New York's Avaya Phone System Experts

Callifi is an independent Avaya service provider — not an authorized Avaya reseller. What this means for you: we repair, maintain, program, and support every Avaya system without being tied to Avaya's sales quotas or product roadmap. Our technicians have years of hands-on experience with Avaya platforms and we stock parts for legacy systems that Avaya itself no longer supports. We also offer vendor-neutral migration advice when your Avaya system reaches end-of-life, giving you honest guidance that an authorized dealer may not. Our office is at 16 East 40th Street in Midtown Manhattan and we service all five boroughs, Westchester, Long Island, and Northern New Jersey.

Absolutely. While Avaya discontinued the Partner ACS in 2010, it remains one of the most widely installed business phone systems in New York. We maintain a stock of Partner ACS parts, modules, and handsets (6, 12, 18, and 34 button phones) and our technicians are highly experienced with the platform. We also offer clear migration paths when you're ready to move to a modern system.

We offer same-day emergency support with on-site service throughout the NYC metro area. During business hours, call us and a real person picks up immediately. After hours, leave a message and we'll return your call first thing the next morning. For on-site visits, we typically dispatch a technician within 2-4 hours depending on your location.

Yes. We install, configure, maintain, and upgrade Avaya IP Office systems including the IP Office 500 V2 and Server Edition. Services include SIP trunk configuration, voicemail Pro setup, expansion module installation, firmware updates, and integration with third-party applications and CRM systems.

We specialize in migrating NYC businesses from Avaya (and other legacy systems) to modern hosted PBX. We keep all your existing phone numbers, replicate your call routing and extensions, ship pre-configured phones, and handle training. Most migrations take 3-5 business days with zero downtime. We also offer ongoing 24/7 support after migration.

Yes. We provide on-site Avaya service throughout Manhattan, Brooklyn, Queens, the Bronx, Staten Island, White Plains, Yonkers, New Rochelle, Westchester County, Long Island (Nassau and Suffolk counties), and Northern New Jersey. We also offer remote support for businesses anywhere in the tri-state area.

Yes. In addition to Avaya, Callifi services NEC (SL2100, SV9100), Panasonic (KX-NS700, KX-TDE series), Mitel, ShoreTel, and Nortel/Norstar systems. We also provide internet services, structured cabling, elevator phone replacement, and complete hosted PBX/UCaaS solutions.

Repair costs depend on the issue and system type. We provide free phone assessments to diagnose the problem before any work begins. For ongoing coverage, we offer maintenance plans that include 24/7 support, proactive monitoring, and priority on-site service. Call us at (212) 423-1234 or request a quote online for specific pricing.