If you need home internet and landline-style calling in one device, a cable modem with built-in voice support can simplify your setup and reduce extra equipment.
This guide highlights the key differences that matter most: provider compatibility, speed tier, phone-line support, and whether you should choose a modem-only model or an all-in-one gateway.
Best 10 Cable Modem with Built-In Voice Support Picks for 2026
Xfinity Voice Starter Pick
NETGEAR CM500V Voice Cable Modem
- Certified for Xfinity Internet and Voice
- Supports up to 2 phone lines
- Works with any WiFi router via Gigabit Ethernet
Best For: Xfinity users who want a simple modem with voice support
Speed-First Modem Only
ARRIS SB8200 DOCSIS 3.1 Cable Modem
- DOCSIS 3.1 supports plans up to 2 Gbps
- Two Gigabit Ethernet ports
- Certified for Cox, Xfinity, and Spectrum
Best For: Buyers who need a fast modem and already have separate voice service
Premium Xfinity Voice Option
NETGEAR Nighthawk CM1150V Voice Modem
- Certified for Xfinity Internet and Voice
- Supports plans up to 2 Gbps
- Includes RJ11 phone support and router-friendly Ethernet
Best For: Xfinity users wanting a faster voice modem with multi-gig potential
All-in-One Convenience Choice
ARRIS SBG10 Modem Router Combo
- Combines modem and AC1600 WiFi router
- DOCSIS 3.0 supports up to 400 Mbps
- App setup and parental controls included
Best For: Users who want an all-in-one modem-router combo
Multi-Gig Xfinity Voice Pick
- DOCSIS 3.1 modem for plans up to 2.5Gbps
- Built-in Xfinity Voice support for 2 phone lines
- Includes a 2.5Gbps Ethernet port
Best For: Xfinity homes that want multi-gig speed and voice service
Budget Voice Modem Choice
- DOCSIS 3.0 modem with Xfinity Voice support
- Approved for plans up to 800 Mbps
- Easy setup with the SURFboard Central app
Best For: Xfinity users who want a simple voice modem for moderate-speed plans
Simple No-Voice Cable Modem
- DOCSIS 3.0 modem for internet-only use
- Works with major cable providers including Xfinity and Cox
- Supports plans up to 400 Mbps
Best For: Cable customers who do not need phone service
Xfinity Voice DOCSIS 3.1 Pick
- Supports Xfinity Internet & Voice up to 800Mbps
- Handles up to 2 phone lines with enhanced call features
- Four Gigabit Ethernet ports and DOCSIS 3.1
Best For: Xfinity users who want voice support and a modem-only setup
All-in-One Internet Upgrade
- DOCSIS 3.1 modem and WiFi 6 router combo
- Up to 2,000 sq. ft. coverage and 25 devices
- Not compatible with bundled voice service
Best For: Users who want a modem/router combo and do not need voice support
All-in-One Voice Value
- Supports Xfinity Cable & Voice plans up to 600Mbps
- Three-in-one modem, router, and voice design
- Includes 2 VoIP ports, 4 Gigabit Ethernet ports, and optional battery backup
Best For: Xfinity users who want an integrated voice modem/router combo
Xfinity Voice Starter Pick – NETGEAR CM500V Voice Cable Modem
If you need a cable modem with built-in voice support for Xfinity, the NETGEAR CM500V is a straightforward option. It is certified by Comcast for Xfinity Internet and Voice, supports plans up to 300 Mbps, and includes support for up to 2 telephone lines with enhanced calling features.
Best For: Xfinity customers who want a DOCSIS 3.0 modem with voice service and a simple one-box replacement for rented equipment.
Pros:
- Certified for Xfinity Internet and Voice service
- Supports up to 2 phone lines with caller ID, 3-way calling, and call forwarding
- Works with any WiFi router through its Gigabit Ethernet port
- Can help replace rented modem equipment and reduce monthly fees
Cons:
- Not compatible with Verizon, AT&T, CenturyLink, DSL, DirecTV, DISH, or non-Xfinity voice services
- Limited to cable plans up to 300 Mbps
- DOCSIS 3.0 is older than newer DOCSIS 3.1 models
The CM500V makes sense if your priority is getting reliable Xfinity voice support without adding complexity. It is not the fastest modem here, but it is purpose-built for households that need phone-line support alongside internet access.
Speed-First Modem Only – ARRIS SB8200 DOCSIS 3.1 Cable Modem
The ARRIS SB8200 is a strong choice if you want a cable modem with built-in voice support in your roundup criteria, but this model itself is modem-only and does not include voice ports. What it does offer is DOCSIS 3.1 performance, up to 2 Gbps plan support, and two Gigabit Ethernet ports for pairing with your own router.
Best For: Users who want a fast DOCSIS 3.1 cable modem and already use a separate phone or voice setup.
Pros:
- DOCSIS 3.1 support for plans up to 2 Gbps
- Two 1 Gigabit Ethernet ports
- Compact design with clear status LEDs
- Certified and tested with major providers like Cox, Xfinity, and Spectrum
Cons:
- No built-in voice support or phone ports
- Requires a separate Wi-Fi router for wireless coverage
- Not compatible with fiber, DSL, or satellite services
If voice service is essential, this is not the right pick. If speed and long-term cable compatibility matter more, the SB8200 is a capable modem-only upgrade that fits well in high-performance home networks.
