SIP Trunking
That Just Works

Modernize Voice. Keep Control.
Replace PRI lines and legacy circuits with flexible SIP trunking — built on Vision Net’s owned fiber network and backed by direct engineer support.
Talk to a Voice Expert
Who SIP Trunking Is For
If your team already manages an on-prem or hybrid PBX and you’re looking to improve voice performance without a full migration, this is for you.

SIP trunking is a fit if you:

• Want to retire PRI or analog lines

• Need consistent call quality and uptime

• Run call-heavy operations or multiple sites

• Care about who controls the voice network

 

Not replacing your phone system yet? SIP still gives you a smart, cost-effective step forward.

What Is SIP Trunking?

SIP trunking connects your existing phone system to the public telephone network using IP instead of physical lines. Vision Net runs this over our regional fiber backbone — giving you:
Lower Costs
More Flexibility
Control Over Voice Performance
Why Vision Net SIP Trunking Is Different

Most providers rent the network. We own it.

 

That means:

• Regional fiber built for real-time traffic

• Local SIP routing + redundancy

• Fewer handoffs between carriers

• Low latency, reliable call quality

• Direct access to Montana-based engineers

• 24/7/365 monitoring from our NOC

 

This isn't a bolt-on voice product. It's network-native SIP.

Works With Your Existing Phone System
Vision Net SIP trunking supports most PBX platforms.
You keep:
• Your phone numbers
• Your call flows
• Your internal routing
You gain:
• Flexible call paths (not fixed lines)
• Easier multi-site scaling
• A clean PRI replacement
No rip-and-replace. No disruption.
Call Capacity That Scales With You
SIP lets you buy only what you use — then scale up or down.

Ideal for:
• Seasonal demand spikes
• Multi-location expansion
• Avoiding unused capacity costs

Supports logistics, finance, healthcare, public sector, and other high-volume call environments.
Get In Touch Today
Voice Quality Is a Network Problem
SIP is only as good as the network under it.

Vision Net delivers:
Fiber engineered for 
real-time apps
Consistent packet delivery + low jitter
Traffic prioritization options
Local monitoring + fast support
Clear calls. Fewer disruptions. Confidence that voice just works.
SIP Trunking vs Cloud Voice

Choose SIP Trunking if you want:

• To keep your PBX

• Full control over call routing

• Lower long-term cost

• Network-layer voice integration

Choose Cloud Voice if you want:

• To replace your PBX
• Minimal on-prem equipment
• Fully managed service

Vision Net supports both — we’ll help you decide.
Built in Montana. Trusted Across the Region.
Unlike national providers, Vision Net owns and operates the infrastructure locally.

That gives you:
• Faster resolution paths
• Engineers who know the network
• Clear accountability

Proximity matters — especially for voice.
Not Sure Which Voice Path Fits?
We’ll review your phone system, call volume, and network to help you decide.
FAQs
What do I need for SIP trunking? +

An IP connection, compatible PBX, and SIP credentials. We handle the rest.

Can SIP replace PRI lines? +

Yes — with more flexibility and less hardware.

Does SIP work best over fiber? +

Yes. Fiber delivers the low latency and quality SIP needs.

How many call paths do I need? +

We size this based on concurrent calls, not total phones.

Is SIP secure? +

Yes — when properly designed and monitored, it's a reliable, secure option.

Do I need new phones? +

Usually not. SIP works with your existing PBX and phones.

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