Note the above was blurbed completely off the top of my head.....which makes it all the more impressive :)
Short/Medium lines that are say on fixed 2Mb or even 8Mb will often have power cutback applied and therefore you cant estimate anything from the 'surplus SNRM'.
Strangely enough I have just been reading about NeXT and FeXT so at least I know what they mean now. Apparently FeXT is less serious as it means Near End Crosstalk, i.e. crosstalk on the upstream from the users end and vis versa for NeXT. Wow I'm starting to understand some of this. :thumbs:
Short/Medium lines that are say on fixed 2Mb or even 8Mb will often have power cutback applied and therefore you cant estimate anything from the 'surplus SNRM'.
BTW - that's something that else I've learned from you today, and a trap I may well have fallen into in the past. :-[
and thats when my brain refuses to store any more and I start just using 'x' :(
The categorization of customers’ locations is in terms of ‘electrical distance’ from the MDF, defined by loss values at 100 kHz, for a nominal line to the MDF.
Category name Is applied to interfaces at these locations up extra short the customer NTP where electrical distance from the MDF is 21 dB or less up short the customer NTP where electrical distance is 26 dB or less but over 21 dB up medium the customer NTP where electrical distance is 29 dB or less but over 26 dB up long the customer NTP where electrical distance from the MDF is over 29 dB