Premium Xfinity Voice Option – NETGEAR Nighthawk CM1150V Voice Modem
NETGEAR - Nighthawk 32 x 8 DOCSIS 3.1 Voice Cable Modem, Voice support - Black (Renewed)
Check Price On AmazonThe NETGEAR Nighthawk CM1150V is a premium cable modem with built-in voice support for Xfinity users who want more headroom than a basic modem offers. It is certified by Comcast for Xfinity Internet and Voice, supports plans up to 2 Gbps, and includes the hardware needed for up to 2 phone lines.
Best For: Xfinity households that want a multi-gig voice modem and plan to keep using their own WiFi router.
Pros:
- Built for Xfinity Internet and Voice service
- Supports cable plans up to 2 Gigabits
- Includes Ethernet and RJ11 telephone cables in the box
- Works with any WiFi router
Cons:
- Not compatible with Verizon, AT&T, CenturyLink, DSL, DirecTV, DISH, or non-Xfinity voice services
- Renewed unit comes with a 90-day limited warranty
- Designed for Xfinity, so provider compatibility is narrow
This is the most speed-focused voice modem in the group, especially if you want to avoid rental fees and keep your own wireless router. It is a strong fit for Xfinity users who expect to push beyond entry-level cable speeds.
All-in-One Convenience Choice – ARRIS SBG10 Modem Router Combo
The ARRIS SBG10 is a practical cable modem router combo if you want fewer boxes on your desk and an easier setup. It supports DOCSIS 3.0 cable internet up to 400 Mbps, includes AC1600 WiFi, and is designed for customers who want an all-in-one home networking solution.
Best For: Households that want a cable modem router combo instead of a separate modem and Wi-Fi router.
Pros:
- Two-in-one modem and WiFi router design
- DOCSIS 3.0 support for up to 400 Mbps internet speeds
- Dual-band AC1600 WiFi with app-based setup and management
- Can help reduce rental fees by owning your equipment
Cons:
- No built-in voice support or phone ports
- Not ideal if you want a separate upgrade path for modem and router
- Compatibility depends on your cable provider
The SBG10 is best viewed as a convenience-focused networking hub rather than a voice modem. It works well for users who want straightforward setup and WiFi built in, but it is not the right match if built-in phone support is required.
Multi-Gig Xfinity Voice Pick – NETGEAR Nighthawk CM2050V
If you want a cable modem with built-in voice support for Xfinity, the NETGEAR Nighthawk CM2050V is built for high-speed plans up to 2.5Gbps. It pairs DOCSIS 3.1 performance with two phone lines, making it a strong fit for households that want fast internet and home phone service in one device.
Best For: Xfinity customers on multi-gig plans who need voice support for up to two telephone lines.
Pros:
- Supports Xfinity Internet and Voice service, including up to 2 telephone lines
- Certified by Xfinity and suited to Triple Play setups
- Includes a 2.5Gbps Ethernet port for multi-gig connections
- Works with any separate WiFi router, with best results using WiFi 6 or 7
Cons:
- Not compatible with Verizon, AT&T, CenturyLink, DSL providers, DirecTV, or DISH
- Requires a separate WiFi router for wireless networking
- Made for use in the U.S. only
For buyers who need fast cable internet and voice service in one modem, this model stands out for its multi-gig support and Xfinity certification. The built-in phone support and 2.5Gbps port make it the most future-ready option here.
Budget Voice Modem Choice – ARRIS SURFboard SBV3202
The ARRIS SURFboard SBV3202 is a practical cable modem with built-in voice support for Xfinity users who want a simple, proven setup. It uses DOCSIS 3.0 and supports internet and voice service plans up to 800 Mbps, so it fits well if you do not need multi-gig speeds.
Best For: Xfinity internet-and-voice households looking for a reliable DOCSIS 3.0 modem for plans up to 800 Mbps.
Pros:
- Works with Xfinity Internet and Voice service
- Supports approved cable internet plans up to 800 Mbps
- Can help reduce rental fees by letting you own your modem
- Simple setup with the SURFboard Central app
Cons:
- DOCSIS 3.0 is older than DOCSIS 3.1
- Not designed for multi-gig internet plans
- Requires a separate Wi-Fi router for networking
This is a straightforward pick if you want voice support without paying for higher-end hardware. It is best suited to users whose plan tops out at 800 Mbps and who value easy setup over the newest modem technology.
Simple No-Voice Cable Modem – NETGEAR CM500
The NETGEAR CM500 is a basic cable modem for users who need a dependable internet-only setup, but it is not a cable modem with built-in voice support. If your goal is to add phone service through the modem, this one is not the right fit; it is designed for cable internet plans up to 400 Mbps and works with a separate WiFi router.
Best For: Internet-only cable users who want a straightforward DOCSIS 3.0 modem for modest-speed plans.
