Get a Proposal Call: 844-486-4766

20-Phone Enterprise Cisco SIP Phone System

The same Cisco hardware the Fortune 500 runs on, sized for a 20-person office and priced for a small business. A Certified Network Specialist sets it up, runs it, and manages it end to end — you don't touch the tech.

★★★★★5.0/5(25 reviews for this system)Shopper Approved →
$4,950 $1,275
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Save up to 79%
Enterprise Cisco hardware, priced right — set up & managed for you.
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+ SIP Express Plus from $179/mo (per user tier)
Phone service, warranty & support — 20 SIP lines, HD audio, plus itemized usage, E911 & regulatory fees.

Every system is customized to your needs. Request a proposal for your exact configuration.

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100% CiscoHardware
Installs inUnder 2 Hours
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Lifetime WarrantyWith SIP Express Plus
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SIP ServiceFrom $179/mo + fees
View System Pricing & Details ↓

🚚 $350 flat-rate shipping · In-stock systems ship in 3–5 business days · custom-configured systems may need extra lead time

★★★★★
4.9/5 Shopper Approved
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5.0 Google Reviews
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Trustpilot Excellent
Lifetime Warranty with SIP Express Plus
👤Real People, Real Support

Built for a 20-person office

If you're running 15 to 25 phones — a growing office, a busy clinic, a branch, a contact desk — this is the system sized for you. You get enterprise Cisco call quality without the enterprise price tag, and without a monthly cloud bill that climbs every time you add a seat.

Cloud VoIP charges you per user, every month, forever — for phones you'll never own. A 20-line cloud plan runs roughly $30,000–$36,000 over five years. This system, with SIP Express Plus, comes in around $12,015 over the same five years. That's up to ~$23,985 back in your pocket — and a phone system that keeps working the same on year five as it did on day one.

You don't have to be an IT person to run it. That's our job, not yours.

$1,275 doesn't mean entry-level. It means priced right.

This is real Cisco enterprise hardware — the same ISR routers and 8841 phones the Fortune 500 runs on — refurbished, fully tested, and built to run for a decade. We can price it this far below cloud VoIP for one reason: there's no monthly per-user rent baked in, and the deep system discount is our way of earning your SIP Express Plus service.

You're not buying a stripped-down box. You're buying enterprise gear at a small-business price, backed by a lifetime warranty. That's the whole point.

You get the phones. We handle everything behind them.

This isn't a DIY project. A Certified Network Specialist handles the technical end from start to finish.

We set it up.

Your system ships 90% pre-configured. A Certified Network Specialist finishes the setup remotely — most offices are live in under 2 hours. No IT department, no on-site technician visit.

We run it.

Moves, adds, changes, new extensions, auto-attendant tweaks — you call us, we handle it. No change-order fees.

We manage it.

Ongoing monitoring, updates, and support are handled for you, so the phones just work.

One number to call.

A Certified Network Specialist who knows your system — not an offshore call center, not a ticket queue.

Cisco-certified hands.

20+ years of voice networking and CCNP-level certification on every build.

Your Complete 20-Phone + SIP System

Everything you need to run a professional phone system with phone service included. Pre-configured and ready to deploy.

Component Specs Details
Cisco ISR 4331
Cisco IP PBX Router
CME 4331 UCK-K9 ISR
The brain of your phone system. Handles all call routing, voicemail, and auto-attendant.
Cisco 8841
20x Cisco 8841 Executive Phones
800x480 color LCD, HD audio
Gigabit ethernet, custom backgrounds with your company logo.
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20 SIP Phone Lines Included
SIP Express Plus — from $179/mo
Full phone service with HD audio calling. No separate carrier needed.
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Auto-Attendant (IVR)
Fully customizable
Professional greeting routes callers to the right person or department.
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Voicemail System
50-user, voicemail-to-email
Never miss a message. GUI management included.
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Softphone Access
Android, iPhone, Mac, PC
Use your phone system from anywhere.
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Remote-Assisted Installation
90% pre-configured before shipping
You plug in, a Certified Network Specialist guides you through the rest. Under 2 hours.
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Lifetime Warranty & Support With SIP Express Plus
Full hardware warranty
Lifetime warranty included automatically with active SIP Express Plus service.
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Cisco Certified Professionals
CCNP Collaboration, CCNP R&S, CCDA
Same certs as Fortune 500 IT teams.

