How does HD telephony work?

HD telephony enables the highest possible voice quality currently available for landline and VoIP calls and is automatically included in all sipgate plans.

How does HD telephony sound?
The simple answer: Clearer, fuller, and more natural. The technical background: Unlike conventional telephony, a larger frequency spectrum of the voice is transmitted. This doesn't require any additional bandwidth from your internet connection.

What do you need for HD telephony?
You don't need to make or adjust any settings in your sipgate account. If your hardware meets the requirements, you'll automatically make calls in HD. For this, you need HD-capable phones or endpoints. Specifically, this means that your VoIP phone must support the required codec (G722 and Opus) that can transmit voice in HD quality. Many phones already support these codecs, but you may need to adjust the endpoint's configuration.

You meet all requirements but don't hear a difference?
A phone call always goes in two directions. If the person on the other end of the line doesn't have HD telephony, you'll automatically call in normal voice quality. However: Many telephony and device providers have already switched to HD or are working on it. Therefore, it can be assumed that HD telephony will become the absolute standard in the near future – and with sipgate, you're already perfectly set up for it.