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MAPS™ GSM A Interface Emulator
(GSM A Interface Emulation over TDM and IP)

MAPS™ GSM A Interface Emulator Software Ver 7.11.9 (64-bit Only) | Download Now!


GSM is a globally accepted standard for digital cellular communications. GSM stands for Global System for Mobile Communication and is an open, digital cellular technology used for transmitting mobile voice and data services. A GSM network is made up of multiple functional entities and interfaces that facilitate sending and receiving of signaling and traffic messages. It is a collection of transceivers, controllers, switches, routers, and registers.

The GSM network can be divided into following broad parts.

  • The Mobile Station (MS)
  • The Base Station Subsystem (BSS)
  • The Network Switching Subsystem (NSS)
  • The Operation Support Subsystem (OSS)

The MS and the BSS communicate across the Um interface, also known as the air interface or radio link. BTS and BSC will communicate across A-bis interface and The BSS communicates with the Network Service Switching center across the A interface.

At the MSC, the information is mapped across the A interface to the MTP Layers 1 through 3 from the BSC. Here the equivalent set of radio resources is called the BSS MAP. The BSS MAP/DTAP and the MM and CM are at the upper layers of Layer 3 protocols. This completes the relay process. Through the control-signaling network, the MSCs interact to locate and connect to users throughout the network. Location registers are included in the MSC databases to assist in the role of determining how and whether connections are to be made to roaming users.


GL’s MAPS™ GSM A Emulator is an advanced protocol simulator/tester for GSM simulation over A Interface that can simulate MSC and BSC network elements for exchanging BSSMAP and DTAP messages as defined by 3GPP standards. The tester supports  Error tracking, regression testing, conformance testing, load testing/call generation and generation of high volumes of GSM traffic over TDM as well as IP interface. It is able to run pre-defined test scenarios against GSM A interface test objects in a controlled & deterministic manner.

With the purchase of RTP licenses (PKS102, PKS108), MAPS™ GSM A IP supports CS Domain RTP traffic such as –Tx Rx File, Tones, Digits, FAX, User-defined traffic, IVR, Loopback and VQT.

With the purchase of RTP Core license (PKS102), MAPS™ GSM A supports transmission and detection of various RTP traffic such as, digits, voice file, single tone, dual tones, IVR, FAX*, Video*, and VQT*. With regular RTP traffic, the maximum Simultaneous Calls up to 2500, and Calls per Second up to 250 is achievable. Almost all industry standard voice codec supported.

MAPS™ GSM A IP supports mobility management procedures over GSM A interface such as Location Management Procedure, Mobile Originating and Terminating Procedures, and Handover Management Procedures. It supports send/receive SMS simultaneously using signaling channel with the voice/data/fax services over a GSM network.

GSM A Interface Emulator supports powerful utilities like Message Editor, Script Editor and Profile Editor which allow custom call scenarios to be created or existing scenarios to be modified.

With the purchase of TDM traffic licenses (xx610, xx620, xxFT0) GSM traffic can be simulated over T1/E1 interfaces. Supported traffic includes transmission and detection of digits, voice files, single tone, dual tones, FAX, Dynamic VF, User defined Traffic, IVR, and VQT.

GL has enhanced the MAPS™ protocol emulation tool to simulate multi-protocol and multi-interface offering a complete range of test solutions, covering the entire 2G, 3G, and 4G network.

By mimicking real-world customer behavior in lab environments, our solutions allow mobile operators and equipment manufacturers to verify their wireless networks before deployment. In other words, one can setup a virtual real-time network simulating all the network elements using “MAPS 2G Wireless Lab Suite”. The test suite supports simulation of GSM Abis, GSM A, C/D/E, Gb, and GnGp interfaces.

MAPS™ GSM A IP is also available in High Density version (requires a special purpose network appliance and PKS109 RTP HD licenses). This is capable of high call intensity (hundreds of calls/sec) and high volume of sustained calls (tens of thousands of simultaneous calls/platform).

