I was recently looking for this kind of info myslef. Seems that most of the
connectivity maps, etc. that I came across were a year or 2 out of date.
FWIW, I have a collection of links concerning international L1, L2, and some
L3 connectivity on my ISP page. By no means a complete reference, but it
might give you a start.
Randy Benn
http://www.clark.net/pub/rbenn/isp.html
We currently have SprintLink T-1 service. We have very low utilization on
that link, and so save money we requested to be downgraded to 256K.
Now it is my understanding that this should be very, very simple. Sprint
just configures their CSU/DSU to not use timeslots 5 - 24. This, of course
would bring the link down until we configured our CSU/DSU to not use
timeslots 5 - 24. Ta ta! 256K. Right?
Well, BellSouth just showed up to install our "new" T-1 to SprintLink. Huh?
I told them to go away until I had more information.
Is SprintLink being a bonehead or am I just totally clueless?
--Eric
We currently have SprintLink T-1 service. We have very low utilization on
that link, and so save money we requested to be downgraded to 256K.
Downgrading? There's no such thing. Upgrading service is
common and installation charges are often waived. Downgrading
means you requested a new install of a 256K circuit. Now
you could try and specify that they use the same span, but
your salesperson is unlikely to want to do that -- because
it cause MORE paperwork for them for a lesser return.
E
IOW, Sprint _is_ being a bonehead.
No, he did _not_ request an install of a new 256K circuit. No,
downgrading does _not_ mean that. My suggection would be, if they're
going to be that stupid, and you have to have a new circuit installed
anyway... get it from someone else.
Cheers,
-- jra
Could be that they physically handle full and partial T1 circuits on
different facilities. I would imagine that Sprint brings in many circuits
on a large trunk so, to avoid the interruption of moving one end of the
circuit which could take it down for hours while the telco does their work,
they just install a new circuit and the customer does a cutover.
Brian
>We currently have SprintLink T-1 service. We have very low
utilization on
>that link, and so save money we requested to be downgraded to 256K.
>Well, BellSouth just showed up to install our "new" T-1 to SprintLink.
Huh?
>I told them to go away until I had more information.
>Is SprintLink being a bonehead or am I just totally clueless?Downgrading? There's no such thing. Upgrading service is
common and installation charges are often waived. Downgrading
means you requested a new install of a 256K circuit. Now
you could try and specify that they use the same span, but
your salesperson is unlikely to want to do that -- because
it cause MORE paperwork for them for a lesser return.IOW, Sprint _is_ being a bonehead.
No, he did _not_ request an install of a new 256K circuit. No,
downgrading does _not_ mean that. My suggection would be, if they're
going to be that stupid, and you have to have a new circuit installed
anyway... get it from someone else.Cheers,
-- jra
--
Jay R. Ashworth
Member of the Technical Staff Unsolicited Commercial Emailers
Sued
The Suncoast Freenet "People propose, science studies, technology
Tampa Bay, Florida conforms." -- Dr. Don Norman +1 813 790
7592
It could, I suppose... but it's not too likely. I presume you mean
that they terminate Full- and Frac-T services on different routers at
their end? Maybe, but who cares? I've done this sort of thing on Frame
circuits, and it runs just the way he expected: you put two people on
the circuit on the phone, they both flip the same switched at the same
time, and your throughput changes. If they'll _upgrade_ you from Frac-
to Full- that way, why in hell won't they downgrade you?
The finances should be immaterial to the engineering, in this case.
Cheers,
-- jra
It may be a little more complicated than you think. My first question is
whether you are currently paying for M24 functionality on the T1. M24 allows
the carrier to break the T1 signal down to 24 DS0 signals.
I've never heard that terminology before. There are M12 muxes and M13 muxes
that mux DS1's into DS2's or DS3's, 4 and 28 respectively. But I've never
heard of an M01; those are usually called channel banks. The term M24
doesn't fit the pattern of the other names.
Nevertheless, you are right that if the T1 doesn't terminate in a facility
where it can be easily moved to a mux that would explain why they want to
install a new circuit. They don't care if half of your local loop is unused
because you pay full T1 rates for that anyway. But beyond the local loop
they will probably want to aggregate your 256K circuit with their other
fractional T1s.