Re: ANSI T1.231 ?

Ken Chapman <KChapman@Argon.com> Thu, 11 June 1998 20:16 UTC

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Date: Thu, 11 Jun 1998 15:58:48 -0400
To: "C. M. Heard/VVNET, Inc." <heard@vvnet.com>, atommib@bellcore.com, trunk-mib@external.cisco.com
From: Ken Chapman <KChapman@Argon.com>
Subject: Re: ANSI T1.231 ?
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Ahhh!  I see the light.  
So...  "digital signal level" means signal *rate* AND *layer* AND
*direction*.  
Your right, that is a lot of defaults!  :^)
Thanks for being so patient.
	Ken

At 11:08 AM 6/11/98 -0700, C. M. Heard/VVNET, Inc. wrote:
>On Thu, 11 Jun 1998, Ken Chapman wrote:
>>>> So, let me ask it another way.  If I have a box with a DS1 port, a DS2
>>>> port, an OC3 port and two (2) OC12 ports, I'll have five (5) separate
>>>> threshold registers for the current SES errors (one for each port).
>>>> How many default threshold registers do I need for SES 15 minute interval
>>>> errors to satisfy ANS1 T1.231-1997 claues 9.1.5.2, paragragh 2?
>[...]
>>>[S]uppose that the SONET ports on your box are an OC3c and two OC12c's.
>>>
>>>[Then] if you support far end parameters, you will need to have
>>>_at least_ 14 default thresholds for SES objects (2 for DS1, 2 for DS2,
>>>5 for OC3, and 5 for OC12).  If you support only near-end parameters
>>>then you need _at least_ 8 default thresholds (1 for DS1, 1 for DS2,
>>>3 for OC3, and 5 for OC12).  More will be needed if your SONET ports
>>>support non-concatenated payloads and/or VTs.
>>>
>>
>>I'm sorry, but this sounds like you are talking about the THRESHOLD
>>registers and not the DEFAULT threshold registers.  If you REALLY mean
>>DEFAULT (per T1.231 9.1.5.2), then what you are saying is that there
>>is BOTH a THRESHOLD register AND a DEFAULT threshold for each of the things
>>you mentioned above.  I don't believe this is what was intended by
>>T1.231 9.1.5.2.
>
>T1.231 9.1.5.2 requires that the thresholds shall be settable on a
>_per-port_ basis by requesting a specific value or by requesting "default".
>
>Threshold values exist for each performance parameter, accumulation period,
>digital signal level, _and port_.
>
>Corresponding default values exist for each parameter, accumulation period,
>and digital signal level.  They apply NE-wide and are not replicated per
port.
>
>Thresholds and the defaults are indeed distinct.  Typically there will be
>more thresholds than defaults.
>
>For the example under discussion (15-minute near-end and far-end SES counts
>for a box with one DS1 port, one DS2 port, one OC3c port, and two OC12c
>ports) I get the following tally:
>
>   Parameter                  Number of Defaults   Number of Thresholds
>   ---------                  ------------------   --------------------
>
>   dsx1CurrentSESs             2 (DS1 & DS2)       2 (1 x DS1 & 1 x DS2)
>
>   dsx1FarEndCurrentSESs       2 (DS1 & DS2)       2 (1 x DS1 & 1 x DS2)
>
>   sonetSectionCurrentSESs     2 (OC3 & OC12)      3 (1 x OC3 & 2 x OC12)
>
>   sonetLineCurrentSESs        2 (OC3 & OC12)      3 (1 x OC3 & 2 x OC12)
>   sonetFarEndLineCurrentSESs  2 (OC3 & OC12)      3 (1 x OC3 & 2 x OC12)
>
>   sonetPathCurrentSESs        2 (STS3c & STS12c)  3 (1 x STS3c & 2 x STS12c)
>   sonetFarEndPathCurrentSESs  2 (STS3c & STS12c)  3 (1 x STS3c & 2 x STS12c)
>
>   Totals                      14                  19
>
>>
>>	Ken
>>
>
>Mike
>--
>C. M. Heard/VVNET, Inc.
>heard@vvnet.com
>
>
>