GL Communications Inc.

Message Automation & Protocol Simulation (MAPS™)


GL's Message Automation & Protocol Simulation (MAPS™) is a protocol simulation and conformance test tool that supports a variety of protocols such as SIP, MEGACO, MGCP, SS7, ISDN, GSM, MAP, CAS, LTE, UMTS, SS7 SIGTRAN, ISDN SIGTRAN, SIP I, GSM AoIP, Diameter and others. This message automation tool covers solutions for both protocol simulation and protocol analysis. The application includes various test plans and test cases to support the testing of real-time entities. Along with automation capability, the application gives users the unlimited ability to edit messages and control scenarios (message sequences). "Message sequences" are generated through scripts.

MAPS™ supports transmission and detection of various traffic types over  IP (RTP, GTP), ATM, GSM (TRAU), & TDM - such as, digits, voice file, single tone, dual tones, fax, sms, email, http, ftp, and video. MAPS™ also includes support for wide range of codec rates – visit and webpage for more details. Verify your latest mobile features over the network with various types of traffic generators and receivers. In GPRS, packet data traffic can be generated and validated with GTP traffic modules. Circuit switched traffic can be generated and recorded using RTP core module.

GL's MAPS™ is designed to work on TDM interfaces as well as on the IP/Ethernet interfaces. TDM signaling protocols such as SS7, ISDN, MLPPP, CAS, MAP, CAP, GSM, INAP, and BICC operate over TDM networks, where as VoIP protocols SIP, SIP-I, MEGACO, MGCP, SIGTRAN, Diameter, INAP, MAP, CAP, and BICC operate over IP transport layer.

MAPS™ also supports 3G & 4G mobile protocol standards for testing the rapidly evolving mobile technologies. MAPS™ can simulate radio signaling protocols such as LTE (S1, eGTP, X2) interfaces and UMTS (IuCS, IuPS, IuH), GPRG Gb, and GSM A over IP transport layer.

MAPS™ test suite is enhanced to simulate multiple UEs and IMS core elements such as P-CSCF, I-CSCF, S-CSCF, PCRF, MGCF in IMS core network. With the help of mobile phones, and other simulated wireless networks, the VoLTE Lab setup can be operated in real-time for making VoLTE calls and also for interworking with PSTN and VoIP networks.

GL’s MAPS™ is enhanced to a High Density version and a special purpose 1U network appliance that is capable of high call intensity (hundreds of calls/sec) and high volume of sustained calls (tens of thousands of simultaneous calls/1U platform).

General MAPS™ Features

Call Simulation and Control

The signaling and traffic simulation in a call is completely implemented using scripts. Commands in the scripts are executed in controlled way to simulate protocol and traffic behavior. Most of the commands used in the scripts are generic and independent of specific protocol.

MAPS™ application acts as either the Caller or resides at the network terminal acting as Callee. The Call Generation feature simulates an outgoing call by sending call control messages to the DUT using scripts and profiles. The profiles allow necessary parameters of call control messages to be changed during runtime. Call generated from other entity can be automatically detected in call reception window by pre-setting the required answer scripts in the Incoming Call Handler.

Message Sequence - Each call scenario provides the trace with full decoding of the messages exchanged between the MAPS™ and the DUT, and graphical ladder diagrams of the call flow with time stamp. Impairments can be applied to messages to simulate error conditions that occur in real-time networks.

Event-Driven Control - Scripts execution, being event-based, allows redirection of script execution on-the-go with user-defined events. The custom parameters in the events can also be changed during script execution using event profiles.

Script Contents & Script Flow - The script flow and the contents window displays the Script Name, Sub-script Name, Script line number, and script statements to be successfully executed, which help the users in troubleshooting a particular call scenario.

Traffic Simulation

The call control scripts can also automatically handle the traffic over the established call. MAPS™ supports transmission and detection of various traffic types over  IP (RTP, GTP), ATM, & TDM over established calls with the support of necessary hardware. The types of traffic supported are -

  • Analog and TDM Traffic (digits, voice files, single tones, dual tones, Dynamic VF, fax, sms, and IVR)
  • RTP Traffic (digits, voice files, single / dual tones, fax, video, and IVR)
  • Mobile Traffic (User-plane GTP and Gateway – SMS, HTTP, Email, FTP, Video)
  • Short Message Service (SMS) Test Solutions.

