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Solving Radio PTT Issues in VoIP

Networks

Emergency Communications WorkshopPTC ‘16 January 2016

Charles DeRoller, REDCOM

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What is PTT?

Press To Talk

Press To Transmit

Integral to radio operation

Keys radio for transmit

Eliminate background noise

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PTT & Voice Latency

Timing (latency) of PTT signal is significant

Too early and induces background noise

Too late and communications truncated

“Don’t Shoot” becomes “Shoot” received

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PTT in Legacy Switch Networks

Extends reach globally, securely

Interconnect radio nets w/ other nets, operators, phones

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PTT in Legacy Switch Networks

PBX and C&C networks may pass PTT

Core elements must support it

Signal passed via leads (analog or digital)

Keys remote radio

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Radios and VoIP

Global migration to VoIP

Particularly for transmission

Extremely immature for radios

No specification for PTT over IP

No assurance of PTT timing

“don’t shoot” becomes “shoot”

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PTT through the IP Network

“Data Plane” for voice

“Control Plane” for PTT

Prioritize in network

Still no guarantee of proper timing

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REDCOM’s PTToIP™

Patented method of solving PTToIP™ latency

Assures radio is keyed (via PTT) before Voice

REDCOM Core switches & Radio Gateway

IP transmission network agnostic

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Customized PTT

API integration tools

Adapt to existing networks

Design VoIP-based radio networks

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Summary

PTToIP significant missing element in RoIP

No global plan to address it

REDCOM solution available today

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Contact Information

One Redcom Center

Victor, New York 14564-0995

(585) 924-6500

sales@redcom.com

www.redcom.com

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Disclosure

The information presented in this presentation is subject to change without notice

or obligation.

Content produced by third parties is not necessarily endorsed or supported by

REDCOM.

The REDCOM name, logo, SLICE® and TRANSip® are registered trademarks of

REDCOM Laboratories, Inc. ClusterNet™, CommandSet™, CrucialConnect™,

Infinion™, Sigma™, and SLICE® 2100™ are trademarks of REDCOM Laboratories, Inc.

CLASSSM is a service mark of Telcordia Technologies, Inc. All other trademarks and

service marks are properties of their respective owners.

REDCOM products are covered by one or more U.S. and international patents.

©2015 REDCOM Laboratories, Inc. All rights reserved.