Discover the flexibility, functionality, and crystal-clear voice that make BizNet's SIP Trunk Service a practical solution for your business.
Whether you're upgrading an existing PBX or planning a complete communications refresh, SIP trunking provides a scalable foundation for modern business communications.
How Does it Work?
Our SIP Trunks provide an efficient and cost-effective way for businesses to design a suitable multi-line solution without being locked into purchasing channels in blocks, delivering a solution that is more efficient, scalable, and affordable.
Sip Trunk Advantages
Choice and Control
Our SIP Trunks provide you with essential choices that many other providers don’t. The result? A reliable solution, built to work the way you expect.
Call Routing
- Public - Calls can be routed over the public Internet.
- Private - Call traffic is passed over BizNet’s redundant, cutting-edge fiber network.
Bandwidth Options
- Dynamic - Voice and data share the same circuit, with priority given to voice traffic.
- Dedicated - provides dedicated VLANs for voice and data traffic, so internet capacity is never impacted by call volume.
Why Businesses Choose SIP Trunks
Affordable
SIP Trunks enable the consolidation of voice and data traffic onto a single circuit, eliminating the need for multiple lines or circuits.
With a PRI, channels must be purchased in blocks of 23, which often results in overbuying. To provide phone service to each employee, an office of 40 employees will need to purchase two T1 PRI blocks of 23, exceeding the actual requirement. SIP Trunks, however, can be purchased in single call increments. By determining peak call volumes, you can purchase exactly what you need. For instance, in an office of 20 employees, if the maximum number of employees on the phone at any given time is 8, you need only purchase 8 SIP Trunks instead of 20 individual lines.
Additional savings come from:
- Reduced hardware
- Elimination of maintenance fees
- Reduced long-distance costs
Flexible
BizNet’s SIP Trunks are designed for flexibility.
- Can be configured to work with any phone system.
- Purchase additional call sessions as needed.
- Customize your service with:
- Reservation-less
- Caller ID
- Call Waiting
- Direct Inward Dial (DID)
- Direct Outward Dial (DOD)
- E911
Scalable
- As your business grows, so can the capabilities of your voice communications system.
- If you route your SIP Trunk over our private network, your options become virtually limitless. You can tailor your SIP Trunk bandwidth to precisely the size you need, ranging from 1 Mb to 1,000 Mb (GigE) and beyond.
Versatile
- The transition to SIP Trunks is seamless; they can be configured for use with any phone system so that you can keep all of your current features.
- When you move away from your premise-based phone system, you can combine your SIP Trunk with our Hosted VoIP Solution to achieve the ultimate in flexibility and free up some phone closet space.
FAQ about SIP trunking
Can I keep my existing PBX phone system?
In many cases, yes. One of the biggest advantages of SIP Trunking is that it allows businesses to continue using a compatible IP-enabled PBX while replacing expensive traditional phone lines. This lets you modernize your communications without investing in an entirely new phone system. If you're planning a complete migration to the cloud, our Hosted VoIP Phone System may also be worth considering.
How many SIP channels does my business need?
The right number depends on how many simultaneous calls your business handles, not the number of employees. For example, an office with 30 employees may only require 8 to 10 concurrent call paths if everyone isn't on the phone at the same time. A professional assessment can help determine the appropriate capacity while leaving room for future growth.
What's the difference between SIP Trunking and Hosted VoIP?
Although both use internet technology to handle phone calls, they serve different purposes. SIP Trunking connects your existing PBX to the public telephone network, while a Hosted VoIP solution moves your phone system to the cloud, eliminating the need for on-premises PBX hardware. If you're unsure which option best fits your business, read our comparison of SIP Trunking vs. VoIP.
Is SIP Trunking secure?
Yes, when it's properly configured. Modern SIP Trunk providers support encryption, secure authentication, and fraud prevention features. However, security also depends on your network infrastructure. Firewalls, regular software updates, and ongoing monitoring help protect against toll fraud, spoofing, and unauthorized access.
How much internet bandwidth does SIP Trunking require?
A typical high-quality voice call uses approximately 100 Kbps in both upload and download bandwidth. However, bandwidth is only part of the equation. Network congestion, poor Quality of Service (QoS) configuration, and outdated networking equipment can all affect call quality.
If your business experiences dropped calls or poor audio, our guide on Why Your VoIP Phone System Is Running Slow explains the most common causes and solutions.
What happens if my internet goes down?
Because SIP Trunking relies on an internet connection, calls may be interrupted during an outage unless redundancy has been built into your communications strategy. Many businesses use automatic call forwarding, redundant internet connections, or failover routing to maintain business continuity.
If uninterrupted communication is critical to your operations, we can help design a solution that minimizes downtime and keeps your business reachable during unexpected outages.
Can SIP Trunking support remote and hybrid employees?
Yes. SIP Trunking can support remote workers when paired with compatible PBX systems and secure network configurations. Many growing businesses also choose to transition to a Hosted VoIP Phone System for even greater flexibility, allowing employees to make and receive business calls from virtually anywhere.
When should a business choose SIP Trunking instead of Hosted VoIP?
SIP Trunking is often the better choice for businesses that already own a modern IP-PBX and want to reduce phone costs without replacing their existing equipment. Hosted VoIP is typically a better fit for organizations looking to eliminate on-site PBX hardware, simplify management, and support a distributed workforce.
If you're still evaluating your options, our team can assess your current phone system and recommend the solution that best fits your business goals.
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