from RAD Data Communications
ASM-20 Short Range Modem operates synchronously or
asynchronously (strap-selectable) at full or half
duplex over unconditioned lines. It has a range of
up to 23 km (14 miles) and operates at data rates
between 19.2 kbps and 256 kbps. The use of conditioned
diphase modulation (EUROCOM Std. D1) provides immunity
to background noise, eliminates normal line distortion
and enables efficient transmission and reception of
serial data over twisted pair cable. Transmit timing
is provided internally, or is derived externally from
the data terminal or receive signal. Receive timing
is regenerated from the data.
When set to async mode, ASM-20 performs async to sync
conversion in compliance with ITU V.14 standard.
rates higher than 115.2 kbps are supported in sync
mode only. ASM-20 features V.54 diagnostic capabilities
to perform local analog loopback, and local and remote
digital loopback. The loops can be manually activated
from the front panel or via control signals from the
interface connector. In addition, ASM-20 incorporates
a built-in Bit Error Rate Tester (BERT) to enable
complete testing of both modems and the line. A front
panel switch generates a pseudo-random test pattern
(511 bits) according to ITU V.52, for testing end-to-end
connectivity. An ERROR LED flashes when a bit error
is available as a desktop unit or as a card for the
ASM-MN-214 modem rack. The rack can carry up to 14
ASM-20 cards and is supplied with 25-pin D-type connectors.
Optional hardware is available for mounting one or
two standalone units in a 19" rack.
HDSL Termination Unit
The terminal unit, HTU-E1/HTU-E1L using HDSL technology
extends the range of E1 equipment to up to 4.8 km
(3 miles) over 24 AWG (0.5 mm), 4-wire copper cable.
Using the HDSL repeater, it extends the range to up
to 8.4 km (5.2 miles) between the central office and
customer premises. HTU-E1/HTU-E1L eliminates the need
for repeaters or optical cable in the last mile (local
loop) or in the campus network environment. Using
advanced equalization, adaptive-filtering, echo cancellation
technology and 2B1Q line coding, HTU-E1/HTU-E1L compensates
for line impairments, and bridge taps and mixed cabling.
High immunity to background noise enables transmission
of multiple HDSL lines in the same physical cable.
clock modes, internal and external are available.
Setup, control and monitoring of status and diagnostics
information can be performed using one of the following:
panel LCD with three push buttons, using menu-driven
terminal connected to the async control port using
command line interpreter.
management station connected to the async control
port, using Serial Link
priority-bumping feature allows the user to select
the timeslot priority (high or low) in case one of
the HDSL lines is down. HTU-E1 is available as a standalone
unit or as a rack-mount card (HTU-E1C) for the LRS-12
modem rack. The HTU-E1C card can provide a remote
power feed for an HDSL repeater or an HTU-E1L unit.
For the remote power feeding option, a standalone
power supply, LRS-PS-FEED, should be ordered separately.
Networks has launched the X-Pedition ER16 backbone
routing platform. Designed to meet the demand on the
enterprise core backbone, it is targeted at corporate
networks and e-businesses.
ER16 delivers four times the Gigabit routing capacity
as Enterasys' current routing offerings, and provides
a set of advanced application services, including
traffic prioritization, traffic shaping, multilayer
security, application load balancing, application
content verification and high availability. These
advanced services provide critical control of business-centric
applications such as enterprise resource planning
(ERP), SAP, database, e-commerce, multimedia, and
converged voice, video and data.
F840 Enterprise Filers
Appliance storage appliances, or filers, consolidate
Unix, Windows, and web data, for data and storage
management. As dedicated appliances, NetApp filers
optimally serve and manage data. NetApp filers provide
a simple, yet powerful data management solution for
improving performance, ensuring continuous availability,
and minimizing infrastructure costs. NetApp F840 filers
offer many advantages for databases and data warehousing,
e-commerce, news, e-mail and web content hosting,
corporate home directories and collaborative databases,
and technical applications including engineering design,
software development, scientific computing, and earth
F840 enterprise filers deliver data access anytime
and anywhere. The flexible, multiprotocol Network
Appliance architecture enables simultaneous file sharing
of Unix, Windows, and web data by users and application
servers from across the corporate network. The NetApp
design optimizes data access for consolidated, multiuser
environments as well as dedicated access by demanding
application servers and server clusters.
features fibre channel disk subsystem, high-speed
networking capabilities, and the high-performance
Data ONTAP microkernel. NetApp F840 enterprise filers
scale to support thousands of users and transactions
and up to 12 TB of data within single or multiple
Server 4100 from Quantum
Snap Server file server is available in 120GB or 240
GB and takes only five minutes to install. The Snap
Server 4100 offers data protection with RAID 1 mirroring
and RAID 5 striping with parity (factory default).
Efficient design to hardware and the maturity of the
embedded OS make the Snap Server extremely reliable
and robust. This server is the only one that automatically
offers Windows, NetWare, Macintosh and Unix/Linux
users transparent multi-platform file sharing.
servers have been engineered for network file sharing.
The Snap Server 4100 offers RAID 0 with true data
striping performance and can easily support a department
of 150 or more users.