** Some of these traffic types requires additional licenses – contact GL for more information

Possible applications include:

  • Setup a virtual real-time network simulating 2G-GSM GPRS network elements using ‘MAPS™ 2G Wireless Lab Suite
  • Multi-protocol, Multi-interface Simulation
  • Provides fault insertion, and erroneous call flows testing capability.
  • Performance testing, Load Testing, Function al testing, Regression testing and Conformance testing of network elements.
  • Ready scripts makes testing procedure simpler, less time consuming and hence time to market products.
  • Test response of network against protocol message modification, or corruption
  • Inter-operability testing of networks
  • Wrap-around testing (WAT)
  • SMS Testing from within the Wireless Infrastructure using MAPS™

Supported Protocols Standards

GSM A IP Interface Protocol Standards
Supported Protocols Standard / Specification Used
SCCP Q.713, CCITT (ITU-T) Blue Book
M3UA RFC 3332
BSSMAP / DTAP 3GPP TS 08.08 V8.9.0, 3GPP TS 48.008 V10.0.0 (2011-01)
MM/CC 3GPP TS 04.08 V7.17.0
RR 3GPP TS 04.18 V8.13.0
SMS 3GPP TS 03.40 V7.5.0 &
3GPP TS 04.11 V7.1.0 GSM 03.38 version 7.2.0 Release 1998

Location Updating Call Procedure

LUC Procedure

LUC Generation and Reception
The MAPS™ GSM A can also act as Base Station Controller (BSC) initiating the Location Updating Call procedure by sending Location Updating Request to the Network (MSC). The DUT on receipt of a LOCATION UPDATING REQUEST message sends a CC connection confirm message in response as shown in the figure below. Also, simulates the complete call flow as in typical Location Updating Call (MOC) procedure.

LUC Call Generation

LUC Call Reception

Mobile Originating Call Procedure

MOC Procedure

MOC Generation and Reception
MAPS™ GSM A acts as Base Station Controller (BSC) and initiates the Mobile Originating Call procedure by sending CM Service Request to the DUT (MSC). The DUT on receipt of a CM SERVICE REQUEST message should send a CC connection confirm message in response as shown in the figure below. Also, simulates the complete call flow as in typical Mobile Originating Call (MOC) procedure.

MOC Call Generation

MOC Call Reception

Mobile Terminating Call Procedure

MTC Procedure

MTC Generation and Reception
MAPS™ GSM A acts as Mobile Station Controller (MSC) processing the call flow by initiating the Paging message to from the Mobile Station (BSC). The DUT (BSC) on receipt of a Paging message, sends a Paging Response message back to MSC. Also, simulates the complete call flow as in typical Mobile Terminating Call (MTC) procedure.

MTC Call Generation

MTC Call Reception

Handover Management Procedure

When a mobile user travels across two different cell coverage areas within an active call duration, the call is transferred to the new cell’s base station. When the user is travelling across two different cell coverage areas, the Handover procedures are initiated from old BSC to new BSC via MSC. These procedures can be simulated using MAPS™ GSMA over IP Emulator.

Handover Management Procedure

The following diagram depicts the typical end-to-end call flow between the entities during the Handover procedure:

Typical Handover Management Call Procedure

The following screenshot depicts the end-to-end Handover call flow between the old BSC and new BSC via MSC simulated using MAPS™ GSMA over IP Emulator.

Handover Management Procedure Simulation using MAPS™


Testbed Setup Configuration Load Generation Parameters Script Editor Profile Editor

