Adtran D4-n x 56 DSU DP 用户手册

SECTION   

XXXXXXX

-

XX

•

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

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.

nx56/64

1

7

6

5

4

3

2

24

nx56/64 nx56/64 nx56/64 nx56/64

nx56/64