Hands-On Nokia (Siemens) EWSD Switch Advanced Support Course

Course Description

The Nokia (formerly Siemens) EWSD Switching Support Course was created to help telco personnel continue to support the EWSD switching system with less reliance on vendor support options.

Intended as a follow-up to the EWSD Maintenance and Operations course, the support course will move personnel with a good working knowledge of the EWSD to the next level, providing them with both the knowledge and confidence to work on important parts of the switch for which they are less familiar. The course begins with a review of the system topology, ensuring a consistent understanding of the different LTG and DLU types, and remotes. The discussion then turns to the front end, with detailed descriptions of the Coordination Processors IOP Groups, its various processors, Common and Local Memory, plus various interfaces including X.25, serial, SCSI, etc. Significant detail is placed on the different SN network types, including DE345, and their various TimeSpace stage sub-configurations. An emphasis is placed upon the configuration for the local switch system that students work on.

DISP and SRCHALARM commands, plus MMN, FLM and Mask information within the system output messages, are all used to locate as much information about a fault as possible. A large number of past examples are used as practice, but any actual faults in the switch will also be analyzed carefully for the best course of troubleshooting. Predictions are made for the card modules that are most suspect. These results are then compared to the actual fixes performed from the past examples, and also to current maintenance-window diagnostic results, if applicable. Module replacement precautions and procedures are discussed in detail, including communication between COT personnel and the NOCSCC or other Tier-3 support.

Books such as the Exchange Configuration Document (ECD) and Cable Laying List (CLL) will be consulted to see how to find suspect cables and their part numbers, including their exact location on the backplane.

Students Will Learn

Detailed System Overview of all primary modules and peripherals
MML commands including both routine and specialized options
How to debug the system with various output messages like MMN FLN
Understand troubleshooting docs like TAPs and TLMs
Use Cable Laying List documents to understand module interconnections
Review all alarm categories on the SYPD, and use SRCHALARM
Understanding LTG DLU troubleshooting and loading
Locating modules on the front or backplanes
Troubleshooting on central control equipment like the CP, SN, CCNC and CCG
Understand Recovery levels and use of the EAI
And much more...

Target Audience

Technical staff such as NOCSCC personnel, plus certain Central Office Technicians and management will find the course very useful in responding to multiple types of switch alarms. Those seeking cross-training or system interoperability can also benefit from the course.

Prerequisites

The course is an accelerated version of a traditional support course. Students are recommended to have previously taken the EWSD Maintenance Troubleshooting course, or have a good working background of the EWSD switch and its MML commands.

Course Outline

Module 1 :   EWSD® System Overview
        - System Hardware Components:
            CP incl. various IOPs, MB, MDD/MOD, etc.
            CCNC incl. SS7
            SN incl. DE3/4/5 types
            Time & Space Stages
            LTG incl. LTGC, LTGK, LTGO
            DIU Types
            DLU incl. different DLU semi-shelf types
            RCU, SmartRemote
            DCO OneUp™ Option
            SLC-96®
            GR-303 Interfaces
            IPH & ISDN options
        - TDM and PCM Review
        - Functional Block Diagram (Tier 2)
        - Call Processing Example

Module 2 :   BMML & IO
        - SmartCommander, OMT, EAI, SYPD
        - Common MML Commands - CONF, DISP, STAT, LIST, etc.
        - SRCHALARM, DISPINDIC
        - DIAG vs. TEST
        - System Output Messages:
            MMN
            FLN
            Mask
            Register Data
            Module Listings
        - CR & CANC Overview
        - Review

Module 3 :   System Message Analysis
        - Electronic Document Delivery System (EDDS)
        - MMN Decoding
        - FLN Decoding
        - MMN/FLN Examples
        - Hexadecimal, Decimal, and Binary
        - Register Decoding
        - Register Examples
        - Diagnostic Response Messages
        - System Reports
        - Exercises

Module 4 :   General Hardware
        - Documentation Types:
            EDDS - .chm, Corrective Maintenance Practices: TLM, TAP, DLP
            Book 0905 - Exchange Configuration Documents (ECD)
            Cable Running/Laying List (CRL/CLL)
            Book 1088 - Maintenance Summary Guide
            Book 0825 - Installation and Acceptance
            Job Engineering Docs
        - Siemens Packaging - SIPAC, SIVAPAC incl. backplane pinouts
        - Determining Suspect Modules
        - Locating Modules - Bay, Frame, MUT, MOLOC
        - Changing Modules:
            NOC-CO Interaction
            Verify the Fault
            Precautions, ESD, VCC
            OST States
            Test & Contingency Plans
            Module Extraction/Seating
            Verify the Repair
            Clearing Alarms
        - Module Practice Exercises
        - Examples
        - Review

Module 5 :   Line Trunk Group (LTG) & Digital Line Unit (DLU)
        - LTG/DLU Types: Which Do You Have?
            LTGC/LTGK/LTGO
            DLUA/DLUB incl. Shelf Types - DLU(x)
            Group Switch Versions
            DIU vs. LDIE
            Speech Highways & CAS
            SDCK interfaces
        - Procedures:
            Using the Correct TLM/TAP
            Finding the BMML Commands
            Locating the Module/Power Zones
            Replacing the Module
            Verify the Repair
        - Locating Cables
        - Examples & Practice


Module 6 :   Switching Network (SN)
        - SN Types: Which Do You Have?
            DE3
            DE4
            DE51/52/54
            TSM, SSM
Procedures:
            Using the Correct TLM/TAP
            Finding the BMML Commands
            Locating the Module/Power Zones
            Replacing the Module
            Verify the Repair
Locating Cables
        - Examples & Practice

Module 7 :   Coordination Processor (CP)
        - CP Types: Which Do You Have?
            CP Components
            CP113C
            CP113D
            CP113CR
            BAP
        - Memory Types
            LMY, CMY
        - CCNC
            SS7 A Links
        - Central Clock Generator (CCG)
            Disturbed, Synchronization Levels
        - Message Buffer (MB)
        - MDD, MOD
        - IO Connections
            EAI, SYPD, OMT, SmartCommander
        - Procedures:
            Using the Correct TLM/TAP
            Finding the BMML Commands
            Locating the Module/Power Zones/Groups/MB Assignment
            Replacing the Module
            Verify the Repair
        - Examples & Practice

Module 8 :   Recovery
        - EAI & SYPD
        - RECOV Types:
            New Start (NSTART) Action Group 0 - 3
            Initial Start (ISTART) Action Group 1 - 2G
            NSTART vs. ISTART
        - Recovery Precautions & Warnings
        - Examples

Module 9 :   Optional Topics
        - Specific to the local system and student requests
        - Switch hardware cross-connects
        - Topics include RCU, SmartRemote RSU, and SLC-96® remotes
        - Remote HTI/RTI DIUs
        - APS Release Docs, Patch Application Procedures
        - Peripheral Equipment including Cognitronics & ETC-1000 announcers, Dantel, etc.

Delivery Method

Instructor-Led with numerous exercises throughout.

Equipment Requirements
(This apply's to our hands-on courses only)

BTS provides materials for a very successful Hands-On course, but encourages students to bring their own equipment to the course. This provides an ideal opportunity to incorporate their own gear and resources into the labs, gaining valuable experience with their specific equipment.

BTS always provides equipment to have a very successful Hands-On course. BTS also encourages all attendees to bring their own equipment to the course. This will provide attendees the opportunity to incorporate their own gear into the labs and gain valuable training using their specific equipment.

Course Length

5 Days