Installing the Chassis

Step 2   Remove the two screws from the blank filler module. Remove the blank filler panels.

Step 3   Take the new module from the shipping container and use canned, dry, oil-free, compressed air to blow off any possible dust particles.

Step 6   Reset the NEMI modules (both master and slave, if applicable) by inserting a pointed tool into the small hole on the front panel within the first 30 seconds of installation. The green power LED comes on and the NEMI module starts up.

Step 7   Save the blank filler panels with the packaging material.

Step 2   Remove the two screws from the blank filler module. Remove the blank filler panel.

Step 3   Take the new module from the shipping container and use canned, dry, oil-free, compressed air to blow off any possible dust particles.

Step 4   Insert the DEMI module carefully into the chassis slot while guiding the upper and lower edges of the module in the tracks until its connectors come into contact with the backplane connectors.

Caution   It is critical to insert the module gently. If you need a force greater than 1 lb (4.5 newton) to push in the module, stop immediately. Inspect the electrical connector. If the connector is not damaged, repeat Step 4.

Step 5   Hold the module in position after making full contact and use the two screws on the front panel of the module to secure it in the housing. When the module is in contact with the backplane, the green power LED is on.

Step 6   Save the blank filler panels with the packaging material.

When the power is on, all of the green power supply LEDs should be on for each power supply module (PSM) and wavelength channel module (WCM). The display panel provides important system information.

Warning The plug-socket combination must be accessible at all times because it serves as the main disconnecting device.

Warning This unit might have more than one power cord. To reduce the risk of electric shock, disconnect the two power supply cords before servicing the unit.

Caution   Please use approved extension cords or a power circuit breaker to allow front power access.

Step 2   Connect the ends of the power supply cords to the main power supply source.

The keyswitch is secured against rotation. The key can be removed in either the ( 0 ) or ( | ) position. A pair of keys for powering up is supplied with each system.

Warm up the unit for 30 minutes before testing the laser power or connecting applications.

Caution   If powered down, wait at least 10 seconds before you switch the unit on again.

To connect the power cables for the US version, follow these steps:

Step 4   Connect the three wires on the other end to the corresponding high current connectors of the power distribution unit. Attach the wires to their respective points in the connectors.

Caution   Make sure that the three wires of the power cables are correctly fixed at the clamps of the PDU connectors.

Caution   Never connect blue (negative) or brown (positive) wires to the ground pin.

Step 5   Turn the power on using the corresponding power switch of the PDU.

The chassis powers up as soon as the corresponding power switch of the PDU is turned on.

Caution   Tighten the screw of the plug to avoid loss of connection.

Step 2   Choose the appropriate power cable.

Step 4   Attach the three wires to their respective points in the corresponding connectors of the PDU as described as follows:

Caution   Make sure that the three wires on the power cables are correctly fixed at the terminal clamps of the unit and at the connectors of the PDU.

Warning This warning applies only to units equipped with DC input power supplies. Wire the DC power supply using the appropriate lugs at the wiring end. The proper wiring sequence is ground to ground, positive to positive (line to L), and negative to negative (neutral to N). Note that the ground wire should always be connected first and disconnected last.

Step 5   Turn the power on using the corresponding power switch of the PDU.

The chassis powers up as soon as the corresponding power switch of the PDU is turned on. If the DC power cables are not connected to the PDU, the plug socket combinations on the rear end of the unit serve as switches.

Use the following fuses:

Caution   Always replace blown fuses with fuses of the same type and size.

Caution   Do not use damaged terminal blocks. Immediately replace damaged or defective terminal blocks.

Note   The 115/230V version automatically detects the input voltage. No further adjustment is necessary.

The Cisco Metro 1500 series system supports the following power sources:

To ground the chassis, follow these steps:

Step 2   Connect the other end of the wire to the rack.

• Do not touch the safety lattice of the airflow system while fans are operating.

• Do not use wet tissues for cleaning the product's outer housing.

• Do not use any harsh or abrasive cleaning agents.

Fiber optic cable connectors can be damaged by improper cleaning and connection procedures. Dirty or damaged fiber optic connectors can result in not repeatable or inaccurate communication.

Fiber optic connectors differ from electrical or microwave connectors. In a fiber optic system, light is transmitted through an extremely small fiber core. Because fiber cores are often 62.5 microns or less in diameter, and dust particles range from a tenth of a micron to several microns in diameter, dust and any contamination at the end of the fiber core can degrade the performance of the connector interface where the two cores meet. Therefore, the connector must be precisely aligned and the connector interface must be absolutely free of trapped foreign material.

Connector, or insertion, loss is a critical performance characteristic of a fiber optic connector. Return loss is also an important factor. It specifies the amount of reflected light; the lower the reflection the better the connection. The best physical contact connectors have return losses better than -40 dB, although -20 to -30 dB is more common.

