We provide phone system sales and installation to small and medium size businesses in the San Francisco Bay Area, Los Angeles, Sacramento, and San Diego.

Avaya

Business Telephone Systems is a proud provider of Avaya phone systems and telecommunications products. A global leader in business communication systems for companies of all sizes, Avaya is well known for producing some of the most reliable and trusted business phone systems on the market. 

Whether you are looking to completely replace your existing phone system or just need troubleshooting support with a problem, Business Telephone Systems can help. Our expert team of technicians provides complete Avaya phone system installation, programming changes, upgrades, maintenance, and even training for your staff. Contact Business Telephone Systems today for a free professional consultation, and find out how an Avaya business phone system can help your business communicate more effectively.

Avaya IP Office

Avaya IP Office

Enabling greater productivity across your business – without adding people or substantially increasing costs – is an imperative every small business must embrace t... [More]

Avaya Partner

Avaya Partner

Partner Advanced Communications System (ACS) is a small business phone system that provides the reliability and simplicity of traditional telephony with the advanced f... [More]

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Areas we serve in the San Francisco Bay Area include: San Francisco, Oakland, San Jose, Hayward, Santa Clara, San Mateo, Fremont, Pleasanton, Sunnyvale, Berkeley, Walnut Creek, Concord, Livermore, Santa Rosa, Napa, Sacramento, Folsom, plus all the other cities and towns.

Areas we serve in the Los Angeles Area include: Los Angeles, Downtown LA, Long Beach, Glendale, Pomona, Torrance, Pasadena, Palmdale, Burbank, West Hollywood, Santa Monica, Torrance, Van Nuys, Santa Clarita, Lancaster, Inglewood, Norwalk, plus all the other cities and towns.

Areas we serve in the Sacramento Area: Sacramento, Citrus Heights, Elk Grove, Folsom, Galt, Isleton, Rancho Cordova, Antelope, Arden-Arcade , Carmichael, Del Paso Heights, Fair Oaks, Florin, Foothill Farms, Gold River, Hagginwood, Herald, La Riviera, Laguna, Locke, Natomas, North Highlands, Orangevale, Parkway-South Sacramento, Rancho Murieta, Rio Linda, Rosemont, Vineyard, Walnut Grove, Wilton, plus all the other cities and towns.

Areas we serve in the San Diego Area: San Diego, Carlsbad, Chula Vista, Coronado, Del Mar, El Cajon, Encinitas, Escondido, Imperial Beach, La Mesa, Lemon Grove, National City, Oceanside, Poway, San Diego, San Marcos, Santee, Solana Beach, Vista plus all the other cities and towns.