Re: ANSI T1.231 ?

["C. M. Heard/VVNET, Inc." <[e-mail]>]

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.
[e-mail]