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MCC-DFL QUICK REFERENCE
QR.1 SETTING SWITCHES AND JUMPERS
Location of SW1/SW2 Switchblocks And Jumpers P1/P2
(Default Settings)
Copyright 1997 by Cabletron Systems, Inc., P.O. Box 5005, Rochester, NH 03866-5005
All Rights Reserved
Printed in the United States of America
Order Number: 9032131-01 July, 1997
The Complete Networking Soluti
on
SW2
1234
SW1
1234
SW1
1234
SW2
1234
OFF
ON
OFF
ON
P1
P2
P2
P1
SW1 (FOT-A or RI)
On – Cabletron fiber key
Off – 802.5J fiber key
On – RO or lobe (RJ45 port)
Off – RI or station (RJ45 port)
On – Autowrap enable (RJ45 port)
Off – Autowrap disable (RJ45 port)
On – Station and lobe application
Off – RI and RO application
1
2
3
4
Switch Configuration Table
(From back of card)
Notes: SW1 switchblock manages FOT-A.
SW2 switchblock manages FOT-B.
Individual switches on each
switchblock have the same
functionality.
Jumper P1 controls ring speed of
FOT-A.
Jumper P2 controls ring speed of
FOT-B.
SW2 (FOT-B or RO)
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QR.1.1 Selecting Port Configurations
Example A
Configuration Switch Settings Example
RJ45 port as a lobe
Fiber ST port as a station
(Default configuration)
1 – Off
2 – On
3 – Off
4 – On
A
RJ45 port as a station
Fiber ST port as a lobe
1 – Off
2 – Off
3 – Off
4 – On
B
RJ45 port as a RI
Fiber ST port as a RO
1 – On or Off
2 – Off
3 – On or Off
4 – Off
C
RJ45 port as a RO
Fiber ST port as a RI
1 – On or Off
2 – On
3 – On or Off
4 – Off
D
MCC-DFL
P
1
P
2
P1
P2
16 Mb
PWR
P1
P2
16 Mb
PWR
P
2
P
1
TX
TX
RX
RX
F
O
T
B
F
O
T
A
Phantom Current
Phantom Current
Fiber Key
Fiber Key
Concentrator
Station
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Example B
Example C
MCC-DFL
P
1
P
2
P1
P2
16 Mb
PWR
P1
P2
16 Mb
PWR
P
2
P
1
TX
TX
RX
RX
F
O
T
B
F
O
T
A
Fiber Key
Fiber Key
Phantom Current
Phantom Current
Concentrator
Station
MMAC
MCC-DFL
P
1
P
2
P1
P2
16 Mb
PWR
P1
P2
16 Mb
PWR
P
2
P
1
TX
TX
RX
RX
F
O
T
B
F
O
T
A
Ring Out To Ring In
Ring Out To Ring In
Ring Out To Ring In
Ring Out To Ring In
MMAC
MMAC
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Example D
QR.1.2 Selecting The Ring Speed(s)
The jumpers P1 and P2 are used to select the MCC-DFL’s ring(s) speed.
Use jumper P1 to set the ring speed of FOT-A, as shown in the table.
Use jumper P 2 to set the ring speed of FOT-B, as shown in the table.
Ring Speed of FOT-A Put Jumper P1 Sleeve Over
16 Mbps Pins 1 and 2 (Default setting)
4 Mbps Pins 2 and 3
Ring Speed of FOT-B Put Jumper P2 Sleeve Over
16 Mbps Pins 1 and 2 (Default setting)
4 Mbps Pins 2 and 3
MCC-DFL
P
1
P
2
P1
P2
16 Mb
PWR
P1
P2
16 Mb
PWR
P
2
P
1
TX
TX
RX
RX
F
O
T
B
F
O
T
A
Ring Out To Ring In
Ring Out To Ring In
Ring Out To Ring In
Ring Out To Ring In
MMAC
MMAC
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QR.1.3 Description Of Switches
Switch 1
You can set the type of fiber keying on RI/RO ports to connect to devices
using 802.5J fiber keying or devices using Cabletron fiber keying.
Switch 1 dictates the type of fiber keying; the setting depends on whether
the attached device is using Cabletron fiber keying or 802.5J fiber keying.
Set the switch as shown in the table.
Switch 2
This switch works in conjunction with Switch 4 to select the mode of
operation for the RJ45 port. Use Switch 4 to dictate whether the FOT will
act as a RI/RO device or station/lobe device. Once this has been done
Switch 2 determines the application of the RJ45 port. The fiber ST port
automatically configures to work with the RJ45 port. For example,
configuring the RJ45 port as a RI, automatically changes the fiber ST port
to a RO. Set Switch 2 as shown in the table.
