A Complete Guide to SIP Trunking – AU Telecom

A Complete Guide to SIP Trunking

SIP stands for Session Initiation Protocol – an application layer protocol that enables you to run your phone system via the internet rather than traditional phone lines. Trunking is the network of phone lines that connects several users to a telephone network. SIP, or Session Initiation Protocol, is the procedure used to initiate a voice-over IP (VoIP) connection. It is an application layer protocol for establishing real-time audio and/or video sessions between two endpoints (phones, computers, etc.). SIP is the technology that establishes, alters, and ends sessions with one or more parties on an IP network, whether a two-way or a multi-party conference call.

What is VoIP?

VoIP services transform your voice into a digital signal that can be transmitted through the internet. If you dial a standard phone number, the signals are transformed into regular phone signals before reaching their destination. VoIP allows you to call from a computer, a dedicated VoIP phone, or a standard phone linked to a special adaptor. At AU Telecom, we offer a broad range of VoIP services so your business can have a powerful unified communication system.

SIP Trunking Benefits

SIP trunking is the best option for those looking to relocate their corporate communication on a small budget. The following are some major advantages a business can have when opting for SIP Trunking.

Compact Communication

SIP trunking enables you to utilize the same IP-based network for phone, video, and other forms of data transmission. Multiple, overlapping networks are no longer required (and paying for each). You no longer need to subscribe to separate voice and data services. Instead, you can use SIP trunking to create a strong infrastructure.

High Mobility and global approach

SIP addresses your company's demand for rapid expansion across many geographic regions. Your organization's geographic locations and remote workers can be integrated by merging voice and data into a single network. SIP's rapid scalability enables your firm to grow with exceptional flexibility if you open additional locations or hire full-time remote workers.

Increased Productivity

This advantage of a secure SIP trunking service is straightforward. Your employees may spend less time figuring out how to reach someone and more time doing important jobs. To assess usage and availability, you can also access unfiltered call logs and reports. This feature is useful for IT experts and company owners since it allows them to expand their phone system to meet the demands of their workforce.

No Costly Types Of Equipment

SIP trunking does not necessitate the purchase of extra hardware. With many other systems of telephones, your company may need to engage in costly hardware upgrades when phone lines are scaled. Adding phone lines or add-on services with a SIP provider is as simple as acquiring an extra handset and scaling your monthly service agreement.

Rapid ROI

In the case of many technological investments, firms are unlikely to see a return for several years. Investing in technology is sometimes risky because of the uncertainty of ROI. Still, SIP trunking is a more established technology with few upfront expenditures. You might observe appreciation sooner after the initial billing statement without a higher upfront investment.

Superior Call Quality

SIP trunks ensure adequate bandwidth for your concurrent conversations to function smoothly. This is true even during peak hours and if there is an unanticipated surge in call traffic. Calls with poor audio quality put customers off. If your calls occasionally have echoes or drop, you should improve your internet service and SIP trunking provider. VoIP issues do occur, but they may be avoided by adhering to industry best practices.

Backup Availability

Backup connections can be established over any Internet connection for business continuity. If the primary link to the SIP provider breaks, the SIP trunk can be registered to the provider using practically any solid Internet connection. This can help to reduce communications loss and enable backup telephony for emergency calls.

How does SIP Trunking Works

A SIP trunk is a virtual equivalent to an analog phone line. A SIP provider can join one, two, or twenty channels to your existing PBX system using SIP trunks – which enables you to make local, long-distance, and international calls over the internet. If your workplace has an on-premises PBX, a SIP trunk provider can connect to it and enable you to make outbound calls from your existing system with no limits on the number of consecutive calls.

Why businesses need SIP Trunking

Running your phone system using SIP Trunking is inexpensive, but it is not for everyone. Physical lines are no longer required. It also allows you to simply add extra phone lines or change your phone provider without causing interruptions or purchasing new gear. SIP trunking can help everyone, from micro-enterprises to giant corporations.

SIP Trunking Cost

You can expect to pay between $10-30 per month for each line depending on the calling plan. SIP trunks are sold in metered (pay-as-you-go) or unlimited plans. Account setup, support, and porting are often charged extra by some SIP trunk providers. At AU telecom, we offer a broad range and plans for SIP Trunking.

What is a SIP Trunking provider

The name "SIP provider" derives from the service "SIP trunking," which lets enterprises connect their IP-based PBX systems to the PSTN (Public Switched Telephone Network). Your SIP provider can connect one, two, twenty, or more channels to your PBX system, enabling you to make local, long-distance, and international calls over the internet. If your workplace has an on-premises PBX, a SIP trunk provider can connect to it and enable you to make outbound calls on your existing system with no limits on the number of concurrent calls. AU Telecom's SIP Trunking solution dynamically scales up and down to meet your traffic demands with limitless capacity. You can deploy abroad in minutes utilizing our easy self-service tools without depending on sluggish SIP Trunks providers.


When looking for a SIP trunking provider, you want a business that offers the functionality you want at a price that fits your budget while also providing excellent customer service. You must keep the following factors in mind:

  • Check for scalability and whether you can add and delete SIP Trunks as your needs change.
  • Understand what your failover system permits in the event of a power or network interruption at your site.
  • Check to see if the provider provides number porting for any existing phone numbers your firm has.

To use SIP Trunking, all you need is access to administer your Private Branch Exchange (PBX). Simply provide your SIP trunking provider's credentials to connect it to the cloud. Some PBXs may need further configuration. AU Telecom offers free help to get you up and running.

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