SIP Trunks and VoIP Gateways (To the Chagrin of Some…)

Jim Machi
VP of Marketing, Sangoma

From legacy infrastructure to VoIPEven though we hear over and over that the PSTN is pretty much gone, in reality, legacy infrastructure is still in use. I know this because we still sell the gateways for it. Certainly, VoIP and SIP trunking continue to grow, but for many companies, even today, this means a gradual transition, not a full-scale wipeout of legacy infrastructure and equipment. Why? Because what they have works. And what they have is already paid for (minus any maintenance contracts). So it makes sense to continue using legacy infrastructure like the PSTN and make an orderly transition off of it only when it makes business sense to do so.

Slow Migration from Legacy Infrastructure

This concept of a slow migration while still using the PSTN is anathema to some in the industry. It’s so passé, and it’s so boring to talk about. Let’s talk about 5G which isn’t even here yet! But businesses that are still using legacy infrastructure are the reality we have to face!

On the topic of migration away from legacy infrastructure, how does an enterprise know where to even? Many companies are moving to SIP trunks as a way to bring connectivity into the customer premise. SIP trunks can help enterprises move to cloud-based communications infrastructure over time. It’s certainly easier to upgrade and have flexibility with a cloud deployment. We have seen this ourselves in Sangoma when we switched some of our enterprise communications applications to the cloud. And along with these SIP trunks comes an enterprise SBC to protect the enterprise network from what might come down the SIP trunk. This all makes total sense for the IP network.

This is why we still need VoIP Gateways

But, as I said above, there will still likely be legacy infrastructure in the enterprise that works, that is paid for, etc. So business owners will want to use it. In this case, if you are using a SIP trunk or would like to, a gateway can be placed between the legacy equipment and the SIP connection to the network. This is why the gradual transition from legacy infrastructure to IP continues and will continue over time. And this is a key reason gateways continue to exist in the market and why Sangoma continues to offer them.

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