MAPS™
ISDN Protocol Emulator
(Scripted ISDN Protocol Emulation)
Overview
GL’s MAPS™ ISDN is an advanced protocol simulator/tester for ISDN simulation over TDM (T1E1) and generates high volumes of ISDN traffic. The
tester can simulate ISDN signaling as defined by the ITU-T standards. Currently this test tool is used to perform testing using ISDN protocol messages over
T1/E1, and offers a complete solution for testing, troubleshooting, and maintenance of devices and networks implementing PRI ISDN.
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It is useful to test ISDN products designed for either U or S/T interface, including network terminations, Type 1 terminating equipment,
and terminal adapters.
MAPS™ ISDN also incorporates the flexibility to modify ISDN call parameters & message contents (arbitrary manipulation of messages, information
elements and message sequence on the different protocols). This flexibility ensures that the MAPS™ ISDN communicates with the system under test.
It is even possible to emulate a complete ISDN connection (switch to subscriber) all in the same PC with a dual interface card or dual laptop analyzer. Link
status (Lap D) is also configured.
MAPS™ ISDN supports powerful utilities like Message Editor and Script Editor which allow new scenarios to be created or existing scenarios to be
modified using ISDN messages and parameters.
GL also provides a GUI based ISDN protocol analyzer (optional application – xx100) for on-line capture and decode of the
signaling in real-time both during tests and as a stand-alone tracer for live systems.
Supported Protocol Standards
| Supported Protocols |
Standard / Specification Used |
| Q.931 |
ITU-T Q.931 / Q.932(Facility IE) / Q.955.3 (MLPP Procedures) |
| 4ESS |
ISDN PRI (TR-41449) |
| 5ESS |
ISDN PRI (Lucent Tech - 5ESS 2000) |
| BELL |
ISDN PRI (Bell Core SR-NWT-002343) |
| DMS-100 |
Nortel's Switch DMS 100 NIS-A2111-1 |
| DMS-250 |
Nortel's Switch DMS 250 NIS-A2111-4 |
| QSIG ECMA |
Standard ECMA-143 4th Edition - December 2001 |
Main Features
- ISDN simulation over TDM (E1/T1)
- Supports transmission and detection of TDM traffic - digits, voice file, single /dual tones
- Multiple T1/E1 line interfaces supported
- Access to all ISDN Message Parameters such as Setup, Connect, Release messages, and more
- Switch and Subscriber Emulation
- Provides various release cause codes such as rejected, no user response, user busy, congested, and so on to troubleshoot the problems in ISDN
- User controlled access to optional ISDN parameters such as timers
- Impairments can be applied to messages to simulate error conditions
- Supports customization of call flows and message templates using Script editor and Message editor.
- Ready-to-use scripts for quick testing
- Supports scripted call generation and automated call reception.
- Provides protocol trace with full message decoding, and graphical ladder diagrams of call flow with time stamp
- Script based & protocol independent software architecture.
- Provides call statistics with associated captured events and error events during call simulation
Test Configuration
The test configuration window allows users to configure LAPD layer parameters to transmit and receive ISDN messages over LAPD layer. The configuration
window for MAPS™ ISDN includes parameters for T1/E1 (GL) server and LAPD Task along with LAPD signaling.
Screen Shot of ISDN Testbed Setup Configuration
Call Generation
Call Generation option allows the user to simulate outgoing communications where an outgoing call is initiated by sending call control messages using
proper scripts and profiles. The profile allows necessary parameters of call control messages to be changed during runtime.
Call Flow diagram
The screenshot below shows MAPS™ acting as subscriber and initiating the SETUP message to switch.
Call Generation
Call Reception
Call generated from other entity can be automatically detected in call reception window by pre-setting the required scripts in the Incoming Call
Handler window.
The screenshot below shows MAPS™ acting as switch and responding to the SETUP message from subscriber.
Screenshot of Call Reception Window
Bulk Call Simulation
MAPS™ supports Bulk Call Simulation and Stress/Load Testing capabilities through Load Generation feature. Load Generation window helps users
configure Stress/Load Testing parameters such as Call per second (CPS) or Busy hour call attempts (BHCA), Max Simultaneous Calls and Burst parameters.
Screenshot of Load Generation Parameters
Customization of Call Flow and Messages Using Pre-Processing Tools
- Script Editor - The script editor allows the user to create / edit scripts and to define variables for the protocol fields. 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
Screenshot of Script Editor
- Profile Editor - Profiles are used to provide the user configured values to the fields in the Messages (i.e Message Template in MAPS™)
through variables which are going to change during the course of a call.
Screenshot of Profile Editor
- Message Editor - The Message Template is a *.HDL file that 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.
Screenshot of Message Editor
Call Flow & Script Execution Control
Message Sequence - MAPS™ provides protocol trace with full message decoding, custom trace, and graphical ladder diagrams of call
flow with time stamp while simulation is running. Call flow graph allows to easily verify the messages exchanged between MAPS™ and DUT.
See Call Generation and Call Reception for details
Script Contents & Script Flow - The Scripts Contents window displays the contents of the script selected for call generation or reception.
The Script Flow window displays the set of statements successfully executed by MAPS™ to help users in troubleshooting a particular the call scenario.
Events & Event Profile Editor - User-defined events allow redirection of script execution on-the-go. The custom parameters in the events can
also be changed during script execution using Event Profiles.
Screenshot of Script Contents and Script Flow
Screenshot of Event Config
Call Statistics, Events, Link Status
Call Statistics & Status - 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, and failed calls. It is also possible to characterize the statistical information
under different groups of call handling scripts under a unique heading. In addition, Call Generation and Call Reception windows provide useful call
status & script execution results.
Screenshot of Call Statistics and Status
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.
Screenshot of Event Log
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.
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 HDT, HDE, HUT, HUE, UTA or UEA depending upon the hardware.
Specifications are subject to change without notice.
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Index Page
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