Cabletron Systems MCC-CRIO Manuale utente

QR-1

MCC-CRIO QUICK REFERENCE

QR.1 SETTING SWITCHES AND JUMPERS

Location of SW1 Switchblock And Jumper P1

(Default Settings)



Printed in the United States of America

Order Number: 9032130-01 July, 1997

The Complete Networking Solut

ion

SW1 Settings

On – Enable RI port

Off – Disable RI port

On – Enable RO port

Off – Disable RO port

On – Enable autowrap on RI

Off – Disable autowrap on RI

On – Enable autowrap on RO

Off – Disable autowrap on RO

4(for connection to Cabletron devices)

(for use with other vendor devices)

(for connection to Cabletron devices)

(for use with other vendor devices)

Switch Conﬁguration Table

SW1

1234

SW1

1234

OFF

QR-2

QR.1.1 SelectingThe Ring Speed

Use jumper P1 to select the MCC-CRIO ring speed.

QR.1.2 Setting Port Conﬁgurations

The RI/RO ports have an autowrap capability (transmit phantom current)

to close the ring, when:

• A cable is cut

• A cable fails

• A cable is not attached to a port

The

autowrap capability

is set at the factory (default conﬁguration) to allow the

connection of Cabletron devices to the RI/RO ports.

You must disable autowrap to connect the RI/RO ports to the devices of

other vendors.

Ring Speed Setting Put Jumper P1 Sleeve Over

16 Mbps Pins 1 and 2 (Default setting)

4 Mbps Pins 2 and 3

NOTE

Autowrap must be enabled at both ends of the cable.Ensure

that the Cabletron device at the other end has autowrap

enabled.

CAUTION

If autowrap is disabled, a beaconing condition may occur

before a cable can be attached.To avoid this condition connect

the cable before you insert the MCC-CRIO into the MCC-16, or

perform the connection with the MCC-16 shut off.

QR-3

QR.2 LED FUNCTIONS

Consult the diagram to help interpret LED indications.

MCC-CRIO LEDs

PWR - Power

The

PWR

LED remains lighted GREEN during normal operation,

indicating the reception of power. If the LED is off, the MCC-CRIO is not

receiving power.

Conﬁguration Switch Settings

Connect the RI of the

MCC-CRIO to the RO of a

Cabletron device.

1 – On (Default setting)

3 – On (Default setting)

Connect the RO of the

MCC-CRIO to the RI of a

Cabletron device.

2 – On (Default setting)

4 – On (Default setting)

Connect the RI of the

MCC-CRIO to the RO of another

vendor device.

1 – On

3 – Off

Connect the RO of the

MCC-CRIO to the RI of another

vendor device.

2 – On

4 – Off

MCC-CRIO

RI16 Mb

PWR

RI16 Mb

PWR

QR-4

16 Mb - Ring Speed

The

16 Mb

LED lightsYELLOW to indicate a 16 Mbps ring speed. An

unlit LED indicates a ring speed of 4 Mbps.

P1 and P2 - Ports

The

and

LEDs indicate the status of the associated lobe port, as

described in the table below.

RI And RO - Ports

The

and

LEDs indicate the status of the RI or RO port, as

described in the table below.

LED Activity Meaning

GREEN Phantom current present (port inserted).

OFF No phantom current present (port wrapped).

Blinking RED Speed-fault condition caused the port to wrap.

LED Activity Meaning

GREEN Active (port open).

Blinking

GREEN Autowrap condition (port wrapped).

OFF No activity (port wrapped).

Blinking RED Speed-fault condition caused port to wrap.

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