Phone:
A traditional PRI from AT&T or Comcast costs $400–800/month for 23 channels with basic caller ID and a multi-year contract. VoipPlus delivers the same 23 concurrent call paths for $368/month with 50+ features included, month-to-month, no contract.
Most Chicago businesses save 40–60% when replacing their PRI with a modern phone system.
| Service | Channels | Monthly Cost | Features Included | Contract |
|---|---|---|---|---|
| AT&T PRI | 23 (1 T1) | $500-800/mo | Basic caller ID | 2-3 year term |
| Comcast PRI | 23 (1 T1) | $400-700/mo | Basic caller ID | 2-3 year term |
| VoipPlus SIP | 23 | $368/mo | 50+ features included | Month-to-month |
* PRI pricing based on published Chicago-area rates as of 2024. Actual rates vary by location and contract terms.
A PRI (Primary Rate Interface) is a T1 circuit that delivers 23 voice channels over copper or fiber to your on-premise PBX. It was the standard for business telephone service for decades.
PRI technology is being phased out by major carriers. AT&T, Verizon, and other ILECs are actively migrating customers to IP-based phone service. Businesses that wait risk losing support for aging hardware.
SIP trunking delivers the same concurrent call capacity as PRI, but over your existing internet connection — with 50+ features your PRI never had.
Average Cost Savings
Features Included
The migration takes 2–4 weeks and we handle the entire process. Your phone numbers transfer seamlessly.
We review your current PRI configuration, call volume, and DID inventory. This identifies exactly what you need.
We submit port requests to your current carrier (AT&T, Comcast, etc.). All your DIDs transfer to VoipPlus.
We configure SIP trunks to your existing PBX (Asterisk, FreePBX, 3CX) or set up hosted PBX if needed.
On port completion day, calls route to VoipPlus. We stay on standby during the transition.
| Current Carrier | Porting Time | Notes |
|---|---|---|
| AT&T Illinois | 7-14 business days | Requires CSR and LOA |
| Comcast Business | 10-15 business days | May require contract buyout |
| RingCentral | 5-10 business days | Usually straightforward |
| Vonage Business | 5-10 business days | Usually straightforward |
Yes, all your DIDs (phone numbers) port to VoipPlus. We handle the paperwork and carrier coordination. Your customers dial the same numbers.
Call quality meets or exceeds PRI when properly configured. We use the G.711 codec (same audio quality as PRI) and prioritize voice traffic on your network. Most businesses report no difference.
E911 is included with every VoipPlus line. We register your business address with the local PSAP (Public Safety Answering Point) in Cook County, DuPage County, Lake County, and all Chicagoland jurisdictions.
Not necessarily. If you have an IP-capable PBX (Asterisk, FreePBX, 3CX, Cisco), we connect via SIP trunk. Legacy PBX systems may need an ATA or gateway device.
Each concurrent call requires approximately 100 Kbps. For 23 channels (PRI equivalent), you need about 2.5 Mbps of dedicated bandwidth. Most Chicago business internet connections exceed this.
No. VoipPlus service is month-to-month. No term commitments, no early termination fees. We earn your business every month.
Get a free assessment of your current PRI setup and see exactly how much you can save with a modern business phone system.
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Hoffman Estates, IL 60169 — Serving Chicago, Schaumburg, Naperville, Arlington Heights, and all Chicagoland