The Basics of Getting Started with SIP Trunking

SIP trunking uses the internet connection to replace copper cables & analog systems. Instead of utilizing analog to place and receive calls over the PSDN, the SIP trunking uses an IP network to do so.

Many businesses utilized a PBX and key system also with outdated ISDN connections. This hardware links to a PSDN from the outside & then serves as an inner branch system, connecting new employees’ phones to each other and also the PSDN.

Because a sip connect permits both data & speech to be sent over the single broadband line, it improves the capacity of such a phone system. SIP’s most significant feature is that its information moves across an IP network, that might be a private LAN or perhaps the open internet.


To set up a SIP trunking system, you’ll need three things:

  • An ITSP (Information Technology Service Provider). Customers still require a mobile service provider, and instead of a standard mobile service provider, customers now require an Internet Phone Service Provider.
  • A PBX (private branch exchange).
  • The PBX might be a traditional analog type or a contemporary digital type, and it should be SIP compliant (a SIP gateway). The connection between both the ITSP as well as the PBX is managed by the gateway.

What to Look for When Buying a SIP Trunking System

When selecting any SIP trunking system, there are numerous important aspects to consider.

If the business is not up and running at a vital time of the day or the night, it’s vital to know that help is accessible 24 hours a day, seven days a week.

Bandwidth Requirements

Since the SIP product uses an internet connection, organizations must take into account all of the gear that is linked to that network, like phones, desktops, laptops, and tablets.

A reputable SIP provider will be able to guide you through many equipment options that are available. Upgrading your PBX and key system to still be SIP compliant is one of these possibilities. In addition, they will provide SIP trunking. Choose one service provider who uses well-known, professional, name-brand gear.

The security of a SIP trunking system is crucial. Without the need for a firewall, no firm would wish to engage with both the public internet. Examine contracts carefully to confirm that now the SIP supplier assumes full responsibility in the event of a denial of service, data loss, or toll fraud.

Network Architecture Work with a supplier to develop a customized, quick, dependable, and secured solution for the company.

Converting the PSDN to a SIP is a simple process.

Many of the processes involved in switching from PSDN to the SIP are the same as for some other telecom transition. SIP trunking suppliers provide number portability, which allows enterprises to maintain their existing phone numbers.

Most suppliers would advise businesses to use temporary phone numbers to confirm that the connection mainly works and also to allow the numbers enough time to transfer.

Because corporate firewalls must frequently be adjusted to operate with a SIP trunking team, businesses should include their network switching team immediately as they decide to use a SIP solution.

Cost Savings

When compared to conventional PSDN, SIP trunking is a very less costly voice option. SIP trunking has a considerably greater return on investment since it eliminates the costs of establishing & maintaining permanent copper wire systems.

Share your love
Christophe Rude

Christophe Rude

Articles: 15890

Leave a Reply

Your email address will not be published. Required fields are marked *