GL's CDMA analyzer is used to analyze and view protocols across A (A1), Ater (A3, A7), Aquinter (A9), & Aquater (A11) signaling interfaces. GL Communications supports the following types of CDMA analyzers:

• Real-time CDMA Analyzer (Pre-requisites: GL's field proven E1 or T1 internal cards or USB Laptop E1 or T1 external units, required licenses and Windows 2000/XP Operating System)
• Offline CDMA Analyzers (Pre-requisites: Hardware dongle and Windows 2000/XP Operating System)

Main Features

• Supports decoding of Ethernet-based protocols (across Aquinter and Aquater interfaces), ATM based protocols (across Ater interface), & HDLC based protocols (across A interface).
• Allows customized filtering/searching of the captured data (real-time/offline) by setting various parameters such as VPI/VCI, Payload Type, MAC layer address, Frame length, IP address, Port number and so on based on the interfaces chosen.
• Provides three default views i.e. Summary View, Detail View and Hex dump
• Summary View displays Device Number, Time Slots:, SubChannels, Frame Number, Time, Frame Length and so on.
• Detailed view displays easy to understand decodes of user selected frame
• Hex dump view displays the frame information in HEX and ASCII format
• Statistics view displays statistics based on frame count, byte count, frames/sec, bytes/sec and so on for the entire capture data.
• Call Trace display for called/ calling number, released calls, call status, & more.
• Capability to export summary as well as detail information to an ASCII file for subsequent import into a database or spreadsheet.
• Ability to configure the .ini file to get the proper decoding of protocols across A3 A7 interface.
• Remote monitoring capability using GL's Network Surveillance System

Additional feature supported by Real-time CDMA Analyzer

• Supports capturing and decoding of Ethernet-based protocols (across Aquinter and Aquater or A9 A11 interfaces), ATM based protocols (across Ater or A3 A7 interfaces), & HDLC based protocols (across A or A1 interface).
• Multiple streams of CDMA traffic on various T1/E1 channels can be simultaneously decoded with different GUI instances
• For A3 A7 interfaces,
  • Captures, decodes, filters, and reassembles (with or without Inverse Multiplexing option) AAL-2 and AAL-5 frames in real-time, from within the ATM cells according to user defined VPI/VCI
  • ATM raw data capturing requires user to specify timeslots, bit inversion, octet bit reversion, user/network side, ATM mapping, scrambling, and inverse multiplexing options
  • Streams may be captured on the selected time slots (contiguous or non-contiguous) and on full bandwidth
  • Unscrambling of ATM cells based on SDH X^43 + 1 algorithm
• For A1,
  • Frames captured can be filtered real-time based on length of frames (FISSU – Length as 5 and LSSU – Length as 7) can be set
  • Data transmission rate starting from 8kbps to N*64kbps is supported
  • Timeslots selection can be contiguous or non -– contiguous
• For A9 and A11,
  • Frames captured can be filtered real-time based on Source IP address, Destination IP address, Mac Layer Address, Source/Destination port no etc can be applied.

Additional features supported by Offline CDMA Analyzer:

• Trace files for analysis can be loaded through simple command-line arguments
• Multiple trace files can be loaded simultaneously with different GUI instances for offline analysis

Supported Protocols

• IOS* Application for A1 (3GPP2 A.S0014-A, Version 2.0.1, Date: July 2003)
  
  A1 interface carries signaling information between the Call Control (CC) and Mobility Management (MM) functions of the MSC and the call control component of the BS* (BSC) and the specified IOS application describes about the functional capabilities, including services and features, across the A1 interface. GL's CDMA A1 interface supports:
  
  • A1 Interface (ITU-T Standard Interfaces)
  • A1 Interface (ANSI)



• IOS* Application for A3 and A7(3GPP2 A.S0015-C, Version 1,0 Date: February2005)
  
  The A7 interface carries signaling information between a source Base Station(BS)* and a target Base Station. The specified IOS application describes about inter-BS* soft handoff procedures. The A3 interface carries coded user information (voice/data) and signaling information between the source BS* Selection/Distribution Unit(SDU) function and the channel element component (BTS) of the target BS*. These interfaces are provided using ATM cells over T1/E1 and SONET transmission links.



• IOS* Application for A9 and A11 (3GPP2 A.S0016-C, Version 1,0 Date: February 2005 & 3GPP2 A.S0017-A, Version 2.0.1, Date: July 2003):
  
  The A9 interface carries signaling information between the BSC and the PCF and where as A11 interface carries signaling information between PCF and PDSN. They are used for establishing link for transfer of user traffic.

