Omnitron Systems Technology 400 User Manual
Omnitron Systems
............................................................................................................
T echnology, Inc.
OmniMux™ 400
AS400/3X 5250 and 5250 Express Multiplexer
FEATURES DESCRIPTION
Twinax 5250 and 5250 Express compatible multiplexer
that concentrates AS/400 or system 3X twinax cables
and delivers them to distances up to 25,000 feet via a
fiber pair, twisted pair or a single twinax.
Seamlessly connects to IBM AS/400 and 3X local and
remote twinax controllers and workstations.
Operates with traditional twinax cabling or modern
fiber and twisted pair wiring.
Retiming repeater technology regenerates and reclocks
data, eliminating clock jitter and noise.
Digital Phase Locked Architecture provides acquisition
of data rates of 1 Mbps for 5250 or 2 Mbps for 5250
Express (-2%, +4%), resulting in high immunity to
noise and crosstalk.
Twinax or RJ11/45 connectors and polarity controls
provide easy installation and flexibility.
Clear display and software independence make
installation and monitoring intuitive and easy.
The OmniMux™ 400 is an IBM compatible multiplexer that
provides part or full local or remote 5250 and 5250 Express twinax
controller connectivity to a distant location. It replaces up to
eight AS/400 twinax cables with a single link. This link may be a
twinax, twisted pair or a multimode or single-mode fiber pair.
Optionally , the OmniM ux can eliminate the twinax distribution
box ("brick") and provide a direct single cable connection to the
host controller, r eplacing all host controller twinax with a single
DB25 cable. The OmniM ux supports up to 56 addresses per link.
The OmniMux operates as a multiplexer (M ux), a demultiplexer
(Demux), a demultiplexer-star (Demux-Star) or a star.
In the Mux and Demux modes, the OmniM ux operates in pairs.
On the host side, the Mux is connected to the local or remote
controller’s twinax connectors, concentrating their twinax ports
into a single link. At the far end, the Demux recreates each host
port. Each port behaves as the original host port it is recreating.
It can connect to the distant workstations via twinax daisy chains,
twisted pair star hubs, such as the OmniStar™, or via fiber to
desk repeaters, such as the OmniRepeater™ FTD.
Omnitron Systems Technology, Inc. • 140 Technology Dr., Suite 500 • Irvine, CA 92618 • 949.250.6510 tel. • 949.250.6514 fax • www.omnitron-systems.com
In the Star mode, the OmniM ux delivers twisted pair or twinax
connectivity to the workstation while providing fiber connectivity
back to the host end. The fiber conversion at the host end can be
TM
done using any OmniRepeater
fiber converter.
The Demux-Star mode is used for multi-drop applications, when
seven or less workstations at the far end are required. In this
configuration, the OmniMux with an OmniM ux XL multi-port
mux supports the multi-drop requirement and allows a single
host port to be selected for delivery to the far end.
The OmniMux utilizes a Digital Phase Locked Architecture
(PLA). It facilitates data synchronization of data rate variations
of up to -2% to +4%. It also facilitates a high degree of noise and
crosstalk immunity . Each port is monitored and each data packet
is analyzed for validity and errors. Noisy, shorted or open ports
are automatically ignored and only valid data is processed. The
retransmitted data is repeated, regenerated and reshaped; this
ensures its reliable delivery to its destination.
The Express models operate with both the 5250 and 5250 Express
protocols. Each port provides data rates of 1 Mbps for standard
5250 and 2 Mbps for 5250 Express protocol.
The host and workstations can be connected via twinax, RJ11/45
twisted pairs or a 25-pin DB25 cable. The twisted pair polarity
control allows interface to different baluns.
Processing: Once the data has been reco vered and synchronized,
it is processed internally for validity. The processor analyzes the
Frame Header, expecting at least 3 Sync bits followed by a Code
Violation. When a legal Frame Header is detected, the port is
“marked” active and the data is allowed to be retransmitted.
Outputs: The retransmitted data is fully regenerated and
reclocked. Lost sync bits are restored, and the data is reclocked at
a 50% duty cycle, eliminating any accumulated phase shift and
clock jitter. The regenerated signal is restored to its nominal shape
and amplitude and the pre-distortion logic compensates for
anticipated phase shift and attenuation.
Displays: P er port true data activity and parity errors are displayed
by green and red LEDs. The green activity LEDs assist in
monitoring signal strength and polarity. The red Parity Error
LEDs assist in monitoring connectivity quality, signal strength,
impedance mismatches and reflections.
Auto Link Backup: Utilizing two links simultaneously pro vides
link redundancy. The primary F/O link can be backed up by a
“Standby” twinax or UTP link. Switching between the primary
and secondary links is done automatically by the hardware. The
Activity LEDs report the activity of each link.
Utilizing two links simultaneously provides a hot backup
connection for fault tolerance in critical applications.
The OmniMux diagnostics detect and display true port activity
and parity errors. Each port is monitored for valid frame header
patterns, a detected pattern is displayed via a per-port green
Activity LED. The data is analyzed for parity errors; a detected
error is displayed via a per-port red Error LED. These features
assist in installation and monitoring of the OmniMux operation.
The OmniMux
400 is completely software transparent and no
setup or any changes are required.
OPERATION
Inputs: The OmniMux 400 is built around a Digital Phased
Locked Architecture (PLA). It allows the independent monitoring
and processing of data signals at each individual port,
discriminating between true data and noise. A priority mechanism
increases isolation between individual ports, reducing any
crosstalk effect. The incoming M anchester encoded data is oversampled at a rate of 16 samples per bit cell. This sampling rate is
instrumental in the digital filtering of noise. A unique clock
extraction technology facilitates the synchronization to data, with
frequency variations of -2% to +4%.
SAMPLE APPLICATIONS
The following illustrations depict several sample applications of
the OmniMux 400:
Application 1. Standard Local Controller E xtension
In this application, four AS/400 controller ports must be extended
via fiber across a campus to a second building.
The host (a) is connected to the Mux (c) using baluns and UTP
cabling (b). A fiber optic cable (d) connects to the Demux (e)
which connects each port to a UTP star that provides UTP
connectivity to each workstation (f).
AS/400
AS/400
(a)
(a)
(c) Mux
(c) Mux
OmniMux 400
twinax
twinax
"brick"
"brick"
ds27001
ds27001
(b) baluns and
(b) baluns and
twisted pair
twisted pair
wiring (UTP)
wiring (UTP)
OmniMux 400
(d) fiber
(d) fiber
(e) Demux
(e) Demux
(f) UTP to workstations
(f) UTP to workstations
OmniMux 400
OmniMux 400
OmniStar 400
OmniStar 400
Omnitron Systems Technology, Inc. • 140 Technology Dr., Suite 500 • Irvine, CA 92618 • 949.250.6510 tel. • 949.250.6514 fax • www.omnitron-systems.com
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