We specialize in used & refurbished business phones for existing phone systems

Avaya Partner

Picture of Avaya Partner ACS System 3X5

Avaya, formerly known as Lucent and AT&T, has been manufacturing innovative and reliable communications systems for decades. Avaya has created the Partner Advanced Communication System (ACS) which encompasses many of today's modern technological advancements. The Avaya Partner ACS telephone system will allow you voicemail* with built in auto attendant, caller ID, remote access, hold, intercom, and paging. According to Avaya, over 1 million businesses worldwide use the Partner ACS telephone system.

Small and large businesses will benefit greatly from the reliability, flexibility, and large number of features that the Avaya Partner ACS phone system offers. Helping you stay connected to your customers and employees is priority number one at Avaya, and Business Telephone Sales is proud to offer used and refurbished Avaya Partner ACS telephone systems to small and large businesses at the best prices on the market. Business Telephone Sales sells used and refurbished Avaya Partner ACS Processors Release 3.0 and higher, ACS 308EC expansions, and Partner ACS telephones.

Shop All Avaya Partner Advanced Communication Systems

With the help of voicemail and music on hold the Avaya Partner phone system ensures accessibility will be optimized at all times, 24 hours a day, seven days a week. In order for your business to thrive, customers and employees must be able to get in touch with you easily, quickly and without having to wait. Problems with your phone system can be disastrous to your bottom line. Customers become frustrated and impatient when they have trouble getting through, or are kept on hold for too long. When this happens, they may hang up and turn to one of your competitors. Also, your employees must be able to connect to you or other employees without interruption or waiting; this could also lead to problems. With an Avaya Partner phone system, these situations will be avoided.

AT&T Partner phone systems are designed specifically for small businesses. There may be phone systems on the market with more capabilities, but these other phone systems cannot compete with an AT&T Partner phone system based on price and quality.

Business Telephone Sales has been supplying businesses across the country with high quality Avaya Partner ACS telephone systems for over twelve years. In addition to our full line of Avaya Partner phone systems, we also offer systems from such great manufacturers as:

We thoroughly test each and every telephone that we refurbish and offer a 30 day warranty on all our equipment. Contact us at or call 1-800-396-9699 to speak directly with a Business Telephone Sales representative for more information regarding our used and refurbished telephones.

*There are a variety of Avaya Partner voicemails, to view our in stock voicemails and read about their many capabilities click here.

To View Avaya Partner Telephone Systems Click Here

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