Error Correction on SONET. SONET is set for simple error detection. On the slower data rates (OC 3, 12, 48) this is enough. If errors start to occur the data is switched to the protect channel and the problem is determined. (Tech out to site to replace a bad pack or do fibre cleaning). Why fibre cleaning is necessary, There are at least 8 connections between two terminals. Any dirt or grim that makes it into these connections causes slow degeration of the light levels and when the signel gets low enough errors begin to happen. For long fibre runs the data (on off) also begins to merge because the light can take multiple paths from transmiter to receiver (single mode fibre helps reduce this). Getting a consistent clean signel at the OC-192 rate is hard to do (10 Meg/Sec) (hamming code is a vender option to help with the error rate it is not SONET standard). I would like to know what type of signel they sent and what the error rate was.
Actually I beleive this was brought up for promotional reasons. (Free Add's so to speak). Look at the amout of discussion this has produced. I think I remember seeing something like this last year, may of been the same person.
Paper is used becasue: 1: Losing Items on a computer: a: sys-admin deleted it.(up-grade) b: cann't find it because I keep 1 gig of old email. c: Random deletion by user. d: Hard drive got reformated. 2: Losing Items on paper: a: The barn burned down and destroyed all my hard copy. b: It's lost in this pile of hard copy. c: My dog ate it. (Best for school).
We will not know who is to blame till a finger pointing excercise happens. LUCENT doen't want to be blamed MCI doesn't want it to be them, some poor contractor will probably get fired for not following procedure during the upgrade, whether he did or not.
Currently Lucent is providing support. This went through Level 1, 2 and should now be in product support (designer hands) at LUCENT. End users of Optical carrier equipment/switches are not capable of handling problems of this level. This started out as an upgrade that failed.
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Error Correction on SONET. SONET is set for simple error detection. On the slower data rates (OC 3, 12, 48) this is enough. If errors start to occur the data is switched to the protect channel and the problem is determined. (Tech out to site to replace a bad pack or do fibre cleaning). Why fibre cleaning is necessary, There are at least 8 connections between two terminals. Any dirt or grim that makes it into these connections causes slow degeration of the light levels and when the signel gets low enough errors begin to happen. For long fibre runs the data (on off) also begins to merge because the light can take multiple paths from transmiter to receiver (single mode fibre helps reduce this). Getting a consistent clean signel at the OC-192 rate is hard to do (10 Meg/Sec) (hamming code is a vender option to help with the error rate it is not SONET standard). I would like to know what type of signel they sent and what the error rate was.
Actually I beleive this was brought up for promotional reasons. (Free Add's so to speak). Look at the amout of discussion this has produced. I think I remember seeing something like this last year, may of been the same person.
Paper is used becasue:
1: Losing Items on a computer:
a: sys-admin deleted it.(up-grade)
b: cann't find it because I keep 1 gig of old email.
c: Random deletion by user.
d: Hard drive got reformated.
2: Losing Items on paper:
a: The barn burned down and destroyed all my hard copy.
b: It's lost in this pile of hard copy.
c: My dog ate it. (Best for school).
It looks like paper is a winner
We will not know who is to blame till a finger pointing excercise happens. LUCENT doen't want to be blamed MCI doesn't want it to be them, some poor contractor will probably get fired for not following procedure during the upgrade, whether he did or not.
Currently Lucent is providing support. This went through Level 1, 2 and should now be in product support (designer hands) at LUCENT. End users of Optical carrier equipment/switches are not capable of handling problems of this level. This started out as an upgrade that failed.