| 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, T1 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 video-conferencing 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 T1 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
VT 100 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 video-conferencing. The ISU 512 also supports
dedicated 2B1Q services. This provides a dedicated
point-to-point service (as in a limited distance modern
or leased line application) with no dialing necessary.
Features
- Basic inverse
multiplexer supports a single high-speed data
application rate
- Low-cost inverse
multiplexing
- Applications include
videoconferencing, LAN/WAN connectivity, high-speed
file transfer, and T1 backup
- Supports up to four
ISDN Basic Rate lines
- Operates at
synchronous data rates of up to 512 kbps
- Supports industry
standard BONDING
- Dialing options
include front panel, stored number, V.25 bis, DTR
dialing, and an RS-366 dial interface
- Flash memory for easy
upgrades
- Remote configuration
over ISDN line or externally
- Compatible with Lucent
5ESS, Northern Telecom DMS-100, and National ISDN-1
switches
- Standard 5-year
Warranty
Product Specifications
NETWORK
INTERFACE
- Four RJ-45s
for ISDN 2B1Q Basic Rate U-Interface or
S/T-Interface
DTE INTERFACE
- RS-530 or V.35
(both connectors present) (RS-530 to V.35
adapter cable available)
DIALING
SELECTIONS
- Manual or
automatic stored number dialing
- In-Band DTE
Dialing: V.25 bis, AT commands
- DTR assertion
DIAL INTERFACE
- RS-366 data
rates (DTE)
- 56 kbps to 512
kbps synchronous data rates (network)
- Up to four
BRIs (Maximum of eight 56/64 kbps B
channels)
PROTOCOLS
- Clear Channel,
BONDING Mode 1 Interoperability
- BONDING-compatible
inverse multiplexers, Switched 56 DSUs, ISDN
TAs, ISUs
SWITCH
COMPATIBILITY
- National
ISDN-1, Lucent 5ESS, NTI DMS-100, NEC
DIAGNOSTIC AND
TESTING
- Local and
remote loopbacks, V.54 loopback, 2047
pattern, Remote configuration
DISPLAY
- Two-line x
16-character LCD
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ENVIRONMENTAL
Operating
Temperature
Storage
Temperature
- -20° to 70°C,
-4° to 158°F
Relative
Humidity
- Up to 95%,
non-condensing
PHYSICAL
Dimensions
- 2.5" H,
7.875" W, 10.5" D
Weight
Power
- 115 VAC, 60
Hz, 8 watts maximum dissipation
PRODUCT INCLUDES
- ISU 512
- Four 7-foot
RJ-45 telephone cables
- User Manual
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE.
Rackmount
Shelf for 2 units.
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Ordering Information
- ISU 512 -
1202086L1
- ISU 512 S/T -
1202086L3
- RS-530 to V.35
cable* - 1200072L1
- RS-366 Y cable*
- 1200120L1
- ISU 512 with RE-530
and RS-366 Y cables* - 4202086L1
- ISU 512 S/T with
RE-530 and RS-366 Y cables* - 4202086L3
*For 112/128 kbps dual port video-conferencing
applications these cables may be necessary
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