FreePBX, being a front end to Asterisk, allows setting multiple time periods under a single Time Group, usually for public Holidays and such, we call this Holidays - I know, so original
This article concentrates on Queensland, in particular Brisbane, Public Holidays, since only a few holidays vary between states, it will be easy for you to change to suite yours if you need to, likewise international readers, where many don't observe Show Days, ANZAC Day, or Easter.
Playing music on hold (MoH) on your phone system whilst your caller is waiting to connect to the person or department they are after, or whilst someone ducks off to get some information, is a given these days, no-one wants to sit there and listen to silence, or nothing but the sound of keyboard tapping for 5 minutes.
Am I still connected? Did they forgot about me? Hrmm... is this thing still working? C'mon aren't you done yet?
Configuring FreePBX to use a VoIP provider is usually simple and quick, but sometimes there's always one of the bunch that wants to be different in how they expect you to configure your Trunk, and Aussie Broadband (affectionately known as Aussie, or ABB) is one of them.
With ABB doing things differently, you'll find the usual way of setting up a SIP trunk in FreePBX wont work, and you'll probably go half insane trying to work out why.
To Host or not to Host - That is the question. Since the time SIP was commercialised, there has been a religious war raging, a fierce war with two staunch opponents - On-Prem (on-site) PBXers, and Hosted (off-site) PBXers.
There are benefits to both methods, it depends on what features you want, how many channels you need (in the world of VoIP, channels = lines), and how you are going to use the system.
As the new decade rolls around, CounterPath, the developers of the popular VoIP softphone X-Lite, have decided to force everyone off and onto their Bria platform, previously for commercial users, but now for everyone, if you try to run X-lite, you'll get an error telling you its now End Of Life and to pop over to CounterPaths website and download Bria Solo Free which is free for home and non-commercial use, and claim is a direct replacement for X-Lite.
In the age of NBN, where most POTS exchanges are being turned off (unless you're lucky enough to be in an NBN Wireless footprint where you get to keep your POTS line), SIP (VoIP) is your new and only option, so businesses are going to need to move towards SIP, and like traditional PBX's, that's where thing's get price crazy.
FreePBX, being a front end to Asterisk, allows setting multiple time periods under a single Time Group, usually for public Holidays and such, we call this Holidays - I know, so original 
Playing music on hold (MoH) on your phone system whilst your caller is waiting to connect to the person or department they are after, or whilst someone ducks off to get some information, is a given these days, no-one wants to sit there and listen to silence, or nothing but the sound of keyboard tapping for 5 minutes.
To Host or not to Host - That is the question. Since the time SIP was commercialised, there has been a religious war raging, a fierce war with two staunch opponents - On-Prem (on-site) PBXers, and Hosted (off-site) PBXers.
As the new decade rolls around, 
In the age of NBN, where most POTS exchanges are being turned off (unless you're lucky enough to be in an NBN Wireless footprint where you get to keep your POTS line), SIP (VoIP) is your new and only option, so businesses are going to need to move towards SIP, and like traditional PBX's, that's where thing's get price crazy.