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squircle

join:2009-06-23
Oakville, ON
reply to jasmo34

Re: [Internet] New 50/10/175 FTTN plan

The difference is the VDSL2 profiles. 50/10 is delivered using profile 17a, which uses 17.664 MHz of spectrum to deliver 100Mb/s max downstream, compared to the current 25/10 plans using profile 12a, 12 MHz of spectrum to deliver maximum 68Mb/s downstream.

In case you ask the question "why couldn't they use 12a for both", it's that these maximum downstream values could only realistically be experienced with extremely short cable lengths; more spectrum is needed to deliver the higher speeds over longer distances.

This is also the reason 50/10 is only offered in very specific areas. Even though I'm 60m loop length from my JWI, I can't get 50/10 because I am served by an old Lucent Stinger DSLAM and not the newer Alcatel-Lucent 7330 DSLAM.

praytorian00

join:2005-05-24
canada
said by squircle:

This is also the reason 50/10 is only offered in very specific areas. Even though I'm 60m loop length from my JWI, I can't get 50/10 because I am served by an old Lucent Stinger DSLAM and not the newer Alcatel-Lucent 7330 DSLAM.

I'm connected to the Alcatel Lucent 7130, able to get 50/10.


squircle

join:2009-06-23
Oakville, ON

1 recommendation

said by praytorian00:

I'm connected to the Alcatel Lucent 7130, able to get 50/10.

There is no 7130 DSLAM. You're probably thinking of the ALU 7130 Cellpipe modem.