Push-to-Talk Over Cellular (PoC) radios are revolutionizing enterprise communication by providing near-instant connectivity over cellular networks. However, performance factors like latency, reliability, and service level quality depend on critical infrastructure elements such as local breakout and optimized PTT services. This article explores how these factors influence PoC performance and why businesses should consider connectivity providers that offer optimized solutions.

Understanding Local Breakout in PoC Networks

Local breakout refers to the point where PoC traffic exits the cellular network and enters the public or private IP network. When the breakout occurs closer to the user’s location, the data travels a shorter distance, resulting in lower latency and faster call setup times.

How Local Breakout Affects PoC Performance

1. Reduced Latency – If all traffic is routed through a central PoC server far from the user (e.g., in another country), it increases latency. A regional or local breakout reduces the distance data travels, leading to near-instant PTT communication.
2. Improved Call Quality – Faster and more direct routing enhances voice clarity and reduces packet loss, leading to more reliable push-to-talk interactions.
3. Better Network Redundancy – Local breakouts allow multiple routing paths, reducing single points of failure and ensuring communication remains stable.
4. Regulatory & Compliance Benefits – Certain industries require data routing within specific geographical areas for compliance with data sovereignty regulations.

Global PoC Optimization: A Breakout Per Continent & Regional PTT Servers

For companies operating PoC services across multiple regions, a global breakout strategy is critical to reducing latency and maintaining service reliability. The ideal setup requires:

• A breakout per continent – One in the USA for North America, one in Europe, and one in APAC.
• Regional PTT servers – The PTT server should be in the same region as the breakout to avoid unnecessary latency hops.

Why This Matters

If a PoC user in Europe needs to communicate but their traffic routes through a breakout in the USA, their voice data has to travel across the Atlantic before reaching the recipient. This increases latency and response time, making the service less reliable.

To minimize latency hopping, each major region should have:

• A PoC breakout in the same region where the service is used.
• A PTT server co-located or nearby to handle communication efficiently.

How This Setup Reduces Latency & Improves Performance

With this setup, PoC users in North America, Europe, and APAC experience the best possible service, as their data doesn’t have to make unnecessary transcontinental trips.

Optimizing PTT Services for Maximum Efficiency

A well-optimized PoC network should include dedicated PTT servers that manage and prioritize push-to-talk traffic over the network. Here’s why this matters:

• Priority Routing – A dedicated PTT core ensures that voice traffic is prioritized over general internet traffic, reducing lag.
• Traffic Optimization – Intelligent PTT solutions can dynamically adjust bandwidth usage to maintain quality even under heavy network load.
• Support for Private APNs – Secure and isolated connectivity using Private Access Point Names (APNs) can further enhance performance and security for businesses using PoC radios.
• Edge Computing Benefits – Hosting PTT servers closer to users at the network edge (rather than a centralized cloud location) further reduces latency and improves push-to-talk response times.

Why Your PoC Solution Needs a Global Breakout Strategy

Businesses adopting PoC radios should prioritize connectivity providers that offer:

• Local or regional breakout points to minimize latency.
• Dedicated PTT service optimization to ensure real-time voice communication.
• Secure and reliable network architecture with redundancy and compliance support.

At Simplex Wireless, we specialize in low-latency IoT connectivity that enhances PoC radio performance through local breakout solutions and optimized PTT traffic management across North America, Europe, and APAC. Whether you’re deploying PoC for logistics, security, emergency services, or enterprise applications, our IoT SIMs and connectivity solutions ensure you get the best possible service levels.

This article was curated by Jan Lattunen, CCO Simplex Wireless

About the Author: Jan Lattunen manages Sales and Marketing for Simplex Wireless. Jan has 20 years’ experience in working with SIM card technology and was involved in launching the eSIM in North America with major carriers and OEMs. His expertise in telecommunications is around SIM cards. On a personal note, Jan is a family man and avid cyclist with advocacy for safety in the roads. You can connect with Jan on https://linkedin.com/in/JanLattunen