NOTE
Cabletron Systems offers complete compatibility with vendor
products that comply with the “new” 802.5J standard for fiber
RI/RO ports. Therefore, the MCC-DFL offers connectivity to
products using 802.5J or Cabletron Systems fiber keying.
Keying Type for Fiber RI/RO ST Port * Set Switch 1 to Position
Connection to Cabletron compliant devices On
Connection to 802.5J compliant devices Off
*Applicable to RI/RO applications only – 802.5J fiber keying is always
used for station and lobe applications.
Mode of Operation for RJ-45 Port Set Switch 2 to Position
RO or lobe applications On
RI or station applications Off
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Switch 3
When the FOT is being used as a RI/RO device this switch enables or
disables the autowrap feature on the RJ45 port. It has no relevance to
station/lobe applications. The feature should be enabled to connect to
Cabletron devices or disabled to connect to non-Cabletron devices.
Set Switch 3 as shown in the table.
Switch 4
This switch selects the mode on the entire FOT. Use the switch to
configure it as a RI/RO device or a station/lobe device. Then use Switch 2
to establish the configuration of the RJ45 port; the fiber ST port
configures automatically. Set Switch 4 as shown in the table.
Autowrap on RJ45 RI/RO Port Set Switch 3 to Position
Connection to Cabletron devices On
Connection to non-Cabletron devices Off
Configure FOT Mode for Set Switch 4 to Position
RI/RO applications Off
Station/Lobe applications On
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QR.2 LED FUNCTIONS
Consult the diagram to help interpret LED indications.
MCC-DFL LEDs
PWR - Power
The
PWR
LED lights GREEN during normal operation, indicating the
reception of power. If the LED is off, the MCC-DFL is not receiving
power.
16 Mb - Ring Speed
Each FOT has a
16 Mb
LED. The LEDs lights YELLOW to indicate a
16 Mbps ring speed on the associated FOT. An unlit LED indicates a ring
speed of 4 Mbps on the associated FOT.
P1 And P2 - Ports
Each FOT has
P1
and
P2
LEDs to indicate the status of the associated
port.
On FOT-A, the
P1
LED indicates the status of the RJ45 port and the
P2
LED indicates the status of the fiber ST port.
MCC-DFL
P
1
P
2
P1
P2
16 Mb
PWR
P1
P2
16 Mb
PWR
P
2
P
1
TX
TX
RX
RX
F
O
T
B
F
O
T
A
P1
P216 Mb
PWR
P1
P2
PWR
16 Mb
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On FOT-B, the
P1
LED indicates the status of the fiber ST port and the
P2
LED indicates the status of the RJ45 port.
P1 And P2 LEDs For Station And Lobe Ports
The
P1
and
P2
LED indications vary slightly for fiber ST and RJ45 ports.
The table below describes the LED indications for ports configured as
lobe or station ports.
NOTE
The
P1
and
P2
LEDs act differently on FOTs configured for
station/lobe applications than they do for FOTs configured for
RI/RO applications.
Port LED Activity Meaning
RJ45
Lobe or
Station
GREEN Phantom current present (port inserted).
OFF No phantom current present (port wrapped).
Blinking RED
(Lobe port only)
Speed-fault condition caused the port to wrap.
Fiber
Lobe
GREEN Fiber key received (port inserted).
Blinking GREEN
The connection from the upstream device to
the Receive connection is complete but the
port is wrapped.
Blinking RED Speed-fault condition caused the port to wrap.
OFF Rx disconnected - signal loss.
Fiber
Station
GREEN Fiber key received (port inserted).
Blinking GREEN
The connection from the upstream device to
the Receive connection is complete but the
port is wrapped.
OFF Rx disconnected - signal loss.
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P1 And P2 LEDs For RI And RO Ports
The
P1
and
P2
LEDs indicate the status of the RI/RO ports as described
in the table.
Port LED Activity Meaning
RJ45
RI/RO
GREEN Active (port open)
Blinking GREEN Autowrap condition (port wrapped).
Blinking RED
Speed-fault condition caused the port to
wrap.
OFF No activity (port wrapped).
Fiber
RI/RO
GREEN Rx connected, fiber key received.
Blinking GREEN
The connection from the upstream device to
the Receive connection is complete but from
the Transmit connection to the downstream
device it is incomplete.
Blinking RED
Speed-fault condition caused the port to
wrap.
OFF No connection.
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