For more information, visit

MAPS™ also includes support for wide range of codec rates – visit webpage for more details. 

Bulk Call Simulation and Load Testing

MAPS™ supports automated stress/load testing capabilities through Load Generation and Bulk Call Simulation features. Bulk Call Simulation allows quick configurations to easily create multiple test entries with different scripts and profiles. Multiple tests can be run simultaneously or sequentially (queue up tasks in succession). Load generation feature further allows specifying the patterns with which the bulk calls can be generated. Load generation can be customized with different statistical distribution patterns such as Uniform, Ramp, Sawtooth, Fixed, Normal, Step, and Step-Sawtooth distribution. Load Generation supports Unique and Multi Distribution patterns. Unique Distribution pattern option allows to configure single distribution pattern for each loaded script, whereas with Multi Distribution pattern, multiple patterns can be configured for each loaded script. Call duration also can be randomized using similar statistical distribution. This feature also helps users configure Stress/Load Testing parameters such as Call per second (CPS), Max Active Call, Minimum and Maximum Call Rates, Start Call Rates, and other parameters.


Scheduler can be used to schedule the simulation of bulk calls or manual calls at a specific start time. The pre-saved master configuration files for test setup and call simulation are automatically loaded to automate the test procedure.

Customization of Test Setup Parameters

The test setup profiles (.xml files) allow users to configure the necessary parameters in order to establish communication between MAPS™ and the DUT. It includes configuring parameters of the network nodes, the network properties, and transport related configurations such as T1/E1 timeslots, IP Address and port numbers for both MAPS™ and the DUT.

Once the transport layer is configured properly, protocol specific signaling messages and traffic can be transmitted and received successfully. All parameters setup in test setup are global and are accessible to all scripts. These parameters initialize protocol engines and the transport modules specific to the protocol.

Customization of Test Parameters, Call Flow, and Protocol Messages Using Pre-Processing Tools

  • Message Editor - The Message Templates (GL’s proprietary *.HDL files) comprises of protocol encoding parameters with preset values. It is required to create a message template for every message in a protocol. The message templates are called within the scripts to perform scenario based testing.
  • Profile Editor – Profiles (*.xml files) are used to change the values of the fields in the messages (i.e. Message Template in MAPS™) during the course of a call. The multiple profiles with varying parameter values that allow users to configure call instances in call generation and to receive calls.
  • Script Editor - The script editor allows the user to create / edit scripts and to define variables for the fields in the messages. The script uses pre-defined message templates to build call flow and perform send and receive actions. Script editor provides options to run the test for multiple iterations in sequential or random flow. Commands allow retransmission of messages with specific interval.

Command Line Interface

Supports scripting through a Command Line Interface (CLI) such as the TCL, Python, VBScript, Java, and .Net , using MAPS™ client-server functionality (requires additional license)

MAPS™ can be configured as server-side application, to enable remote controlling of the application through multiple command-line based clients. Supported clients include TCL, Python, VBScript, Java, and .Net. TCL provides a simple scripting language, with programming facilities such as looping, procedures, and variables. The TCL Client application includes a MapsTclIfc.dll file, a packaged library that enables communication with the Server from a TCL environment.

User can remotely perform all functions such as start test bed setup, load scripts and profiles, apply user events such as send digits/file/tones, detect digits/file/tones, dial, originate call, terminate call, start and stop traffic and so on. User can also generate and receive calls through commands. This client application is distributed along with MAPS™ Server application. Multiple MAPS™ CLI servers can be controlled remotely from single client application.

Call Statistics, Events, Link Status, User Defined Statistics

Call Status & Message Statistics - By default, all call handling scripts (irrespective of the type of the functions) are assessed by MAPS™ to provide statistical information about Total Calls, Active Calls, Completed Calls, Passed Calls, Failed Calls, and Calls/Sec. It is also possible to categorize the statistical information as per the call handling scripts. In addition, Call Generation and Call Reception windows provide useful call status & script execution results.

In addition, Message Stats option for any specific protocol, logs number of times the messages are being transmitted (Tx Count) and received (Rx Count), thus allowing user to monitor the occurring events.

User Defined Statistics – Users can customize the global statistics for RTP audio and video traffic. These global parameters are defined in the call generation scripts, which are calculated and updated periodically providing call quality metrics such as Listening MOS, Conversational MOS, PacketLoss, Discarded Packets, Out of Sequence Packets, Duplicate Packets, Delay and Jitter.

