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Product
Information
Integrated Access:
Integrated access solutions consolidate
voice, data, and Internet network services on a single platform
over shared high-speed access lines to increase network
efficiencies and reduce costs.
T1 (DS1): A
high-speed line capable of delivering 1.54 Mbps (1,540K) in both
directions, allowing for 24 data-bearing channels.
PRI
(Primary Rate Interface): An
ISDN service that provides 23 x 64Kbps B (Bearer) channels and 1
x 64Kbps D (data) channel; (23B+1D) equivalent to the 24
channels of a T1 line. Most often used for local access
voice with DID (Direct Inward Dialing) numbers.
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Is a two pair of twisted
copper wires, one pair for each direction.
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Can go
any distance by using repeaters from a vendor's central switch.
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A full
T1 line transmits at 1.544 mbps bidirectional.
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A full
T1 line carries 24 DS0 channels.
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A DS0 channel
can be either 64 Kbps of digital data OR one voice line.
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A fractional
T1 line is a line with fewer than 24 DS0 channels, thus costing
less.
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A bonded
T1 line is multiple T1 lines running to the router (T1x2 to
T1 x 6).
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Bonded
lines transmit from 3 to 9 meg. Anything higher uses a fractional
T3 line.
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A point
to point T1 line is one that is a direct connect to another
computer.
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An integrated
T1 line is a T1 with some DS0 channels voice, other channels
data.
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A dynamic
T1 line is where unused voice lines convert to data lines.
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A router
determines the voice/data mix of the various T1 lines.
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A router
can treat each DS0 channel separately or all 24 as one data
line.
T1
ORDERS
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Is usually installed
within 30 to 45 days after contract is approved
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T1-Now usually gets faster
results on install, shortening it by 1 to 10 days.
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Contract is normally
approved within 3 to 5 days of signing.
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Main delay in approval
is the credit application.
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All types of T1 lines
come in one year, two year or three year contracts.
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Backup redundancy
can be achieved by a router that handles a DSL backup line.
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Routers can come from
the vendor, customer or T1-Now (Cisco, Tasman, others)
T1
COSTS
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Average cost of a fractional
T1 line starts at $299/month for 378 Kbps bidirectional
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Average cost a full T1
(all data) ranges from $370 to $669/month
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T1 line costs vary
by managed (vendor supplied) or unmanaged (customer owned)
router
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T3 line costs vary by
distance from the vendor's POP (with selected vendors)
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Selected vendors may
offer lowest price with one year contracts versus others 3 year
contracts
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Standard contracts offer
lowest prices at 3 years, we can sometimes get it at 1 year-
a router can be maintained either by the user or by the T1
line vendor at extra cost.
DEFINITIONS
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T1 lines
are technically referred to as T1 or DS1 channels.
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1 T3 channel
= 28 T1 channels = 672 DS0 channels = 44.736 Mbps.
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1 T1 channel
= 1 DS1 channel = 24 DS0 channels = 1.544 Mbps.
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1 DS0 channel
can be either 64 kbps of digital data OR one voice line.
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DS = Digital
Signal channel.
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Bidirectional
= can upload and download data at same time.
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Mbps =
mega = million bits per second = 1,048,576 bits = 1 m.
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Kbps =
thousand bits per second = 1024 bits = 1 K. A bit = one binary
digit (a 1 or a 0).
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A bit =
one binary digit (a 1 or a 0).
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POP = Point
of Presence which is the location a line attached to a providers
network.
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