ONT activation and Troubleshooting based on service model

Content:+ ONT activation method with detail PLOAM message description follwed ITUT G988 standard+ OMCI Key components and detail explanation which detail describe in wireshark packets + GPON Service troubleshooting followed Viettel service model. So that find the issue come from GR part or OMCI part

ONT activation and Troubleshooting based on service model Reference: T-REC-G.984.3-01-2014.pdf https://drive.google.com/open?id=1M5mRztoTrqz6J1zXlVlH8RF3n5sDRwR4 T-REC-G.984.4-200802-I!!PDF-E.pdf https://drive.google.com/open?id=1MDUPbcx8o4rEoEDCbz2suNlUTpIDteeQ T-REC-G.988-10-2012.pdf https://drive.google.com/open?id=1MEEDFcEHA3XD6g941xjE4DVdOWuFB01p gpon trainning.pptx https://drive.google.com/open?id=1LnPstyLLFA2tqLPgCGPAy-QwBoqjdxtq ONT debugging tips http://wiki.dasannetworks.com/pages/viewpage.action?spaceKey=ECONET&title=Debugging+Tips © 2017 DASAN Zhone Solutions – Proprietary and Confidential ONT activation method GPON Element communication © 2017 DASAN Zhone Solutions – Proprietary and Confidential OMCC-OMCI channel establishmnet © 2017 DASAN Zhone Solutions – Proprietary and Confidential 10.2.5.1 Downstream PLOAM Message MT Name Function Upstream_Overhead Pre-assigned delay, the number of preamble bytes, ONU optical power Assign_ONU-ID Link a free ONU-ID with the serial number Ranging_Time equalization delay (in bits) Deactivate_ONU-ID instruct to stop sending upstream traffic and reset itself Disable_Serial_Number Disable / enable with this serial number Encrypted_Port-ID Indicate to ONUs which channels are encrypted or not Request_Password Request the password from an ONU in order to verify it Assign_Alloc-ID Instruct an ONU that the specified allocation ID is assigned to it No Message No message available when a PLOAM field is transmitted 10 POPUP POPUP state  Ranging State (O4) or Operation state (O5) 11 Request_Key Trigger ONU to generate a new encryption key and send it upstream 12 Configure_Port-ID Configure GEM Port for OMCI channel 13 Physical_Equipment_Error(PEE) Indicate to the ONUs that the OLT is unable to send both GEM frames and OMCC frames 14 Change_Power_Level The OLT triggers the ONU to either increase or decrease its transmitted power level 15 PST message To check the ONU-OLT connectivity in a survivable PON configuration, and to perform APS 16 BER Interval Accumulation interval per ONU for collecting bit errors 17 Key_Switching_Time The OLT indicates to the ONU when to begin using the new encryption key 18 Extended_Burst_Length Instruct the ONU the number of type preamble bytes to use in the upstream direction © 2017 DASAN Zhone Solutions – Proprietary and Confidential The “activation process” is performed under the control of the OLT by means of exchange of upstream and downstream PLOAM messages STEP1 The ONU entering the activation process listens to the downstream transmission and attains PSync and superframe synchronization Parameter Learning STEP2 The ONU waits for the Upstream_Overhead PLOAM message optionally followed by the Extended_Burst_Length PLAOM message periodically issued by the OLT STEP3 The ONU receives the PON operating parameters through the Upstream_Overhead and Extended_Burst_Length messages Serial Number Acquisition STEP4 The ONU announces its presence on the PON by responding to a broadcast Serial Number request periodically issued by the OLT with a Serial_Number_ONU message STEP5 The ONU adjusts its transmission optical power level using the absence of directed messages from the OLT as a negative acknowledgement © 2017 DASAN Zhone Solutions – Proprietary and Confidential Serial Number Acquisition STEP6 The OLT discovers the Serial Number of a newly connected ONU and assigns an ONU-ID to it using the Assign_ONU-ID message STEP7 The OLT issues a directed Serial Number request to a newly discovered ONU and accurately times the ONU’s response Ranging STEP8 The OLT computes the individual Equalization Delay and communicates this Equalization Delay to the ONU using the Ranging_Time message STEP9 The ONU adjusts the start of its Upstream GTC Frame clock based on its assigned Equalization Delay STEP10 The ONU completes activation and start regular operation © 2017 DASAN Zhone Solutions – Proprietary and Confidential 10.2.3 ONU state diagram © 2017 DASAN Zhone Solutions – Proprietary and Confidential I.1.4.1 Old ONU bring-up Once the ONU enters operation state O5 after activation, the OLT creates the OMCC as described in clause B.1 As described in clause I.1.3.1, the OLT then retrieves the ONU MIB data sync value by sending a get (ONU data (MIB data sync)) message to the ONU The OLT compares the received MIB data sync attribute value to the OLT's own MIB data sync value for that ONU The result of the comparison leads to three possible ONU bring-up scenarios:  If the ONU's MIB data sync value matches the OLT's value, and is not zero, the OLT may assume that their MIBs are in alignment The ONU bring-up process is complete NOTE – The OLT ultimately makes the choice between trusting MIB sync match – which is not a guarantee – and resynchronizing the MIBs in detail The OLT also has the choice to reset the MIB and rebuild it from scratch or to audit and repair it incrementally  If the ONU's MIB data sync value equals zero, possibly the result of an ONU software upgrade or because the ONU considers its MIB to be invalid, the OLT follows the bring-up sequence described for a new ONU  If the ONU's MIB data sync value does not match the OLT's value, the OLT executes the MIB synchronization process, as described in clause I.1.3.2 Once the OLT has provisioned the ONU's MIB, it must align MIB data sync values The OLT completes the bring-up process by sending a set (ONU data (MIB data sync)) command ... http://wiki.dasannetworks.com/pages/viewpage.action?spaceKey=ECONET&title=Debugging+Tips © 2017 DASAN Zhone Solutions – Proprietary and Confidential ONT activation method GPON Element communication © 2017 DASAN Zhone Solutions – Proprietary and Confidential OMCC-OMCI channel... Proprietary and Confidential 10.2.3 ONU state diagram © 2017 DASAN Zhone Solutions – Proprietary and Confidential I.1.4.1 Old ONU bring-up Once the ONU enters operation state O5 after activation, the... DASAN Zhone Solutions – Proprietary and Confidential 18 Management Entity Relationships Attributes Actions Notifications © 2017 DASAN Zhone Solutions – Proprietary and Confidential 19 Relationships