Omnitron Systems Technology GX/F プリント

This document supports revision “xx/10” of the GX/F.
Please refer to the serial number label on the GX/F for
the revision number of your product. This revision
incorporates the following improvements to the GX/F:

1. Product enhancements now prevent unpredictable
behavior  under undefined or incompatible DIP-Switch
selections.

2.  LINK MODES have been increased to include RFD+LS
and RFD+LP modes. Improvements to LED behavior
have been made to accommodate these new link modes.

The 

 GX/F media converter provides Gigabit

1000X fiber to Fast Ethernet 100FX fiber conversion. It
is a member of the modular 

  product family

and supports multimode, single-mode and single-fiber
options. The 

 GX/F repeats, regenerates and

re-times the fiber optic signal, and multiple GX/F repeaters
can be cascaded to extend total network distances.

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Using its switch-based architecture, the GX/F can be
used as a two-port fiber converter, or using its two
additional 10/100 Ethernet backplane ports, it can
connect to adjacent modules and accommodate
In-Band management or multi-module configurations
(the different 

 Chassis models provide

backplane links to connect between adjacent modules).

The GX/F can be used in an unmanaged or managed
fashion. When unmanaged, it can be installed in a chassis
without a management module. To be managed, a
Network Management Module (NMM) or an 

module with built-in management (such as a 10/100M or
GX/TM) must be installed in the same chassis.

The GX/F features Port VLAN and Tag VLAN, which allow
control of traffic flow between both the fiber ports and the
backplane ports. It also features Port  Access Control,
which facilitates enabling and disabling of individual ports.

The GX/F supports reporting of MIB statistics.  Statistics
are available for 32 variables per port, reporting a wide
range of real-time packet statistics to provide
performance and operational monitoring.

 Management Software,

Using a 4-port switch design, the GX/F features a front-
plane 1000Mbps Gigabit fiber port (P1), a 100Mbps
Fast Ethernet fiber port (P2) and two 10/100 Ethernet
backplane copper ports (“A” and “B”) that can connect
to adjacent modules within the same chassis.

When the GX/F “A” and “B” Ethernet backplane ports are
enabled (using the “BPAEN” and “BPBEN” DIP-Switches),
they connect via the chassis backplane to the slots on
the left and right sides of the GX/F module. When another
switch-based module with backplane ports such as a
second GX/F or an NMM is installed in an adjacent slot, it
can be connected via the backplane to the GX/F to form
a multi-module configuration.

Chassis

Backplane

GX/F Module

Internal

10/100/1000

switch chip

Fiber

1000 port

Fiber

100 port

NMM Module

NMM

front /

back

select

NMM UTP

10 port

4Tx Module

Internal

10/100

switch chip

4-port 10/100 UTP

Switch

“A” Link

“B” Link

A Port

B Port

A Port

B Port

A Port

B Port

Slot 1 (odd)

Slot 2 (even)

Slot 3 (odd)

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Fig. 1 depicts a chassis with three modules plugged
into three of its adjacent backplane slots (beginning
with an odd numbered slot).  The adjacent slots are
connected via the backplane using the “A” and “B”
10/100 links.  In this example, the GX/F in the center
slot connects to the slot on its left using the “A” link
and to the slot on its right using the “B” link.

The module on the left is a Network Management Module
(NMM) connecting via its “A” backplane port to the GX/F,
facilitating “In-Band” management (via the fiber uplink).
The module on the right is a 4-port 10/100 switch module
(4Tx) connecting to the GX/F via its “B” port. This 3-module
configuration forms an effective managed 4-port 10/100
Ethernet switch with one Gigabit fiber uplink port and one
Fast Ethernet fiber port.

This example shows how the GX/F can be used as a managed
or unmanaged media converter or as a building block in
creating flexible and effective network switch configurations.

In order to accommodate different user needs, the GX/F
supports five different linking modes (see Fig. 2).

In “Link Segment” (LS) mode (“Normal” mode), a port transmits
a Link signal independently of any received Link at any port.
For example, P2 transmits a Link regardless of the receiving
of a Link at P1 [Fig. 2(a) & 2(b)].

In “Link Propagate” (LP) mode (sometimes referred
to as  “Link-Loss-Carry-Forward”), a port transmits a
Link signal only when receiving a Link on the other

front-plane port, and a loss of a received Link at one
port causes the other front-plane port to drop its link
out. For example, P2 transmits a Link only when
receiving a Link at P1 [Fig. 2(c)].

