I answered call - noone responded, just hung up.
TELSTRA has a lot to answer for - they can stop this

Caller: A dodgy lady.

!!!SCAM ALERT!!! Very suss from the onset and throughout. Spoke with a woman whom claimed to be from Telstra. She advised that a technician needs to come out and wanted to know our address and a suitable time. I called her out by telling her that if she's from Telstra then she should know our address. The call ended with her saying the Tech would call us the following Monday for our address. We have received a few call from this number however they hang up as soon as we answer.

Telstra scam, after personal details, which telstra would have.

Scammer/telemarketer. Lady asked to speak with our IT Manager (who doesn't actually work for us but our partner company). I told her he was out for the day and asked her to leave a message. Didn't want to leave a message and said would call back tomorrow (which is a Saturday and the office is closed). Finally got a name from her and an apparent company, Avaya and she gave me another phone number that was completely different to the one she called on. If we used Avaya, she would've known our IT manager's name and number and the company he works for.

just got call. the other side hung up.

Caller: No voice.

I answered with my business name. No voice. I hung up on them. Checked out here. Now blocked. I hate scammers. Telstra can put a stop to this, but are too happy to take these bastard's money.

This phone no. has just called our office but it's not be answered because the phone screen showing it's unavailable. We guess that's a scammer.

Hung up after i repeated our company greeting a second time.
These calls seem to listen for the word "hello" , so say good morning or afternoon when answering & they hang up.

Caller: Panasonic

Indian or like sounding lady called stating she was from "Panasonic" and wanting to make sure we had NBN by running a few tests - told her we are fine and terminated call.

They called and hung up straight after I answered.

repeated calls

Kept calling our company for one of our employees, only way the new he worked for us would be face book. I called back from private and they would not tell me what their company did just that they are now called impact. hahaha f*cking scammers

I called back number (02) 9037 2186 spoke to a woman who said company name is (02) 9037 2186.

They call and never leave messages, I called the number back from another phone and a Indian lady answered and told me the company was "Ïnsight" but when I asked her what they do she would not tell me and just wanted to know more information about me.