Events Reporting – MAPS™ provides Event Log, Error Events, and Captured Errors windows that log the captured events and errors encountered during the progress of the call.

Link Status - Link Status window indicates transport related information of the protocol, for example, if SCTP is used as transport, it indicates if the association is Up or Down in the Link Status window. MAPS™ IuCS ATM uses SSCOP transport and the associated link status is indicated as Up or Down in the Link Status window.



MAPS™ Working Principle

Working Principle of MAPS™ Application

Call Control (Call Generation and Reception)

  • Protocol Engine
    Forms the backbone of MAPS™ application that contains Message Templates, and Call Handlers to help MAPS™ encode and decode protocol messages, exchange user-defined protocol field values at run time, and generate call flows.

  • Transport Handlers
    Support send & receive protocol messages over various transport layers - UDP,   TCP, SCTP, LAPD, MTP2, and ATM.

  • Global Configurations
    Handles parameter configurations that are common across different test scenarios, such as protocol timers, inter-call duration, and so on.

  • Impairment and Retransmission Modules
    These modules support unexpected call behaviors to test system performance under realistic network conditions. These include – tests to introducing impairments at the traffic level or at the communication protocol level, retransmission of messages at defined interval of time, and so on .
  • Traffic Handlers
    These modules support generating and received traffic from the other network entities using different traffic type – Traffic over TDM / Analog, over IP, and encapsulation of IP traffic over GTP (Mobile Gateway / Packet Traffic)

Pre-processing Tools

Script Editor

    • Allows users to build valid and invalid test cases
    • Includes ready-to-run scripts for simulating important call scenarios / procedures.
    • Offers ‘syntax-ready commands’ to easily build scripts
    • Reusability, easy maintainability and reduced ‘time-to-market’.

Message Editor

  • Allows users to modify any signaling message, message parameters, and/or information elements.
  • Add, modify or remove any optional parameters depending on specific feature of interest.
  • Perform packet level fault insertion by impairing any bit / byte of a message.

Profile Editor

    • Allows users to create multiple user-configuration profiles to suit different testing needs
    • Values from the profiles replaces the original values in the messages during run-time


MAPS™ can be configured as server-side application, to enable remote controlling through multiple command-line based clients. Supported clients include Java, VBScripts, TCL, Python and others. The MAPS™ APIs allows for programmatic and automated control over all MAPS™ platforms. Each MAPS™ server can receive multiple client connections and offer independent execution to each client. Likewise, a single client can connect to multiple MAPS™ servers, including servers running different protocols, permitting complex cross-protocol test cases.

Client provides a simple scripting language, with programming facilities such as looping, procedures, and variables. The Client application includes a MapsClientIfc.dll file, a packaged library that enables communication with the Server from the client environment. The advantage of such communication enables user to control MAPS™ by sending commands and receiving responses in a scripting language already familiar with many users.

Clients can remotely perform all functions such as start testbed setup, load scripts, and profiles, apply user events such as send digits/file/tones, detect digits/file/tones, dial, originate call, terminate call, start and stop traffic and so on. User can also generate and receive calls through commands. This client application is distributed along with MAPS™ Server application.

for more infomation, pleas visit MAPS™ APIs for Complete Automation page.

Buyer's Guide

Please Note: The XX in the Item No. refers to the hardware platform, listed at the bottom of the Buyer's Guide, which the software will be running on. Therefore, XX can either be ETA or EEA (Octal/Quad Boards), PTA or PEA (tProbe Units), UTA or UEA (USB Units), HUT or HUE (Universal Cards), and HDT or HDE (HD cards) depending upon the hardware.

Item No. MAPS™ for Wireless Network
  Related Software


MAPS™ LTE S1 Emulator


MAPS™ LTE eGTP (S3, S4, S5, S8, S10, S11 & S16) Emulator


MAPS™ LTE X2 AP Emulator


MAPS™ UMTS IuH IP Emulator


MAPS™ UMTS IuPS Emulator


MAPS™ UMTS Gn Gp Emulator


MAPS UMTS IuCS ATM Emulator over OC-3 / STM-1
requires LTS214 + LightSpeed1000™ Hardware; optional LTS217


OC-3 / STM-1 SSCOP Server


MAPS UMTS IuCS ATM Emulator over OC-12 / STM-4
requires LTS314 + LightSpeed1000™ Hardware; optional LTS317


