On-Premise CommunicationsReliable On-Premise Phone Systems
Not every business is ready for the cloud — and that's perfectly fine. On-premise systems keep your communication infrastructure, hardware, and data right inside your facility, fully under your control.
On-Premise & VoIPPerformance You Can Depend On
For organizations that prioritize data control, work with limited internet bandwidth, or simply prefer the reliability of a locally hosted system, on-premise remains a smart, future-proof choice.
Gaynor Telesystems has designed, installed, and supported on-premise business phone systems across Northern California for five decades, from new VoIP-capable systems to smooth upgrades from legacy hardware.
Custom Phone SolutionsSystems Designed for Your Business
A five-person office has very different needs than a multi-site enterprise with hundreds of extensions. We skip the one-size-fits-all approach, studying your operations, call volume, growth plans, and budget before recommending anything. Our systems support every device type your team relies on:
Call Routing & Voicemail
Intelligent routing, auto attendant, and full-featured voicemail that get callers where they need to go.
Unified Communications
Voice, messaging, and presence unified across desktop, mobile, and browser for one seamless experience.
Call Recording
Capture and archive conversations for quality assurance, training, and compliance requirements.
Mobility Apps
Take your extension anywhere with find-me / follow-me and full softphone apps for any device.
Contact Center
Queues, reporting, and agent tools to run a polished customer-facing operation entirely in-house.
Security Integration
Ensure your phone systems are full integrated with your security systems in one seamless solution.
Proven VOIPMitel
An authorized partner since 2007, we've deployed Mitel across businesses, school districts, and government agencies. The architecture is easy to deploy and maintain, your own team handles adds, moves, and changes without a service call.
Unified Communications
Call Recording
Conferencing
Mobility
Contact Center
Mass notification and crisis response
A multimode notification solution with overhead paging and wide-range coverage across desktops, mobile devices, and PA systems, adding a critical layer of safety communication for schools and public facilities.
Unified CommunicationsE-MetroTel
E-MetroTel offers a modern communications platform with a smart migration path. UCX delivers powerful, cost-effective unified communications for organizations that want modern features without a forced move to the cloud. It runs existing NEC, Nortel, and other legacy digital phones right alongside new SIP and IP devices.
Legacy Phone Support
In-House Engineering
SIP Trunking Savings
Keep what works. Add what's next.
A phased, non-disruptive transition that avoids costly rip-and-replace upgrades. Your team keeps the phones and features they know while you gradually introduce VoIP, unified messaging, call recording, conferencing, and find-me/follow-me mobility.
Legacy system SupportNEC
Gaynor holds the distinction of being the oldest authorized NEC dealer in the country. NEC was our first product line in 1974, and we've supported these systems ever since.
While NEC exited the phone market in 2024, that doesn't make your investment obsolete. Our certified engineers continue full maintenance, repair, parts inventory, and support — and a smooth path forward when you're ready.
Maintenance & Repair
Parts Inventory
Keep Your NEC Phones
Doors Open
Gaynor is founded — with NEC as our very first product line.
ShoreTel Partnership
We become an authorized ShoreTel (now Mitel) partner, expanding into modern VoIP.
NEC Exits Market
NEC leaves phone systems globally — but local support doesn't have to stop.
Still Supporting You
Full support continues, plus a clear path to E-MetroTel, Mitel, or cloud when you're ready.
Why GaynorLocal Technology Partner
We're not a call center. We're your local technology partner with over 50 years of experience helping Northern California businesses find the right communication solution.
Factory-Certified Engineers
Certified installation, training, and support for the full E-MetroTel, Mitel, and NEC product lines — done right the first time.
50+ Years, Oldest NEC Dealer
The deepest legacy and on-premise knowledge in the region. When a system needs to keep running, experience matters.
Local Northern California Support
Ongoing support from a team that knows your business — the kind that makes upgrades feel effortless. No 1-800 hold queues.
Explore Your OptionsPhone Systems Built Around Your Business
Whether you're upgrading existing phone systems, replacing outdated equipment, or starting from scratch, our team can help you find the right on-premise solution.