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SECTION XXXXXXX-XX
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D4-
n
x 56/64 DSU DP
n
x 56/64 kB/s
Data Service Unit Dataport
FEATURES BENEFITS
• Plugs into WECO
®
D4 or equivalent, SLC 96, and • Compatible with a large installed base of channel
the ADTRAN ACT 1 and AD4-24 channel banks banks
• Operates at data rates of
n
x 56 or
n
x 64 where • Numerous bandwidth requirements supported by
n
= 1 to 24 or 56 kB/s to 1.536 MB/s one card
• Supports 64K Clear Channel operation • Allows more efficient utilization of network bandwidth
• Selectable stuff bit in non-Clear Channel (56 kB/s) • Ensures network required 1s density; provides
mode capability to avoid false yellow alarm occurrences
• Data may be assigned to consecutive or alternating • Supports full and fractional T1 network services
time slots
• EIA 530 and V.35 interfaces supported • Compatible with existing DTE interfaces
• Allows for bridging by disabling received data and • Provides for both point-to-point and multipoint modes
timing outputs while allowing transmit data and
timing inputs to be unterminated
• Test modes include Local Loopback, Remote • Enables quick and accurate problem isolation
Loopback (V.54 compatible), Remote Loopback
with Test Pattern, Self Test
• Provides both internal and external transmit clock • Enhances network synchronization options
selections
DESCRIPTION
The ADTRAN
n
x 56/64 DSU DP allows for connection
of Data Terminal Equipment (DTE) devices at very high
data rates. The
n
x 56/64 DSU DP accepts data from the
customer over either an EIA-530 or V.35 interface. It then
translates the composite bandwidth from the user into
individual 56 or 64 kB/s channels for transport through
either public or private network facilities. The number of
time slots utilized, which determines the amount of
bandwidth available to the user, is selected by setting the
two rotary switches that program the value of
n.
An
additional switch option allows for selecting 56 kB/s or 64
kB/s mode. The network must be capable of transporting
64 kB/s Clear Channel data before this option may be
utilized.
The combination of these two parameters determines
the operating bandwidth. This allows for data rates from
56K (
n
= 1 and 56K mode) to 1.536 MB/s (
n
= 24 and 64K
mode). Data from the
n
x 56/64 DSU DP, in the form of
individual time slots of information, is routed to the
common equipment section of the channel bank. There,
it is combined with information from other channel unit
devices to form a composite T1 stream. The T1 signal is
then available for transport over existing T1 or fractional
T1 service offerings. The inverse of the procedure
described above occurs at the remote channel bank
location and the composite bandwidth is reconstructed
and delivered to the remote user.
®WECO is a registered trademark of AT&T Technologies, Inc.
n
x 56/64 OPERATION (CONCEPTUAL)
ADTRAN ACT1 (or D4) CHANNEL BANK
EIA 530
384 kB/s DATA
n
x56/64 DSU DP
N=6
64K MODE
n
x
56/64
176543224
6 TIME SLOTS
@ 64K=384K
NETWORK
T1
n
x
56/64
n
x
56/64
n
x
56/64
n
x
56/64
n
x
56/64