2201R Mobile Tester User Guide
Chapter 1 Overview
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About the 2201R Mobile Tester
Cobham’s 2201R Mobile Tester addresses the specific features and frequency bands introduced by GSM-R, the
railway communication system based on GSM. The specific design of the 2201R’s RF front end allows direct
connection to GSM-R device types, including high-powered Power Class 2 radios.
The 2201R Mobile Tester is a test instrument for GSM-R mobile devices and portable GSM-R Cab Radio systems for
rail companies. Devices can be tested by simulating call features specific to the GSM-R, such as Voice Group Call
Service (VGCS) and Railway Emergency (REC) calls.
The 2201R Mobile Tester meets the requirements of installation teams, maintenance teams, service centers and
manufacturers of GSM-R terminals who need to perform fault analysis and diagnosis. It performs fast and accurate
RF measurements and offers a full range of features, including voice, data and the SMS testing functions for GSM-R
mobile handsets and cab radios. The 2201R supports both GSM and GSM-R phones and devices.
The 2201R can simulate group calls (VGCS) at various priority levels. These include emergency calls based on group
calls, to verify the performance of cab radios and peripherals such as optical and acoustical alarms. These tests ensure
proper performance of the overall radio system and help to verify safety function in an emergency case.
The 2201R lets you validate the correct operation of GSM-R radios through an easy-to-use interface, which allows
the setting of the group ID and priority level, used when performing a voice group call (VGCS). Depending on the
group ID and priority level, this will either be a standard call or an emergency call.
The 2201R allows voice group calls to and from the mobile to validate bi-directional communication. For the
mobile-originated call, the tester decodes the group ID and priority level, while performing measurements.
Features and capabilities
• GSM-Railway mobile tester
•Supports voice group call service (VGCS)
• Ability to define Group ID and priority level for VGCS
• GSM-R Emergency calls and validation of status messages
• Covers R-GSM and ER-GSM frequency range in addition to GSM 850/900/1800/1900
• Features remote control and built-in Autotest
• Listener mode and talker mode to verify the phone operation
• Standard transmitter and receiver RF measurements
• An optional battery pack is available to provide portability
• EDGE and GPRS transmitter measurements
• Support for Audio Loopback while VGCS MS call is active (supported only via SCPI)
• Support for a tone play during GSM call (supported only via SCPI)
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