The connection quality depends on two factors; the type of connector and the proper cleaning and connection techniques.Dirty fiber connectors are a common source of light loss. Keep the connectors clean at all times and keep the dust cover installed when not in use.

Before installing any type of cable or connector, use a lint-free alcohol pad from a cleaning kit to clean the ferrule, the protective white tube around the fiber, and the end-face surface of the fiber.

As a general rule, whenever there is a significant, unexplained loss of light, clean the connectors.

Caution   Use extreme care when removing or installing connectors so you do not damage the connector housing or scratch the end-face surface of the fiber. Always install protective covers on unused or disconnected components to prevent contamination. Always clean fiber connectors before installing them.

Use a swab saturated with isopropyl alcohol to clean the end-surfaces. Use dry, oil-free compressed air after applying the isopropyl alcohol.

To clean the optical connectors, follow these steps:

Step 2   Blow dry the connectors with canned, dry, oil-free, compressed air.

Step 3   Use a magnifying glass to inspect the ferrule.

• Clean the connectors using lens tissues before connecting to the adapters. Use pure alcohol to remove soil.

• Do not clean the inside of the connector adapters.

• Do not use force or quick movements when connecting the fiber optic connectors in the adapters.

• Cover the connector adapters to avoid soiling or contaminating the inside of the adapters while cleaning the chassis.

• Cover the connectors and adapters to avoid the inside of the adapters or the surface of the connectors from getting dirty when not using the connectors.

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  Note   If the surface is not clean or does not have a uniform shine, repeat the process using a fresh surface of the alcohol pad.

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Step 2   Pull out the malfunctioning module.

Step 3   Slide in the spare module.

Step 4   Check that the green LED is on.

Step 5   Reconnect the power cord.

Step 6   Tighten the four panel screws.

Online testing varies from site to site depending on the CPU, operating systems in use, and the local channels being connected.

Be sure to set up and run your test jobs before installing the unit. Test jobs must be set up and verified by the customer prior to the actual installation of the system. For test purposes, you can force the laser on by means of the network management system as described in the Cisco Metro 1500 Series Software Configuration Guide.

Note   If your test results of the remote link deviate from the results described in these steps and you cannot correct the problem, contact your service representative.

Budget measurements should be carried out at points A and F to check whether the user equipment is correctly interfaced. The budget measurement at point A should be within the range specified on the Cisco Metro 1500 series label. Measurement at point E is required to check whether the attenuation over the long distance is within the power budget. Budget measurements at point C and point D, measured at the remote side, can be used to calculate loss-levels of the connecting fiber line. All channel modules leaving the factory are accompanied by a test report.

Note   All power measurements must be done in-line because of ALS.

All measurements concerning budgets need modulated light. We recommend using an external modulated light source. Practically any low powered light source with roughly 100 MHz modulation can be used. If a need for an approved light source exists, contact your Cisco representative.

You need:

• A Cisco Metro 1500 series system

• Access to two Cisco Metro 1500 series systems under test already connected through optical fibers and RSMs (or fiber spools) depending on system configuration

• A short fiber jumper

• Access to ocmstate

• An optical power meter connected in-line through an optical coupler or an optical in-line power meter

If you have an external 100-MHz modulated light source, follow Steps 1 to 3 to measure channel output at point F:

Step 2   Connect the light source output to the connector labeled L/R (local receiver) of the local channel module. As a result, the green LED of the local receiver of the channel module is on and the ALS starts working (every 10 seconds the LED for remote transmitting blinks shortly). However, the signal does not get looped
back yet.

Step 3   Use the ocmstate command to switch on the local loop. Now you can measure the output power at point F. Afterwards, switch off the local loop. To measure at points B or C, follow Steps 1 and 2 and then Step 4:

Step 4   Use the ocmstate command to switch the remote laser to "forced ON" to overcome ALS. Then measure at points B and C. If you want to measure the input at points D or E, follow Steps 1, 2, and 3 and then Step 5.

Step 5   Use ocmstate to activate the remote loopback on the remote side of the link.

The link comes up. All lasers and receivers at the channel module are on and the remote receiver and the remote transmitter at the channel module on the remote side of the link are on. The local transmitter at the channel module at the remote side of the link is also on to allow measurements.

In case you do not have an adequate external modulated light source, you can use the modulated light (100 MHz) of the pilot laser of the Cisco Metro 1500 series system's RSM (only an option if your Cisco Metro 1500 series system is equipped with an RSM). In this case, in Step 2 you connect the local RSMs B/R (output of the pilot laser) to the connector labeled L/R (local receiver) of the channel module. The output of the pilot laser is sent against traffic.

Note   Do not forget to set or enable clocks, disable loopback and enable automatic mode for the RSM before putting the Cisco Metro 1500 series units into service.