As far as I know both DS and Vodafone have 2.5Gbit STM-16 circuits.
The 1Tb that Vodafone mention is the potential capacity of any fiber optic
with today's DWDM technology (100+ 10Gbit channels) .... The actual current
capacity is determined by the current interface connected to the fiber and
that's Packet-over-SDH STM-16 i.e. 2.5Gbit. The actual bandwidth on the
circuit is then far less ... depending on how much they purchased from the
international provider .....
Regarding the theoritical limit of any fiber optic, that's arround 120Tbits,
determined by the maximum frequency of visible light.
Regarding the actual bandwidth on their circuits (according to the latest
Maltacom report I read) DS have 622Mbits i.e. STM-4 (I think the 700Mbps
mentioned in the DS press release was just a rounded figure). Whereas the
latest official figure I heard about Vodafone was 90Mbits but probably that
has already increased. However be assured it is nowhere near 2.5Gbit.
One has to distinguish between theoritical capacity, max. capacity given the
latest equipment available, the actual capacity given the actual equipment
being used to terminate the fiber and the actual bandwidth being carried on
the fiber given the amount purchased.
Regards
John
----- Original Message -----
From: "Iain Sims" <[EMAIL PROTECTED]>
To: "jurgen cachia" <[EMAIL PROTECTED]>; "Malta Linux User Group -
general list" <[email protected]>
Sent: Monday, April 25, 2005 09:25
Subject: Re: [LINUX.ORG.MT] Datastream new policy
jurgen cachia wrote:
yws and vodafone has another 1Tb
Disk space on their file servers, perhaps. Bandwidth on their circuit,
doubtful.
Datastream (probably) have only 2x 622Mbps links. What makes you think
that Vodafone will have eight times more the amount of bandwidth than
Datastream?? Again, they're not Datastream's links, they're Maltacom's and
carry more than just IP traffic. And their claim of 700Mbps being used on
international IP tranist is highly dubious. I would suggest someone forgot
to insert a decimal point.
Lies, damn lies and Datastream press releases.
Iain.
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