San Marcos Phone System Installation & Repairs Carlsbad, San Diego

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Southern California For 25 Years!

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Voice Over IP (VoIP) Phone Systems

Our experts are C7 California State licensed contractors. We specialize in the sales, installation and service of leading industry brands with a long history of success, such as Avaya and Nortel.


Our technicians will troubleshoot most brands of older phone systems, such as Merlin, Nortel, Partner ACS, and Definity, and make replacement recommendations.

  • Avaya Voice Over IP (VoIP) Phone Systems

  • Older Phone Systems, such as Merlin Magix, Partner ACS, and Definity

  • Salesforce Integration with your Phone System

  • Carrier Solutions

  • Paging Systems

  • Phone System Maintenance Agreements upon request

  • Phone System Training

Whatever the brand of your phone system, our experts can repair it for you. You can also get efficient repairs for Bogen Communications, Viking, and Valcom loudspeaker or paging systems. We also extend our communication solutions to call centers and various offices.


Contact us today to schedule a complimentary analysis of your business communications. We will provide you with a written estimate of how we can cost-effectively improve your system to make your business run more efficiently.

Southern Cal Telecom Inc. has been a trusted advisor for over 25 years. If you are seeking telecommunications solutions tailored to your company's specific needs, we would be more than happy to help!


Whether you wish to install a new or move an existing phone system, we are equipped to meet all your communications and networking needs.


Our technicians provide professional phone installation and service for VoIP and Hosted PBX phone systems, and paging systems. We have the expertise to design, install and maintain the system that is right for your company.

Professional Phone Systems

Troubleshooting Older Phone Systems Highly-Qualified Technicians Avaya

Our knowledgeable professionals have a thorough understanding of major carriers, such as COX Communications, AT&T, Telepacific and XO Communications. We are able to integrate your enterprise or wide area network using MPLS or other networking solutions based on your business’ needs.

Phone Systems

Dependable & Knowledgeable Service

Phone System Services

Experienced And Highly-Qualified Technicians