South Australian Telecommunications Pty Ltd phone 53 Orsmond St Hindmarsh, South Australia 5007 map Telstra Business Centre phone Level 1, 215 Port Rd Hindmarsh, South Australia 5007 map if (!IN_DEV) { ?> } ?> Telstra Business Centre phone Level 1 / 215 Port Rd Hindmarsh, South Australia 5007 map