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DSU III S2W
2-Wire Switched 56 DSU/CSU
The unit responds to standard loopback
commands from the service provider and
provides extensive test capabilities. Tests
include DTE, DTE and loop, DTE with test
pattern, and loop only.
The front panel of the standalone
DSU III S2W contains a two-line by
16-character LCD display and seven LEDs.
The front panel keypad operates a simple
menu structure which accesses setup,
selection of test modes, local configuration,
and manual or automatic dialing from
stored numbers. Configuration is also
available by using the AT command set.
PC
Ethernet LAN
Frame
Relay/DDS
4W
2W
DSU III S2W
DSU III S2W
Product Features
■ Dialing by V.25 bis,
EIA-366, enhanced AT
command set, keypad
or stored number
■ Compatible with Northern
Telecom Datapath
™
technology
■ EIA-232 and V.35 DTE
interfaces
■ Auxiliary EIA-232 or
EIA-366 dialing interface
■ Multiple tests and
diagnostics
■ Synchronous and a
synchronous features
(including 38.4 and
57.6 kbps) DTE rates
■ T-Link rate
adaption protocol
■ Auto answer of
incoming calls
■ Industry-leading five-year
North American warranty
The ADTRAN
®
DSU III S2W is a high-perform-
ance data service unit/channel service unit
(DSU/CSU) based on Northern Telecom
Datapath
®
technology. The DSU III S2W
incorporates advanced features utilizing
microprocessor and VLSI technology in a
standalone package. Using the Northern
Telecom T-Link
®
rate adaption protocol and
time compression multiplexing (TCM), the
DSU III S2W transports customer synchro-
nous (up to 64 kbps) or asynchronous (up to
57.6 kbps) data over a 2-wire local loop to the
network. Both EIA-232 and V.35 DTE inter-
faces are provided for all data rates.
The DSU III S2W supports manual
(invoking a stored number or keypad) or
automatic dialing. DTE interface dialing is
supported by use of AT commands or V.25 bis
in-band dialing. A separate DB-25 connector
is provided for EIA-366 parallel dialing or out-
of-band AT dialing.