The only thing to
prevent what's past is to put a stop to it before it happens." > - Sir
Boyle Roche > >On Fri, 18 May 2001, Jeongwoo Park wrote: > > > hi all > >
Shouldn't router's source clocking be configured depending on csu/dsu's >
> source clocking? > > For example, csu/dsu's source clocking was
configured as internal. Then what > > type of clocking source should the
router that is directly connected with > > this csu/dsu have? > > Should
this router have line or internal or something else? > > Or am I totally
missing something? > > > > thanks in adv > > > > oh, one more thing that
pops out of my head.. > > I have seen a router 1740 that has csu/dsu
module within the router. Then > > what is the deal in this case? > > > >
jp > > **Please read:http://www.groupstudy.com/list/posting.html
>**Please read:http://www.groupstudy.com/list/posting.html
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