* All Cisco phones and equipment are refurbished to like-new condition with full warranty.

* SIP Express Plus service includes lifetime warranty on all hardware. SIP Express Plus Terms & Conditions

Features That Cloud Providers Charge Extra For

Everything listed below comes standard. No add-on fees. No surprises.

FeatureWith VPEWith Cloud VoIP
Auto-Attendant / IVR✓ Included$20–50/mo extra
Voicemail-to-Email✓ IncludedMid-tier plan req'd
Call Recording✓ Available$49.99/mo (Vonage)
HD Audio✓ IncludedDepends on internet
Quality of Service (QoS)✓ Built-inNot in your control
Custom Hold Music✓ IncludedHigher tier plan
Custom Phone Backgrounds✓ IncludedNot available
Softphone Access✓ IncludedPer-user fee
SIP Phone Service✓ BundledAlways separate
Lifetime Warranty✓ IncludedN/A (rental)

Up and Running in 3 Simple Steps

No IT department required. No on-site technician visit.

01

Request a Proposal

Tell us about your business — how many phones, your office setup, what matters most. A Certified Network Specialist builds your exact configuration and quote.

02

We Pre-Configure & Ship

Your system arrives 90% pre-configured — routing, extensions, auto-attendant, voicemail — ready to plug in.

03

We Finish Setup, Then Run It

A Certified Network Specialist completes the remote setup — most offices are live in under 2 hours — and stays on as your one number to call for anything after.

What This System Actually Saves You

The on-premise system that looks "expensive" up front is the most cost-effective option over any reasonable timeframe.

VoIP PBX Express + SIP
$12,015
$1,275 system
$179/mo SIP trunks
× 60 months
Cloud VoIP (20 users)
$36,000
$600/mo (avg $30/user)
× 60 months
 
YOU SAVE $23,985

That's enough to hire a part-time employee for a year — and then some.

No monthly rent — that's why it costs less. You own the system outright; SIP Express Plus covers the service, warranty, and support.

$37,200
$30,000
$29,940
$28,800
VPE + SIP
$12,015

Cisco 8841/8851/8861 Executive Color IP Phones

The same phones used by Fortune 500 companies.

Cisco 8841 Executive Color IP Phone
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800x480 Color LCD DisplayHigh-resolution backlit screen
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HD Wideband AudioCrystal-clear voice quality
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5 Programmable Line KeysCustomizable buttons
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Dual Gigabit Ethernet PortsNo additional cabling needed
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Custom BackgroundDisplay your company logo
Power over EthernetNo separate power adapter
Cisco 8861
Wireless Desk Phone — 8861Built-in Wi-Fi & Bluetooth
Cisco 730 Headset
Cisco 730 Wireless HeadsetBluetooth pairing with 8851/8861

Enterprise-grade build quality. Refurbished to like-new condition. Full manufacturer specs.

Available Add-Ons

Build the perfect system for your office. Add any of these to your custom proposal.

Cisco CP-BEKEM

Receptionist Sidecar

Cisco CP-BEKEM

Expansion panel for receptionists handling high call volume

Include in Proposal
Cisco 8845

Video Phones

Cisco 8845

2-way HD video for conference rooms and exec offices

Include in Proposal
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Door Phone

Audio/Video

See and talk to visitors before buzzing them in

Include in Proposal
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Paging System

Overhead integration

For warehouses, retail, and large offices

Include in Proposal
Cisco 8832

Conference Phone

Cisco 8832

Dedicated conference phone for meeting rooms

Include in Proposal
Wireless IP Phone

Wireless Phones

Wireless IP Phone

For warehouse and roaming staff

Include in Proposal

Additional options: PoE Network Switch · Call Recording · Call Detail Records · Virtual Fax · Network Integration Services · Wireless Networking

SIP Express Plus Included

This system comes with full phone service built in. No separate carrier. No porting headaches. Just plug in and start making calls.

Included with This System

Phone service, warranty & support — one package, from $179/mo

Your 20 SIP lines run on SIP Express Plus — full HD-audio phone service with no separate carrier to deal with, managed by a Certified Network Specialist.

20 dedicated SIP phone lines
HD Audio Calls
Number porting available
E911 calling ($3.50/DID/mo)
Caller ID & CNAM
Managed by our team
Month-to-month — no long-term contract
Priority technical support
From $179/mo base rate, 20–30 user tier

Network access, E911 ($3.50/DID), DID, and regulatory fees are billed in addition and itemized on your quote. Rates adjust 8% each July. See the SIP Express Plus Terms for the full pricing breakdown.

