Replace Laser (SFP/XFP) Module

Laser Safety

Warning! Personnel handling fiber optic cables must be trained for laser safety.

Warning! Optical Fibers emit invisible laser radiation. Avoid direct exposure to the beam. Never look into the end of a Fiber or into a Fiber connector on a cable or a device. Permanent eye damage or blindness can occur quickly from laser radiation.

Fiber Optic Cable

Ensure that the fiber connectors are properly cleaned per local standards. Dirty connectors may result in inaccurate measurements.

Caution: Fiber optic cable installation and maintenance should only be performed by trained service personnel.

Caution:  Do not bend the fiber optic cable to a diameter smaller than 7.5cm/3 inches. Doing so may damage the fiber or prevent the signal from passing through properly.

Electrostatic Discharge (ESD)

Observe and follow all ESD instructions while handling Tellabs plug-in equipment.

Caution! The Tellabs plug-in equipment uses semiconductor devices that can be damaged by electrostatic discharge (ESD). Do not remove a plug-in from a protective packing box or equipment rack until time of installation or replacement. To equalize the static charge on the plug-in, establish a body path to ground using an ESD wrist strap connected to a ESD ground. If storing or shipping the plug-in becomes necessary, place the plug-in in a conductive shipping box to prevent static buildup.]

Apply the following precautions:

• Use grounded wrist straps, table mats, floor mats
• Handle static-sensitive devices by the nonconductive areas
• Place static-sensitive cards into an antistatic plastic bag
• Use protective ESD-sensitive packing and shipping bags, when returning repairable components

Use the following procedure to replace an ESU2.

1. If not already open, open the cover of the Tellabs 1150 (MDS5 or MDS7) or Tellabs 1134 shelf.
2. Locate the failed SFP or XFP module (see Figure below).

SFP and XFP Module


 

3. Remove and cap the fiber optic cable(s) from the suspect module, noting the position of each fiber to ensure replaced the proper cable to the proper module port.
4. Lower the locking bail on the suspect module and remove the module from the ESU and set aside.
5. Replace the suspect module removed in Step 4 with a functional equivalent module. 
6. Re-install the fiber jumpers removed in Step 3.

   Note 1: When inserting fibers into the module, the transmit side is the top port and the receive side is the bottom port.

   Note 2: When the fiber optic connectors are properly inserted, an audible click can be heard.

7. Does the LOW LED not illuminate (indicating a good signal) and the LINK LED il-luminate Green (link is up)?
   • If YES, STOP. YOU HAVE COMPLETED THIS PROCEDURE.
   • If NO, repeat the above procedure with another module or contact the next level of support for technical assistance. Refer to Contacting Technical Support.