*Inter-Operability Specification

*Base Station (BS) is an entity in the public radio telecommunications system used for radio telecommunications with mobile stations; Base Transceiver Station (BTS) is a channel element component of a base station that includes radio equipment, while, Base Station Controller (BSC) is the control portion of the base station that includes call control logic and interconnections to the MSC.

Summary, Detail and Hexdump Views

The CDMA analyzer application is invoked from the main menu of GL's T1/E1 Analyzer for real-time analyzer. The offline CDMA analyzer is invoked from the installation directory of the offline CDMA Analyzer. The analyzer displays summary, detail, call trace, statistics and hex dump view in different panes. The summary pane displays various information such as Frame Number, Time, Length, Message Types, IP source and destination addresses and so on. User can select a frame in summary view to analyze and decode each frame in the detail view. The Hex dump view displays the frame information in HEX and ASCII octet dump format.

Screen Shot of Summary, Detail and Hexdump Views

Real-time and Offline Analysis

Users can capture and analyze CDMA frames using real-time analyzer and record all or filtered traffic into a trace file The recorded trace file can then be analyzed offline and exported to ASCII file, or printed. CDMA raw data capturing requires user to specify timeslots, bit inversion, octet bit reversion, user/network side, , and data transmission rate options. In case of A3, A7, additional options such as ATM Mapping, scrambling, and inverse multiplexing can be applied.

Screen Shot of Timeslot selection

Filtering and Search

Users can record all or filtered traffic into a trace file. Filtering and search capability adds a powerful dimension to the CDMA analyzer. This feature can isolate required frames from all the captured frames in real-time/offline. This allows filtering according to Data Link, MTP2, BSAP, SCCP, ATM, A3 & A7 IOS Application Layer, AAL2, A9 & A11 IOS Application Layer, IP, TCP/UDP and more.

For A1, real-time capture filtering capabilities based on length of frames can be set. For A9 and A11, Ethernet based real-time capture filtering capabilities based on Source/Destination IP address, Mac Layer Address, and more can be applied. Users can specify custom VPI, VCI, and PT type values to filter frames during real-time capture for A3 A7 interfaces. Similarly, Search capability helps user to search for a particular frame based on specific search criteria.

Screen Shot of Setting the Filtering Criteria

Screen Shot of Setting Real-time Filtering Criteria for A1 interface

Screen Shot of Setting Real-time Filtering Criteria for A3 A7 interfaces

Screen Shot of Setting Real-time Filtering Criteria for A9 A11 interfaces

Reassembly in CDMA - A3 & A7 Interface

Using reassembly option user can specify VPI /VCI value to reassemble as per the Segmentation and Reassembly rules defined by the specified AAL type. It multiplexes ATM cells as per the user specified VPI/VCI/AAL type into CPS or SAR frames. ATM cells not satisfying the user specification will be reassembled as per the default specification.

Screen Shot of Capture Filter and Reassembly Options Window

Call Trace & Statistics View

Call trace defining important call specific parameters like call status, release cause, parties involved and more are displayed in Call Trace view. Call traces can also be logically grouped, with each group comprised of unidirectional (either 'Forward' or 'Backward') data links (applicable for A1 interface only).

Statistics is an important feature available in CDMA analyzer and can be obtained for all frames both in real-time as well as offline mode. Various statistics can be obtained to study the performance and trend in the CDMA network, based on protocol fields and different parameters such as Use Type (Key/Total/Field) , Statistic type (Frame count, Byte count, Frames/Sec) and patterns like Range List, Wild card.

Screen Shot of Statistics Window

Enhanced Trace Saving Options

Users can control the captured trace files by saving the trace using different conventions such as trace files with user-defined prefixes, trace file with date-time prefixes, and slider control to indicate the total number of files, file size, frame count, or time limit. This feature also allows the captured frames to be saved into a trace file based on the filtering criteria set using display filter feature.

Screen Shot of Enhanced Trace Saving Options Window

Save/Load All Configuration Settings

Protocol Configuration window provides a consolidated interface for all the important settings required in the analyzer. This includes various options such as protocol selection, startup options, stream/interface selection, filter/search criteria and so on. All the configuration settings done can be saved to a file and then loaded from a configuration file. Users may also just revert to the default settings using the default option.

Screen Shot of Save/Load All Configuration Settings Window

Bridge and Monitor Connections

• Monitor from a DSX-Patch Panel
  
• Bridge Mode Connections for Monitoring T1/E1 Signals for RJ-45
  
• Bridge Mode Connections Alternative Method
  
• RJ-45 Connections

Buyer's Guide:

* Specifications and features subject to change without notice.

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