OC-12 / STM-4 SSCOP Server


OC-3 / STM-1 AAL2 Traffic Core


OC-12 / STM-4 AAL2 Traffic Core


MAPS™ Gb Emulator over IP for BSC & SGSN

  Related Hardware


Lightspeed1000™ - Dual OC3/12 STM1/4 PCIe Card

 Item No. MAPS™ for IP Network


MAPS™ MEGACO Conformance Test Suite (Test Scripts)


MAPS – MGCP Protocol Emulation with Conformance Test Suite


MAPS™ SIP Emulator
SIP Conformance Test Suite (Test Scripts)


MAPS™ SIP I Emulator




MAPS™ MAP IP Emulator






MAPS GSM Abis IP Emulator


MAPS™ GSM A IP Emulator


MAPS™ Skinny Emulator


MAPS™ BICC IP Emulator




MAPS™ Diameter Emulator


MAPS™ SIP for ED137 Radio
MAPS™ SIP for ED137 Telephone

Item No. MAPS™ for TDM Network
(requires T1 or E1 Hardware and Basic Software)


MAPS™ ISDN & LAPD Conformance Emulator


MAPS™ ISDN Emulator


MAPS™ SS7 Emulator


MAPS™ SS7 Conformance


MAPS™ GSM A Emulator


MAPS™ GSM Abis Emulator


MAPS™ CAS Emulator


MAPS™ MC-MLPPP Conformance


MAPS™ MAP Emulator


MAPS™ CAP Emulator


MAPS™ INAP Emulator


MAPS™ FXO FXS Emulator (only for tProbe)

  Related Hardware



QuadXpress T1E1 Main Board (Quad Port – requires additional licenses)

OctalXpress T1E1 Main Board plus Daughter Board (Octal Port – requires additional licenses)


tProbe™ Dual T1 E1 Laptop Analyzer with Basic Analyzer Software


Universal T1 E1 PCI Card with Basic Analyzer Software


Portable USB based Dual T1 or E1 Laptop Analyzer with Basic Analyzer Software

Item No. Traffic Options
  GTP Mobile Traffic Options


MobileTrafficCore - GTP
MobileTrafficCore - Gateway
MobileTrafficCore for Gb Interface

  TDM Traffic Options


File based Record/Playback
Transmit/Detect digits (Place Call/ Answer Call)
Multi-Channel TRAU Tx/Rx Emulation and Analysis


OC-3 / STM-1 AAL2 Traffic Core


OC-12 / STM-4 AAL2 Traffic Core



Fax Emulation

Fax Port Licenses
Fax Port Licenses
Fax Port Licenses
Fax Port Licenses
Fax Port Licenses

  RTP Traffic Options


RTP Soft Core (additional)


RTP IuUP Softcore


RTP Pass Through Fax Emulation
Fax Port Licences
Fax Port Licences
Fax Port Licences
Fax Port Licences
Fax Port Licences


T.38 Fax Simulation




RTP Voice Quality Measurements


MAPS™ High Density RTP Generator


RTP Video Traffic Generation


Optional Codec – AMR – Narrowband (requires additional license)


Optional Codec - EVRC (requires additional license)


Optional Codec – EVRC-B (requires additional license)


Optional Codec – EVRC-C (requires additional license)


Optional Codec – AMR - Wideband (requires additional license)

PCD108 Optional Codec  - EVS (requires additional license)
Item No. Related Software


SS7 Analyzer Software


Offline/ Remote SS7 Analyzer Software


ISDN Analyzer Software


Offline/ Remote ISDN Analyzer Software


T1 or E1 Real-time GSM Protocol Analyzer


Offline T1 or E1 GSM Protocol Analyzer


T1 or E1 Real-time UMTS Protocol Analyzer


PacketGen™ with PacketScan™


PacketScan™ (Online and Offline)


PacketScan™ HD w/4 x 1GigE


PacketScan™ HD w/2 x 10GigE

PKV124 PacketScan HD™ w/2 x 40GigE
PKV125 PacketScan HD™ w/1 x 100GigE


PacketRecorder HD™ & PacketRePlay HD™       


PacketScan™ FB


RTP Toolbox™
G.168 Echo Canceller Test Compliance Suite


SIGTRAN Analyzer (requires PKV100)


LTE Real-time LTE Protocol Analyzer (Requires PKV100)

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