The flexibility and modern technology found in Grandstream business phone systems make them a perfect fit in businesses of all sizes. Oakland Business Phone Systems is proud to serve the Oakland, California area with equipment, support, programming, and repair for Grandstream business phone systems. If you’d like to purchase and install a new Grandstream business phone system, you’re thinking about expanding or upgrading your current system, you’re experiencing issues, or you’d like professional support, maintenance, or repair, we can help.