Message Edito Script
Contents and Script Flow
Call Statistics Message Statistics

Event Log Screenshot of Link Status User Defined Graph

User Defined Voice Quality Statistics

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 TDM Network
(requires T1 or E1 Hardware and Basic Software)
XX692 MAPS™ GSM A Emulator
XX694 MAPS™ MAP Emulator
XX696 MAPS™ CAP Emulator
XX649 MAPS™ SS7 Emulator
XX647 MAPS™ SS7 Conformance
XX652 MAPS™ MC-MLPPP Conformance
XX648 MAPS™ ISDN & LAPD Emulator
XX642 MAPS™ ISDN & LAPD Conformance Emulator
XX693 MAPS™ GSM Abis Emulator
XX651 MAPS™ CAS Emulator
XX656 MAPS™ INAP Emulator
XX682 MAPS™ IUP Emulator
XX624 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)
PTE001 tProbe™ Dual T1 E1 Laptop Analyzer with Basic Analyzer Software
HTE001 Universal T1 E1 PCI Card with Basic Analyzer Software
UTE001 Portable USB based Dual T1 or E1 Laptop Analyzer with Basic Analyzer Software
Item No. MAPS™ for Wireless Network
  Related Software
PKS140 MAPS™ LTE S1 Emulator
PKS142 MAPS™ LTE eGTP (S3, S4, S5, S8, S10, S11 & S16) Emulator
PKS141 MAPS™ LTE X2 AP Emulator
PKS146 MAPS™ SGs Interface Emulation
PKS160 MAPS™ UMTS IuCS IP Emulator
MAPS™ UMTS IuH IP Emulator
PKS164 MAPS™ UMTS IuPS Emulator
PKS166 MAPS™ UMTS Gn Gp Emulator
LTS220 MAPS UMTS IuCS ATM Emulator over OC-3 / STM-1
requires LTS214 + LightSpeed1000™ Hardware; optional LTS217
LTS214 OC-3 / STM-1 SSCOP Server
LTS320 MAPS UMTS IuCS ATM Emulator over OC-12 / STM-4
requires LTS314 + LightSpeed1000™ Hardware; optional LTS317
LTS314 OC-12 / STM-4 SSCOP Server
PKS131 MAPS™ Gb Emulator over IP for BSC & SGSN
  Related Hardware
LTS100 Lightspeed1000™ - Dual OC3/12 STM1/4 PCIe Card
 Item No. MAPS™ for IP Network
PKS151 MAPS™ CAMEL IP Emulator
MAPS™ MEGACO Conformance Test Suite (Test Scripts)
MAPS™ – MGCP Protocol Emulation with Conformance Test Suite
MAPS™ SIP Emulator
SIP Conformance Test Suite (Test Scripts)
PKS126 MAPS™ SIP I Emulator
PKS132 MAPS™ MAP IP Emulator


MAPS™ Lb Interface Emulator


MAPS™ SLs Interface Emulator


MAPS™ IuPC Interface Emulator

PKS134 MAPS GSM Abis IP Emulator
PKS137 MAPS™ GSM A IP Emulator
PKS149 MAPS™ Skinny Emulator
PKS155 MAPS™ BICC IP Emulator
PKS136 MAPS™ INAP Emulator (ANSI, ITU)
PKS139 MAPS™ Diameter Emulator
Item No. Traffic Options
File based Record/Playback
Transmit/Detect digits (Place Call/ Answer Call)
Multi-Channel TRAU Tx/Rx Emulation and Analysis
PKS102 RTP Soft Core for RTP Traffic Generation
PKS200 RTP Pass Through Fax Emulation



PacketCheck™ - Packet GTP Traffic Simulation

Mobile Traffic Core-GTP

Mobile Traffic Core-Gateway

Mobile Traffic Core - GPRS Gb
LTS217 OC-3 / STM-1 AAL2 Traffic Core
LTS317 OC-12 / STM-4 AAL2 Traffic Core
Item No. Related Software
XX120 SS7 Analyzer Software
OLV120 Offline/ Remote SS7 Analyzer Software
XX100 ISDN Analyzer Software
OLV100 Offline/ Remote ISDN Analyzer Software
XX150 T1 or E1 Real-time GSM Protocol Analyzer
OLV150 Offline T1 or E1 GSM Protocol Analyzer
XX165 T1 or E1 Real-time UMTS Protocol Analyzer
PKS100 PacketGen™ with PacketScan™
PKV100 PacketScan™ (Online and Offline)
RTP Toolbox™
G.168 Echo Canceller Test Compliance Suite
PKV105 SIGTRAN Analyzer (requires PKV100)
PKV107 LTE (Long Term Evolution) Analyzer (Optional with PacketScan™)
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