In Remote Fault Detection + Link Segment (RFD+LS),
the fiber port transmits a Link signal only when receiving
a Link at the fiber port.  As a result, fiber faults (no Link
received at the fiber) are looped-back and can be
reported to the network core [Fig. 2(d)].

In “Remote Fault Detection + Link Propagate” (RFD+LP)
mode, the P1 port transmits a Link signal only when both it
and P2 are receiving Link signals. A loss of a received Link
signal at P1 is Looped-back to P1 and propagated to P2,
causing both to stop transmitting the Link signal [Fig. 2(e)].
Also, the loss of a received Link at P2 is propagated to
both P1 and P2, which stop transmitting the Link signal.

“Symmetrical Fault Detection” (SFD) mode operates
similarly to the Remote Fault Detection (RFD) mode. In
SFD mode, the loss of a received Link at P1 is Looped-
Back to P1 and propagated to P2, causing both to stop
transmitting the Link signal [Fig. 2(f)] and also causing
blinking in a connected GX/F P1 “Link” LED indicator.

Connecting two converters which are both set to SFD is
permitted and facilitates a dual-loop-back feature where
P1 fiber faults can be reported to both ends of the network.

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(e)

(d)

(a)

(b)

(c)

(f)

LED Status depends on connected device

LED Lit

LED Blinking

LED Off

LED Status (Blinking/off) depends on connected device

 GX/F Dual/Single-Fiber Converters

MM /  220m / 550m 

1

 /

850nm

SM / 20km /

Tx 1310nm, Rx 1550nm

8562-05

MM /  220m / 550m 

1

 /

850nm

SM / 40km /

Tx 1310nm, Rx 1550nm

8562-06

MM /  220m / 550m 

1

 /

850nm

SM / 20km /

Tx 1550nm, Rx 1310nm

8562-07

MM /  220m / 550m 

1

 /

850nm

SM / 40km /

Tx 1550nm, Rx 1310nm

8562-08

SM / 12km / 1310nm

SM / 20km /

Tx 1310nm, Rx 1550nm

8563-15

SM / 12km / 1310nm

SM / 40km /

Tx 1310nm, Rx 1550nm

8563-16

SM / 12km / 1310nm

SM / 20km /

Tx 1550nm, Rx 1310nm

8563-17

SM / 12km / 1310nm

SM / 40km /

Tx 1310nm, Rx 1550nm

8563-18

 For wide temperature (-40 to 60º C), add a "W" to the end of the model
 number. Consult factory for extended temperature (-40 to +75º C) models.
 When using single-fiber (SF) media converter models, the Tx wavelength
 on one end has to match the Rx wavelength on the other.
 

1 

62.5/125µm, 100/140µm multimode fiber up to 220m. 50/125µm

 multimode fiber up to 550m. Refer to the fiber cable manufacturer for
 multimode distance specifications.

 GX/F Dual Fiber Converters

MM /  220m /

550m 

1

 / 850nm

MM / 5km /

1310nm

8562-00

-

8564-00

MM /  220m /

550m 

1

 / 850nm

SM / 30km /

1310nm

8562-01

-

8564-01

MM /  220m /

550m 

1

 / 850nm

SM / 60km /

1310nm

8562-02

-

-

MM /  220m /

550m 

1

 / 850nm

SM / 120km /

1550nm

8562-03

-

-

SM / 12km /

1310nm

MM / 5km /

1310nm

8563-10

-

8565-10

SM / 12km /

1310nm

SM / 30km /

1310nm

8563-11

8567-11

8565-11

SM / 12km /

1310nm

SM / 60km /

1310nm

8563-12

8567-12

-

SM / 12km /

1310nm

SM / 120km /

1550nm

8563-13

8567-13

-

 For wide temperature (-40 to 60º C), add a "W" to the end of the model
 number. Consult factory for extended temperature (-40 to +75º C

 ) models.

 When using single-fiber (SF) media converter models, the Tx wavelength
 on one end has to match the Rx wavelength on the other.
 

1 

62.5/125µm, 100/140µm multimode fiber up to 220m. 50/125µm

 multimode fiber up to 550m. Refer to the fiber cable manufacturer for
 multimode distance specifications.