GR-763, Issue 2, DTMF Digit Simulation Immunity Requirements, is a
module of FR-763-01, DTF Digit simulation Immunity. FR-763-01 also
contains LP-763-01, DTMF Digit simulation Test Stimulus (3 audio
CDs). FR-763-01 and its components completely replace GR-763, Issue 1.

To obtain both GR-763 and LP-763-01, you must purchase
FR-763-01.

For over 20 years, the Telcordia DTMF Digit Simulation Test Stimulus
(TR/GR-763) has been the industry-accepted tool to objectively measure and
evaluate the digit simulation immunity performance of DTMF receivers. This tool
accelerates equipment development and testing by condensing the equivalent of
100 hours of test stimulus to about 3 hours. Moreover, it is the only digit
simulation test stimulus for which the performance requirements have been
correlated with actual field data.

The Telcordia DTMF Digit Simulation Test Stimulus has been broadly used by
suppliers of network equipment, end user equipment, integrated circuits
manufacturers, and digital signal processing algorithm developers. It continues
to be the basis by which domestic and international service providers define
their network equipment performance needs for digit simulation immunity.

GR-763-CORE describes the test procedures and performance requirements for
DTMF receiver digit simulation immunity for various applications, including
traditional telecommunication systems, private branch exchanges, next generation
network equipment, end-user systems, and terminal equipment. It describes how to
use <DTMF Digit Simulation Test Stimulus, to measure the digit
simulation immunity of DTMF receivers to speech. Specifically, it describes how
to calibrate the playback environment, set the speech levels for individual DTMF
receiver applications, perform the test, and compare the test results against
the performance requirements and objectives.

GR-763-CORE has been reissued to address use of the DTMF Digit Simulation
Test Stimulus for many new applications, including:

• Next generation Network Equipment


• IP Multimedia Subsystem (IMS) Resource Functions


• Network-based Service Platforms


• IP-PBX/PBX Systems


• Unified/Voice Messaging Systems


• Interactive Voice Response Systems


• VoIP Terminals and Terminal Adapters


• Integrated Access Devices and Residential Gateways


• Customer Premises Equipment

• Order GR-763, and receive JUST the Telcordia GR


• Order LP-763-01, and receive JUST the 3 audio CDs.


• Order FR-763-01, and receive BOTH the GR-763-CORE (document) and
  LP-763-01 (3 audio CDs) at a discounted price.

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