|
 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Inverse
Multiplexer
-------------
ISU-512
|
 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Features |
 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
-
U-Interface, high-speed inverse
multiplexer for ISDN
-
Terminates up to four BRI lines
-
Includes NT1 functionality
-
Provides for dial up leased line
access
-
Videoconferencing, LAN/WAN
connectivity, high-speed file transfer, audio broadcasting,
and T1 backup applications
-
Synchronous data transfer from 56
Kbps to 512 Kbps
-
BONDING Mode 1 synchronizes data over
up to eight 64 Kbps B-Channels
-
Configuration via front panel keypad,
VT100, or remotely over the ISDN line
-
Dialing via front panel, stored
numbers, DTR assertion, V.25 bis, or RS-366
-
Remote upgrade via flash downloads
-
EIA-530 and V.35 interfaces
-
Available bundled with one RS-530 to
V.35 adapter cable and one RS-366 "Y" cable for dual port
dialing support
-
S/T-Interface version available with
Euro power supplies for multinational applications. Also
available bundled with one RS-530 to V.35 adapter cable and
one RS-366 "Y" cable (Call Pre-Sales Applications
Engineering at 800-615-1176 for up-to-date country
approvals)
-
North American switch type support
for U-Interface and S/T versions include AT&T 5ESS, Northern
Telecom DMS100, National ISDN-1, and NEC
-
Multinational switch type support for
international S/T-Interface version includes TDX10, TDX1B,
Euro-ISDN Net3, and VN4
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Description |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
The ADTRAN ISU™ 512 is a
standalone ISDN Service Unit that connects data terminal
equipment (DTE) to the ISDN network. The ISU 512 is
“specifically designed as a low-cost solution for
applications such as video-conferencing, T-1 backup,
LAN/WAN connectivity, and high-speed file transfer.
The ISU 512 is designed as a cost effective inverse
multiplexer for 384 kbps videoconferencing. Some
videoconferencing products operate in a dual port mode.
The ISU 512 is designed to operate in a dual port mode
making it backward compatible with videoconferencing
systems utilizing two Switched 56 DSUs or a dual port ISDN
terminal adapter.
The ISU 512 connects directly to the ISDN network using up
to four Basic Rate ISDN (BRI) lines. By terminating four
BRI circuits, the ISU 512 can create an aggregate
bandwidth of up to 512 kbps which can be used to backup a
T-1 circuit. Since ISDN is a switched digital service,
bandwidth can be established and utilized on an as needed
basis. Therefore, the ISU 512 is well suited for
applications where a high bandwidth connection is needed
to support bursty or infrequent traffic like medical image
or large file transfer.
The ISU 512 may utilize either the V.35 or RS-530 DTE
interface and supports synchronous data rates from 56 kbps
to 512 kbps. At rates over 64 kbps, the BONDING Mode 1
inverse multiplexing protocol synchronizes data using from
one to eight 64 kbps B channels. By supporting BONDING the
ISU 512 interoperates with other BONDING-compatible
inverse multiplexers and ISDN terminal adapters.
The ISU 512 can be configured and maintained, locally or
remotely, using a VT100 terminal interface. For remote
configuration, the unit can be accessed over the ISDN line
or externally through the CHAIN IN port on the back panel
of the unit. The front panel of the ISU 512 consists of a
two-line by 16 character LCD display, seven LEDs, and a
16-button keypad. This allows for configuring, dialing,
testing, and monitoring of the unit without data terminal
or test equipment. Dialing from the unit is accomplished
by using the front panel, stored numbers, DTR assertion,
or V.25 bis in-band dialing. The RS-366 parallel dial
interface is available for applications such as
videoconferencing.
The ISU 512 also supports dedicated 2B1Q services. This
provides a dedicated point-topoint service (as in a
limited distance modern or leased line application) with
no dialing necessary. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Email
