Wireless Voice over IP (VoIP) Phones Guide

Wireless VoIP Phones: Enterprise Deployment Guide

Wireless VoIP phones let employees make and receive calls over your Wi-Fi network — without desk phones or PSTN lines. Microsoft Teams Phone integrates wireless VoIP into the Teams app your employees already use. EPC Group designs wireless VoIP architectures and Teams Phone deployments for enterprises.

Key facts

• Microsoft Teams Phone Standard: $8/user/month (outbound calling via Microsoft Calling Plans).
• Teams Phone with Domestic Calling Plan: $15/user/month, includes 3,000 outbound minutes/user.
• Wireless VoIP requires WPA2/WPA3 Wi-Fi, QoS marking (DSCP EF for voice), and dedicated SSIDs for voice traffic.
• Microsoft Teams-certified wireless handsets include Yealink, Poly, and AudioCodes devices.
• DECT wireless phones work alongside Teams Phone for environments needing ruggedized cordless devices.
• EPC Group holds core Microsoft Solutions Partner designations, including Modern Work.

How wireless VoIP works

Wireless VoIP converts voice calls into IP packets sent over your Wi-Fi network. No traditional phone lines are required. Call quality depends on network design — not the handset alone.

Microsoft Teams Phone extends this further: calls live inside the Teams app. Employees use Teams on their laptop, mobile device, or a certified Teams-compatible wireless handset. One platform handles chat, meetings, files, and calls.

Microsoft Teams Phone calling options

Teams Phone offers three PSTN connectivity models. Choose based on your existing carrier relationships and cost priorities.

• Microsoft Calling Plans — Microsoft provides PSTN connectivity directly at $8–$15/user/month. Simple setup. Limited geographic availability outside the US, UK, and major markets.
• Operator Connect — keep your existing carrier (AT&T, Verizon, BT, Lumen). Integrate natively with Teams. No on-premises hardware required.
• Direct Routing — connect any SIP-certified carrier via a Session Border Controller (SBC). Maximum carrier flexibility. Requires SBC management.

Wireless VoIP network requirements

Wireless VoIP call quality depends on your Wi-Fi network design. These are the minimum enterprise requirements.

• Wi-Fi standard — Wi-Fi 6 (802.11ax) recommended. Minimum Wi-Fi 5 (802.11ac) for acceptable call quality.
• Security — WPA2-Enterprise or WPA3-Enterprise. Consumer WPA2-PSK is not acceptable for enterprise voice.
• QoS marking — DSCP EF (Expedited Forwarding) for voice packets. DSCP CS3 for signaling. Without QoS, voice competes with bulk data.
• Dedicated voice SSID — separate SSID for voice traffic with VLAN isolation prevents interference from data traffic.
• Cell overlap — 20% cell overlap between access points for seamless roaming during calls.
• Latency — one-way latency under 150ms, jitter under 30ms, packet loss under 1% for ITU-compliant voice quality.

Teams-certified wireless handsets

These manufacturers produce wireless handsets certified for Microsoft Teams Phone.

• Yealink W76H / W70B — DECT handsets with Teams integration. Up to 10 handsets per base station.
• Poly Rove — DECT wireless phones with multi-cell DECT systems for large facilities.
• AudioCodes 450HD — cordless IP DECT phone for mid-size deployments.
• Spectralink DECT — enterprise-grade DECT for healthcare, manufacturing, and hospitality environments.

DECT vs Wi-Fi VoIP: which to choose

• Wi-Fi VoIP (Teams app) — best for knowledge workers using laptops and smartphones. No extra hardware. Uses existing Wi-Fi infrastructure.
• DECT wireless phones — best for manufacturing floors, warehouses, healthcare, and hospitality where workers need ruggedized handsets but not laptop access.
• Hybrid — Teams Phone handles desk and mobile workers. DECT handles floor workers. Both integrate into the same Teams Phone system.

Migration from legacy PBX to wireless VoIP

EPC Group migrates organizations from on-premises PBX to Teams Phone in five phases.

1. Assessment — audit existing phone lines, extensions, auto attendants, and call queues. 2–3 weeks.
2. Network readiness — validate Wi-Fi for voice. Remediate QoS, SSID, and AP density gaps. 2–4 weeks.
3. Teams Phone configuration — set up calling plans, auto attendants, call queues, and direct routing. 2–4 weeks.
4. Pilot migration — migrate a pilot group. Validate call quality and routing. 2–3 weeks.
5. Full migration and PBX decommission — phased migration, then hardware removal. 4–12 weeks.

Why EPC Group for wireless VoIP

• Microsoft Solutions Partner — core designations, including Modern Work.
• Oldest continuous Microsoft Gold Partner in North America (2003–2022).
• Teams Phone, Direct Routing, Operator Connect, and DECT integration expertise.
• Enterprise network assessment and Wi-Fi design for voice-grade deployments.

Frequently asked questions

What are wireless VoIP phones?

Wireless VoIP phones make and receive calls over a Wi-Fi or DECT radio network instead of traditional phone lines. In enterprise environments, Microsoft Teams Phone is the most common wireless VoIP platform — employees call from the Teams app on any device without a desk phone.

How much does wireless VoIP cost?

Microsoft Teams Phone Standard costs $8/user/month. The Domestic Calling Plan adds $15/user/month with 3,000 outbound minutes. Handsets cost $100–$500+ per device depending on model. Most organizations see 40–60% savings versus legacy PBX line costs.

What Wi-Fi equipment do I need for wireless VoIP?

You need enterprise Wi-Fi access points with QoS support: Wi-Fi 6 preferred, Wi-Fi 5 minimum. Configure DSCP EF marking for voice traffic, a dedicated voice SSID, and 20% cell overlap for seamless roaming. EPC Group performs Wi-Fi assessments before deploying wireless VoIP.

Can I use DECT phones with Microsoft Teams?

Yes. Teams-certified DECT systems from Yealink, Poly, and Spectralink integrate with Teams Phone. DECT provides better radio reliability in industrial environments than Wi-Fi VoIP. Both can coexist in the same Teams Phone deployment.

How long does a VoIP migration take?

A typical PBX-to-Teams Phone migration takes 12–26 weeks: 2–3 weeks assessment, 2–4 weeks network readiness, 2–4 weeks configuration, 2–3 weeks pilot, and 4–12 weeks phased production migration. Timeline scales with the number of locations and user count.

Schedule a wireless VoIP consultation

Talk to an EPC Group unified communications architect about wireless VoIP and Teams Phone deployment. Call (888) 381-9725 or request a 30-minute discovery call.