What is Mobile SIP Trunking? How it Works and Its Benefits for Businesses
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With the Session Initiation Protocol (SIP), businesses can deploy their PBX systems to the cloud. Mobile SIP Trunking, combined with VoIP, is the foundation of most operating PBXs. This article will detail Mobile SIP Trunking, how it works, and the benefits it brings to your business.
What is Mobile SIP Trunking?
Mobile SIP Trunking operates using the SIP protocol on a VoIP platform, supporting mobile numbers from Viettel, Mobifone, and Vinaphone to connect to an IP PBX. This technology transforms mobile numbers into actual PBX numbers. Outgoing calls from any phone will display a unique number on the customer’s phone screen.
- How SIP Trunking Technology Works
- A traditional telephone system consists of the following three parts:
- PBX (Private Branch Exchange): the on-site system that manages your calls.
- PRI (Primary Rate Interface): the lines connecting calls to the PSTN.
- PSTN (Public Switched Telephone Network): the network that routes calls to their destination.

Benefits of Mobile SIP Trunking for Businesses
Now that you understand how Mobile SIP Trunking works, let’s consider the benefits it brings to your business.
Optimized Communication Costs
Think about your monthly phone bill. Now, subtract 70% from that amount. The remaining amount is exactly the cost of your phone after using Mobile SIP Trunking. Here are the reasons for this significant cost reduction:
No need for expensive hardware
Avoid installation and maintenance costs
No service interruptions during natural disasters
Eliminate worries about installation and technical changes, allowing you to focus on customer service.
Easily Scalable PBX
“OK, PBX costs have decreased, but my company is growing, so how do I upgrade my phone system? How much will the upgrade cost?”
That’s a legitimate and practical question. You don’t want to change your entire phone system when you have more employees or open a new branch office. When you use Mobile SIP Trunking, everything from regular calls to meetings happens over the internet. This means you don’t need to buy more lines or set everything up from scratch; you simply expand your service package with a SIP provider.
Unified Communications
SIP helps your PBX achieve consistency across all communication channels. Instead of switching back and forth between different channels, you can focus on unifying and managing them on a single channel.
The result of unified communications is improved call center performance. Whether you’re a single office with 10 people or have hundreds of employees worldwide, everyone can be reached through a device everyone owns – their smartphone.
Improved call quality
- Landline phones sometimes leave you when you need them most. Power outages, system failures, or bad weather aren’t things you can plan for.
- Poor quality calls or having to turn away customers when problems arise are not a good option.
Fortunately, Mobile SIP Trunking ensures a way to receive calls even in such unpredictable situations. This is made possible by its redundancy feature, which automatically reroutes your calls to other locations or employee mobile phones.
Enhancing the Customer Experience
Finally, if you’re worried about mastering new technologies and training employees, you can relax.
Businesses can manage everything about their SIP account from a simple interface. The SIP provider will ensure the PBX system is set up and working properly. You can use it to manage your entire enterprise phone system, such as call routing, extensions, adding call streams, etc.
Which Businesses Should Deploy Mobile SIP Trunking?
Companies currently using on-premises PBX systems can leverage the system to deploy SIP Trunking, bringing the PBX to the cloud.
Larger companies may be more hesitant to switch to SIP. This can seem especially challenging if they have thousands of employees across multiple countries or continents. It makes the transition to SIP impossible without service disruptions and costly billing. However, the longer you delay the switch, the more expensive it will be to maintain your business’s communications operations in the long run.
- SIP Trunking allows you to:
- Interact, video chat, messaging, conference calls, etc.
- Connect with anyone inside or outside your company instantly, regardless of their location or technical setup.
- Use your preferred device to make important calls by turning your laptop or tablet into a softphone.
- Integrate all your communication channels.
Whether you’re looking for a phone service for a small business or a large corporation, moving your phone calls to the cloud will be beneficial.
How to Deploy SIP Calls on Smartphones
Apple provides developers with tools to integrate supporting applications into phones, creating a smooth and consistent interface for iPhone users. This means the SIP Provider will assist you in installing the voice calling application on your smartphone.
For Android users, Google provides users with integrated settings to register their devices with the SIP provider. They also provide ways for developers to create familiar calling interfaces that users enjoy.
Benefits of Making SIP Calls on Personal Phones
Employees can answer calls using a single device with multiple numbers, such as personal and work numbers.
- Separate personal calls from work calls.
- Increase availability and efficiency in areas with limited coverage.
- High-quality calls thanks to wideband audio codecs.
Get Ready to Switch to Mobile SIP Trunking for Your Company
As we discussed above, Mobile SIP Trunking was created to replace the role of outdated PRI technology. Continuing with a traditional telephone system is a costly decision.
If you use a PBX today, you can provide voice service to your entire building using SIP Trunking. If maintaining all your equipment is costly or you are paying for call capacity beyond your limits, SIP is a great option to consider.
Planning to expand your office or add more business locations? SIP scales to your needs!
And if all you’re looking for is the reliability of a cloud-based telephone system centralized in a simple interface, then you’re definitely ready for SIP.
If you need to set up a SIP-based PBX system or require consultation on any issues related to your communication system, please contact OMICall.
VIHAT TECHNOLOGY Co., Ltd
Headquarters: ViHAT Building – 06 Street No. 16 (Him Lam Residential Area) – Hiep Binh Chanh Ward – Thu Duc District – Ho Chi Minh City
Hanoi Branch: Floor 15, LADECO Building, 266 Doi Can, Ba Dinh, Hanoi
Cambodia Branch: Thida Rath #154 St. 33MC, Sangkat Steung Meanchey, Khan Mean Chey, Phnom Penh
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