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Replace an Ethernet Switch Unit (ESU1 or ESU2)

Laser Safety

Warning Laser Radiation Icon Warning 1! Personnel handling fiber optic cables must be trained for laser safety.   
Warning Laser Radiation Icon Warning 2! 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.

Warning Caution 1: Fiber optic cable installation and maintenance should only be performed by trained service personnel.   
Warning Caution 2:  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.

Danger  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 the time of installation or replacement. To equalize the static charge on the plug-in, establish a body path to the ground using an ESD wrist strap connected to an 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 in the nonconductive areas
  • Place static-sensitive cards into an antistatic plastic bag    
  • Use protective ESD-sensitive packing and shipping bags when returning repairable components

Procedure

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

 The following materials are required to complete this procedure:

 

  • Ethernet Switch Unit (ESU) version 11 or 2
  • A personal computer (PC) with serial communication software, i.e. HyperTerminal, installed on a laptop computer.
  • Serial cable with DB-9 connectors.
  • Work order, with Ethernet Switch Unit (ESU) provisioning parameters.

 Use the following procedure to replace the Ethernet Switch Unit (ESU11): 

  1. If not already open, open the cover of the Tellabs 1150 MDS5 OLT (see Figure 1).
Figure 1: Tellabs 1150 MDS5
 
  1. Locate the failed ESU (ESU A or ESU B).
  2. Remove and cap the Gigabit Ethernet (GigE) fibers from the Small Form-Factor Pluggable (SFP) module(s) in the ESU.
  3. Lower the locking bail on the SFP module(s) and remove all SFP modules from the ESU.
  4. Rotate the upper and lower card ejectors to eject the ESU from the backplane.
  5. Remove the failed ESU from the MDS5 and place in an ESD protective package. 
  6. Unpack and inspect the replacement ESU for any apparent damage (see Figure below).
Figure 2: Ethernet Switching Unit (ESU11)  

  1. Carefully insert the card into the upper and lower card guides until the card contacts the backplane connector. Then apply equal pressure on both upper and lower ejectors.
  2. Upon insertion, the STAT LED illuminates RED while performing internal power-up diagnostics. Upon successful completion of the power-up diagnostics, the STAT LED blinks GREEN at a 0.5 second interval while initializing. Upon completion of initialization, the STAT LED illuminates solid GREEN.
  3. Does the STAT LED illuminate as indicated in Step 9?
    • If YES, go to Step 11.
    • If NO, replace the ESU with a known good unit and repeat this procedure from Step 7. If the problem persists, contact the next level of support for technical assistance. 
  4. On the Windows desktop, select Start > Programs > Accessories >Communications > HyperTerminal.
  5. Close the default Connection Description dialog.
  6. In the Open dialog, select the session file (esu.ht), and click Open.
  7. Is a HyperTerminal session esu.ht listed?
    • If YES, go to Step 19.
    • If NO, go to Step 15.
  8. In the HyperTerminal window, select File > New Connection. The New Connection dialog is displayed.
  9. In the New Connection dialog, type esu.ht. Click OK. The Connect To dialog is displayed.
  10. In the Connect To dialog, select the Connect using: pull-down. In the pull-down list select COM1. Click OK. The COM1 Properties dialog is displayed.
  11. In the COM1 Properties dialog, select each of the pull-downs and set the following options:
    • Bits per second - 38400
    • Data bits: - 8
    • Parity: - None
    • Stop bits: - 1
    • Flow control: - None
  • After entering options, Click OK. 
  1. Connect a serial cable from the COM1 I/O port (DB9) on the computer to the RS232 DB9 port on the ESU card. When the connection is established, the following prompt is displayed: 
    MontaVista(R) Linux(R) Professional Edition 3.1 
Linux/ppc 2.4.20_mvl31-ESU_KERNEL_V000011.

username: _ .
    Information Note: At the ESU serial port, the user account must have administrative privileges to perform this procedure. The only exception to this rule occurs when an ESU is booted with no SFP modules in the faceplate SFP slots, as described below:
  • When an ESU is booted with no SFP modules, the system enables the craft account (password is adsl2+) and allows the craft account to execute the ERASEDB procedure.
  • This exception provides the ability to erase and turnup a previously used ESU when the previous local user accounts/passwords are not known.
    Information Note: At the ESU serial port, the user account must have administrative privileges to perform this procedure. The only exception to this rule occurs when an ESU is booted with no SFP modules in the faceplate SFP slots, as described below:
  1. At the username: prompt, input craft, and press Enter. 
  1. At the password: prompt, input adsl2+, and press Enter. The Craft Menu is displayed.
    Information Note: The password is not echoed on the screen 
    Craft Menu

1) Alarms                       -> Show all alarms
2) Ethernet Phy Maintenance     -> Counters and Status
3) Inventory                    -> HW/SW inventory
4) Multicast Maintenance        -> Counters, Status, RTP
5) Network Utilities            -> Ping, connect, NTP, Whereami
6) Optical Maintenance          -> SFP/Optical Inventory Status
7) Turnup Maintenance           -> Turnup Config
8) VLAN Maintenance             -> VLAN Info
9) PM                           -> View PM Error Log Counts
10) Security                    -> Security and User Administration
x) Logoff                       -> Logoff this session
z) Exit                         -> Return to Command Prompt
selection = _
  1. From the Craft Menu, input 7, and press Enter.  The Turnup Maintenance Menu is displayed. 
    Turnup Maintenance Menu

1) SHOWTURNUP    -> Show current config
2) TURNUP        -> Set Turnup config, service affecting
3) ERASEDB       -> Return NE to factory defaults
x) Logoff        -> Logoff this session
z) Exit          -> Return to the Upper Menu

selection = _

 

  1. From the Turnup Maintenance Menu, input 3, and press Enter. The following prompt is displayed: 
    ERASEDB will ERASE all data in the NE database and return to initial factory default
settings. ERASEDB will be SERVICE AFFECTING to ALL LINES within the NE.
NE needs to be DELETED and RE-ADDED from EMS.
Do you also wish to erase the User Database? (Y/N) [N]:_
Do you also wish to erase the SSL certificates? (Y/N) [N]:_
    Information Note: When the user database is erased, the factory default user accounts and passwords (i.e., admin/tellabs and craft/adsl2+) are restored on the ESU
  1. Type Y to erase the user database and SSL certificates, then press Enter.  The following prompt is displayed: 
    Do  you  also  wish  to  erase  the  Turnup  Settings  (Y/N)  [N]:_
    Information Note: When the turnup settings are erased, the ESU must be reconfigured by logging in at the ESU serial port.
  1. Type Y to erase the turnup settings, and press ENTER. The following prompt is displayed: 
    Are you sure you wish to continue (Y/N) [N]:_
  2. Type Y, and press Enter.  to proceed with erasing the ESU database.
  3. Uncap and clean, according to local practices, the Gigabit Ethernet (GigE) fiber jumpers are removed in Step 3 and re-insert the LC connector into the SFP module installed in Step 28.
    Information Note 1: When inserting fibers into the SFP module, the transmit side is the top port and the receive side is the bottom port.
    Information Note 2: The LC connector on the fiber jumper locks into the SFP module, similar to an RJ-45 connector. When the connector is properly inserted, an audible click can be heard.
  1. Does the SFP LOW LED illuminate Dark (indicating a good signal) and the LINK LED illuminate Green (link is up)?
  • If YES, STOP. YOU HAVE COMPLETED THIS PROCEDURE.
  • If NO, replace the ESU with a known good unit or contact the next level of support for technical assistance.



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