What is a SIP Channel?

A SIP Channel, or SIP Trunk, refers to the SIP Line which a phone call is carried over. There are lots of names but they are basically the same thing.

You will need one SIP channel for each concurrent call. At SIPcity all accounts are assigned two channels by default, with each Calling Plan having an allocated quantity of SIP channels and numbers.

SIP Channels don’t require physical wiring, these are a virtual phone line, and SIP trunks use your internet connection to connect to our SIPcity network to connect calls to the receiving phones.

Individual Calling Features uses SIP Channels to route the calls, eg Hold uses one channel, and the Auto Attendant uses one channel. A Call Queue can use multiple channels, so if you want six callers in your Call Queue, you will need six SIP Channels.

What is the Maximum Number of Channels we can have?

There really is no maximum number of SIP Channels. Your SIP trunk can handle a potential unlimited number of SIP trunk channels, although each channel requires a certain amount of internet bandwidth, depending on factors such as the VoIP codec being used. Certain codecs require less bandwidth per call. Your internet connection is the limiting factor for how many SIP trunk channels you can have, and here in Australia as we see more businesses move from the traditional ADSL, we are seeing improvement in the quality of the internet connection and subsequent VoIP Calling Quality. We do recommend about 110kbps of internet bandwidth per SIP trunking channel. So, if you have a 1.5mbps internet connection, your maximum number of channels would be about 10. As the SIP trunk itself has no maximum number of channels, your SIP trunk is capable of handling as many channels as you need. The limiting factor here is your internet connection, since your internet bandwidth is what limits how many SIP channels you can have connected at once. You can use this VoIP bandwidth calculator if you want to precisely calculate your bandwidth needs. If you know how many channels your internet connection can handle and you’re wanting to switch to a Business VoIP Solution then reach out to the SIPcity team or explore our SIP Trunk pricing.

Why do we need to switch to SIP Trunks?

Australia has been physically removing copper wire from the ground and installing the National Broadband Network (NBN) for the provision of internet across the country. 

This means your traditional “Land Line” is obsolete and the replacement alternative is to use SIP, or VoIP. Some people prefer the term ‘SIP trunk line,’ because the terminology is more consistent with traditional telephone lingo. Each connection on the legacy PSTN was called a “line” and referred to the copper wire connection between two phones. 

The move to SIP or VoIP services provides a more flexible solution for your business and will ultimately cost less with a greater ROI. You may need to upgrade your physical handsets, or desk phones, to IP based handsets. By implementing new IP phones, you no longer need a physical PBX in your business, which means that piece of hardware that was on the wall in a cupboard, can now be used as a boat anchor! The PBX is now in the Cloud, and your can do all your “Switchboard” functions online, and set up and manage all your phones from the same system.

Our team can answer any questions you have on your move to the Cloud PBX and give you the assurance that it’s going to be great for your business.