I used to work in telecommunication industry and mainly in supplier domain such as Nokia, and R&D background. As most of people did, when i came to Australia, I only knew the big telecom operators such as Telstra, NBN, Optus, etc and tried to apply opening there, but no good luck.
Actually there are quite a few of other similar industries and companies which I can apply if I knew these companies already. That's why I am posting the information here for later new comers reference.
Basically, I'd cover the following and you are welcome to share any more insights, suggestions and companies if you know under such category. As you may guess, I won't talk about Telstra, nbn, Optus, TPG, etc as I don't know
1. IP based secure communication industry, such as Air Traffic Management
a. Harris/c4i (Melbourne) - http://www.c4i.com/
2. Call Center Solution Provider Industry
a. Global Speech network (Sydney, Melbourne, NZ) - http://www.globalspeechnetworks.com.au/
b. Salmat (Melbourne, Sydney) - http://www.salmat.com.au/
c. DT technologies(?)
3. Telecom Startup Companies
a. CellOS software ltd. (Melbourne) - http://www.cellossoftware.com/
4. Consumer and Access node product
b. Netcomm Wireless (Sydney, Melbourne) - http://www.netcommwireless.com/
Please search company in below detail section to understand more.
====== Detail ============
Harris/c4i (Melbourne) - http://www.c4i.com/
Product:
1) Safety communication system
2) Aviation related (Air Traffic Management system)
Key Technologies/Skills:
1) Telecom: VoIP: SIP, SDP, RTP/RTCP, Codec, PJSIP, QoS, PCM, Streaming, Broadcasting
2) Telecom: Analog/Legacy: QSIG, ISDN, No.5 signalling, Radio (4wire E&M, RS232 interface)
3) OS and Processor: Windows 7, Linux/centOS, Embedded System, DSP, x86
4) Programming: C++, QT, Java, cross platform programming
Developer, Tester, System Engineers (customer interface)
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CellOS software ltd. (Melbourne) - http://www.cellossoftware.com/
Product:
1) 3G, 4G LTE protocol probe
2) Wireless security algorithm
Key Technologies/Skills:
1) Telecom: LTE core (EPC, PGW) and Access node (eNB), Sx interface, Radio protocols (RRC, RLC), S1-AP, X1AP, etc
2) OS and processor: Linux/Redhat, x86
3) Programming: C++/C, Java, Python (for scrip)