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Lifetime Warranty Included — As long as your SIP Express Plus service is active, your entire phone system is covered by our lifetime hardware warranty. No extra cost. No separate plan to buy.
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E911 emergency calling — important: Like all VoIP/SIP service, E911 depends on power and Internet and will not work during an outage. You are responsible for keeping the registered service address current for each phone number (DID). Read the full E911 limitations →

What Our Customers Say

4.9/5 across 100+ reviews on Trustpilot, Shopper Approved, Google, Facebook, and eBay

★★★★★
"Not only was all the equipment high quality, but with their support package, if there is ever a problem Scott is on top of it immediately until it get's resolved."
★★★★★
"The Office of the Territorial Public Defender (OTPD) has been using VoIP PBX Express IP PBX solutions as our enterprise phone system provider, and the level of service we’ve consistently received has been nothing short…" Read full review →
★★★★★
"Great Support!"
See all 25 reviews on Shopper Approved →

Frequently Asked Questions

This bundle includes SIP Express Plus phone service (from $179/mo for 20 lines) and a lifetime warranty. The standalone system is hardware-only — you bring your own phone lines. This bundle gives you a lower upfront cost ($1,275 vs $3,950) because the deep system discount is our way of earning your SIP Express Plus service.

Yes. Over 5 years, this system costs ~$12,015 total. RingCentral costs ~$36,000, Vonage ~$37,200, and Nextiva ~$30,000 for 20 users. You save roughly $18,000–$25,000 compared to any major cloud provider.

SIP Express Plus is our managed phone line service. It provides 20 SIP trunks (phone lines) with HD audio calling from $179/month at the per-user tier. It bundles phone service, lifetime hardware warranty, and ongoing support into one package, and a Certified Network Specialist manages the service end-to-end — so you don't need a separate phone carrier.

As long as your SIP Express Plus service is active, your entire phone system — router, phones, and all components — is covered by our lifetime hardware warranty. No extra cost, no separate plan to purchase.

Yes. We can port your existing phone numbers to SIP Express Plus. The process typically takes 5–10 business days, and we handle all the paperwork.

To keep the upfront cost as low as possible. Many offices already have a PoE switch, or you can add one to your proposal. We offer Cisco PoE switches as an add-on — just request it in your custom proposal.

Yes. Cisco CME supports softphones on Android, iPhone, Mac, and PC. Remote workers connect just like they would with a cloud system.

Under 2 hours. We pre-configure 90% of the system before shipping. You plug in the phones, and we guide you through the final setup remotely. SIP service is already active when the system arrives.

See All System Sizes

From 10 phones to 100. Every system includes the same Cisco quality and support.

Entry Level
10-Phone System

10-Phone System

Cisco 8841 color phones with full PBX

Starting at $2,950$3,850
  • 10x Cisco 8841 Phones
  • Auto-Attendant & Voicemail
  • 1-Year Warranty · Lifetime with SIP Express Plus
View System
Popular
20-Phone Executive System

20-Phone Executive System

Standalone system with PoE switch included

Starting at $3,950$4,950
  • 20x Cisco 8841 Phones
  • PoE Switch Included
  • 1-Year Warranty · Lifetime with SIP Express Plus
View System
50-Phone Executive System

50-Phone Executive System

Large office with reception phones & wireless

Starting at $9,550$12,550
  • 50x Cisco Phones + 2 Wireless
  • 4x Reception Phones w/ Sidecar
  • 1-Year Warranty · Lifetime with SIP Express Plus
View System
Enterprise
100-Phone System

100-Phone System

Enterprise scale with 200-user voicemail

Starting at $15,500$19,500
  • 100x Cisco Phones + 2 Wireless
  • 4x Reception w/ Sidecar
  • 200-User Voicemail
View System

Enterprise Cisco, priced right, set up and managed for you.

A complete 20-phone Cisco SIP system — $4,950 $1,275, up to 79% off — with a Certified Network Specialist to set it up, run it, and manage it. SIP Express Plus from $179/mo. Tell us what you need and we'll build your custom quote.

Get a Custom Proposal Call 844-486-4766

Or email: sales@voippbxexpress.com

Get a Custom Proposal 📞
Customer Reviews