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Introducing CriticalLinc™. The network you trust has gone mission critical.

4G Advanced LTE network goes beyond reliable.

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☝    Get the team connected: Buy an XP8 for $99 w/ activation and another one at no cost with a second activation. Learn More>

The network you trust has gone mission critical.
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We've built redundant network data centers in Birmingham and Atlanta with backup power systems in each location.

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Each cell site has an emergency generator or backup fuel cell to keep the power running for days during an outage.

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We secured the CriticalLinc network in lockstep with Southern Company's multilayer, 24/7 IT security systems.

Mission critical Push To Talk that just won't quit.

Icon of Chat Bubble Basic Linc PTT

Our Basic MCPTT service offers the outstanding PTT features you're accustomed to as well as some new ones. For instance, the new Group List feature lets users create up to 10 lists of groups to scan, while the Priority Group feature sets the talk group that will engage before the other groups.

One-to-one Calling:

  • Broadcast Group Calling
  • Private MCPTT Calls
  • MCPTT Call Alert

Group Calling:

  • MCPTT Calls to Enterprise Groups
  • Group List
  • Talk Group Scan
  • Priority Group
  • MCPTT Calls to Personal Groups
Learn More

Icon of Lightning Bolt High Performance MCPTT

In addition to the features of Basic Linc PTT listed at left, our HighPerformance MCPTT option offers a number of outstanding features – all for just an additional $10 per line per month.

Emergency Alarm and Emergency Call

Using the orange emergency button on the side of a Southern Linc handset, users will activate an emergency alarm when the emergency button is pressed and held for three seconds.

Linc Map

Displays the locations of other Linc PTT users who are part of the same enterprise talk group on a map.

Linc Message

Allows users to send text messages with pictures, video and voice recordings via MCPTT without leaving the Linc PTT application.

Learn More
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Rugged phones for the most demanding situations.

Mission critical situations demand smart communication, connectivity, and flat-out ruggedness. SONIM phones stand out when all other devices fail. The XP8 and XP5s are the toughest, most reliable phones that money can buy. Their performance in punishing environments earned them their spot in the CriticalLinc LTE lineup.

Pick a Phone
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Get Push To Talk on any smartphone with Linc PTT.

Linc PTT is our smartphone Push To Talk (PTT) app that lets Android and iOS smartphone users communicate with each other and Southern Linc phones.

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Coverage Icon We've got the Southeast covered.

Our mission critical LTE coverage is designed to be highly reliable. LTE network coverage is similar to iDEN coverage, but not exactly the same. Use the interactive map below to see the coverage in your area.

Coverage depiction does not a guarantee data speed or service availability. Coverage may not be available everywhere and is subject to change.

View Our Coverage