Granite EPIK: what it is, pricing and who it fits

Who this page is for

• You are comparing POTS replacement providers for several sites, and Granite EPIK came up.
• Some rooms have 5 to 8 copper lines, including alarm panels, elevator phones, modems or fax.
• You buy lines from Granite today, or you received a Granite notice.
• You want Granite’s own published facts before a sales call.

I have not tested EPIK myself. This page is based on Granite’s pages and an FCC public notice, linked in the sources. EPIK is one of the providers I work with, which is why the disclosure above applies.

What Granite EPIK is

Granite Telecommunications calls EPIK “a patented technology” and describes it as a Class 5 softswitch-powered edge device that replaces POTS lines (Granite). In plain terms, the box at your site acts like the phone company’s central office for your analog devices.

The product page uses both names: “Granite EPIK” and “EPIK Edge.” Granite describes EPIK as a managed facilities-based voice network (MFVN), the term fire codes use for a carrier-managed voice path.

How it works

From Granite’s EPIK Edge page:

• Lines: up to 8 analog lines per device. Larger needs are met with a second EPIK, an ATA or another solution.
• Cellular: 4G LTE with dual SIMs, which Granite describes as prepared for 5G.
• Wired: integrated Ethernet, and it can switch to broadband or Wi-Fi where available.
• Failover: cellular backup when primary internet is down, and intelligent failover to PRI.
• Battery: up to 24 hours on standby or 8 hours of use.
• Security: end-to-edge encryption for calls and faxes.
• Monitoring: 24/7 monitoring with automatic notifications for critical alarm and voice circuits.
• Deployment: turnkey managed deployment and installation nationwide, with minimal internal wiring.

For alarm signals, Granite holds U.S. Patent No. 12,250,339 for what it calls Alarm Protocol Relay, “an advanced latency compensation algorithm” for applications sensitive to latency and jitter (Granite).

What Granite says it supports

• Fire and security alarm panels
• Elevator voice circuits
• Blue light emergency phones
• Meters and SCADA systems
• Analog modems
• High-volume or long-form fax
• Auto-attendant and IVR features

Granite does not name ATMs or card terminals on the EPIK page. Its April 2025 testing release mentions interoperability with point-of-sale terminals and medical monitoring devices.

Pricing: what Granite publishes

As of October 2026, Granite does not publish an EPIK price list. Its EPIK page says:

• Pricing is consistent across the United States.
• Savings of up to 30% are possible, with no baseline stated.
• The monthly cost stays stable for the contract term.
• There is no upfront capital expense.

The page mentions a contract term without giving its length. Expect the quote to depend on lines per device, number of sites, term, installation and any extra monitoring. Compare it with your bill in the POTS cost calculator.

Listings, approvals and test claims

These are Granite’s statements. Your fire marshal or elevator inspector decides on your installation.

• California State Fire Marshal. Granite says CSFM approved EPIK for listing in 2022 as a POTS replacement device that can act as an MFVN.
• FDNY. Granite says the New York City Fire Department approved EPIK as an MFVN on November 23, 2022 (Granite).
• NFPA 72. Granite describes EPIK as NFPA 72 compliant as an MFVN solution.
• Network testing. Granite’s April 22, 2025 release reports 2.5 million calls observed over 24 hours, 99.98% of calls with mouth-to-ear latency under 200 ms, and service availability of 99.9997%, against FCC Adequate Replacement Test benchmarks of 95% and 99.99% (Granite). The release does not say who ran the tests.
• Granite’s own caveat. The EPIK page notes that some jurisdictions may require wireline connections for certain applications, especially fire and life safety.

UL listings are not mentioned on the pages I reviewed. Ask Granite directly if your AHJ wants a UL 864 listing. The fire code side is covered on my fire alarm communicator page.

If you buy copper lines from Granite today

Granite also resells legacy business phone lines from other carriers. On February 10, 2026, the FCC invited comments on Granite’s application to discontinue resold legacy business lines in parts of 17 states, with discontinuance on or after June 30, 2026 (FCC DA 26-137).

The notice lists AT&T as the underlying provider and names AT&T Phone for Business - Advanced as an adequate replacement. If you got a Granite letter, read the AT&T copper retirement guide too, because the dates come from the same process.

Granite also sells a Voice over Cable option, where an eMTA supports 4 to 8 lines and stacked units reach 24 lines (Granite). It needs a cable connection at the site.

Pros

• Up to 8 lines per device, double the Ooma AirDial port count.
• Granite lists analog modem, SCADA and high-volume fax support.
• Dual-SIM LTE plus wired broadband and PRI failover options.
• Approvals from CSFM and FDNY, per Granite.
• Nationwide managed installation and 24/7 monitoring from one company.

Cons

• No published pricing.
• Battery of up to 24 hours standby drops to about 8 hours of active use.
• No UL listing named on the pages I reviewed.
• Testing metrics are self-reported, with no named lab.
• Granite itself warns that some jurisdictions may still require wireline for fire.

Who it fits and who it doesn’t

Good fit:

• Multi-site companies that already buy voice from Granite and want one invoice.
• Rooms with 5 to 8 lines, including modems or high-volume fax.
• Portfolios that want the provider to handle installation in every state.

Less of a fit:

• A single building with one or two lines, where a smaller device or a dedicated communicator may be simpler.
• A fire panel in a jurisdiction that wants a UL 864 listed communicator tied to the panel.
• Buyers who want published prices to compare without a sales call.

Alternatives to compare

Alternative	Why consider it	Published pricing (October 2026)
Ooma AirDial	Four ports per unit, Ooma says UL 864 certified, LTE and Ethernet at the same time	None
IPFone POTSBOX Pro	Up to 16 lines with stacked adapters, 12 to 48 hour battery per IPFone	None
MetTel POTS Transformation	Up to 8 lines, up to 48 hour battery per MetTel	None
BCN POTS over LTE	Multi-site billing across voice, data and security	None
Dedicated fire communicator	Fire panel only, through your alarm company	Dealer pricing

How these devices work in general, and what to test, is on POTS in a box explained. The complete comparison is in the POTS line replacement guide.

Questions to ask Granite

• What is the monthly price per site and per line, and the contract term?
• Can you send the CSFM listing and the FDNY approval for the model you would install?
• Does EPIK carry a UL 864 listing, or will my AHJ accept the MFVN approvals?
• How long does the battery last with my actual line mix?
• Which alarm panel brands and formats have you tested with Alarm Protocol Relay?
• Who coordinates with my elevator and alarm contractors at each site?

Common mistakes when buying EPIK

1. Assuming 24 hours of battery. The 24-hour figure is standby; active use is about 8 hours per Granite.
2. Ignoring a Granite discontinuance letter. If you buy resold copper from Granite, its notice has its own date.
3. Putting a fire panel on EPIK without asking the AHJ. Granite itself flags this.
4. Signing a portfolio term before a pilot. Test the hardest site first.

If EPIK is on your list, ask me to quote EPIK next to one alternative.