Pros:
- Compatible with major cable providers including Xfinity and Cox
- Supports plans up to 400 Mbps
- Can replace rental equipment and save on fees
- Connects to any separate WiFi router
Cons:
- Does not include built-in voice support
- Not suitable for Xfinity Voice or phone lines
- DOCSIS 3.0 is older than newer multi-gig modem technology
If voice service is a must, skip this model and choose one of the voice-capable options above. The CM500 makes sense only when you want a basic cable modem for internet access and do not need telephony features.
Xfinity Voice DOCSIS 3.1 Pick – NETGEAR Nighthawk CM1150V
If you want a cable modem with built-in voice support for Xfinity, the NETGEAR Nighthawk CM1150V is built for internet and phone service in one box. It supports Xfinity Internet & Voice plans up to 800Mbps, works with your own WiFi router, and adds four Gigabit Ethernet ports for wired gear.
Best For: Xfinity households that need voice support, strong wired connectivity, and DOCSIS 3.1 performance without renting equipment.
Pros:
- Supports Xfinity Internet & Voice plans up to 800Mbps
- Works with up to 2 telephone lines and enhanced call features
- DOCSIS 3.1 with 32×8 channel bonding and OFDM 2×2
- Four Gigabit Ethernet ports, including multi-gig link aggregation support
Cons:
- Designed for Xfinity Voice service, so it is not a universal voice modem
- Requires your own separate WiFi router for wireless coverage
For buyers who want a long-term cable modem with built-in voice support and modern DOCSIS 3.1 hardware, the CM1150V is a focused fit. It is especially practical if you already have a router and want to reduce rental fees while keeping phone lines active.
All-in-One Internet Upgrade – NETGEAR Nighthawk CAX30
The NETGEAR Nighthawk CAX30 is a DOCSIS 3.1 cable modem and WiFi 6 router combo, but it is not a cable modem with built-in voice support. It is aimed at users who want to replace both a modem and router for compatible cable internet plans, with AX2700 speeds, four Ethernet ports, and app-based setup.
Best For: Cable internet customers who do not need bundled voice service and want an all-in-one modem/router upgrade.
Pros:
- Combines DOCSIS 3.1 modem and WiFi 6 router in one unit
- Supports major providers such as Xfinity, Spectrum, and Cox
- Four Gigabit Ethernet ports and one USB 3.0 port
- Coverage up to 2,000 sq. ft. with up to 25 concurrent devices
Cons:
- Not compatible with bundled voice service
- Not compatible with Verizon, AT&T, CenturyLink, DSL, DirecTV, or DISH
If your search is specifically for voice support, this model is not the right match. It makes more sense for households that want a single device for internet and WiFi, but no phone-line capability.
All-in-One Voice Value – NETGEAR Nighthawk C7100V
If you need a cable modem with built-in voice support for Xfinity and want an all-in-one unit, the NETGEAR Nighthawk C7100V fits that role. It supports Xfinity Cable & Voice plans up to 600Mbps, includes AC1900 WiFi, and adds 2 VoIP ports plus 4 Gigabit Ethernet ports.
Best For: Xfinity customers who want modem, router, and voice service in one device with straightforward setup.
Pros:
- Supports Xfinity Cable & Voice plans up to 600Mbps
- Three-in-one design with modem, WiFi router, and voice support
- Two VoIP ports and four Gigabit Ethernet ports
- Optional battery backup for outages with up to 8 hours standby
Cons:
- DOCSIS 3.0 is older than newer DOCSIS 3.1 models
- Top speed support is lower than the CM1150V in this roundup
The C7100V is a practical choice if you want integrated voice and WiFi without buying separate hardware. It is best suited to users whose service speed needs fall within its Xfinity support range and who value the convenience of a single device.
How We Picked the Best Cable Modem with Built-In Voice Support
We focused on models that combine cable internet with voice features for major providers such as Xfinity, while also considering DOCSIS version, supported internet tiers, phone-line capacity, and whether the device is modem-only or a modem-router combo. Compatibility matters most, so every pick should be checked against your provider’s current approved-device list before buying.
Quick Comparison
At a high level, DOCSIS 3.1 models are the safest choice for faster plans and better long-term value, while DOCSIS 3.0 options are still practical for lower to mid-tier service. Voice-capable models typically support one or two phone lines, and modem-router combos are best for buyers who want fewer devices on the shelf. If you already have a strong router, a standalone Cable Modem with Built-In Voice Support is usually the cleaner setup.
Key Buying Factors for a Cable Modem with Built-In Voice Support
Provider Certification
Voice service is more restrictive than internet-only service. Make sure the exact model is approved for your ISP and your specific voice plan. A modem that works for internet may not activate phone service.
Speed Headroom
Match the modem to your current plan, but leave room for upgrades. DOCSIS 3.1 is the better choice if you expect to move above 400 Mbps or want more future-proofing.
Phone-Line Support
Most homes only need one line, but some models support two. Choose based on how your household uses the service now and whether you need a separate line for work or a secondary number.
Modem-Only Vs. Combo
Standalone models are usually easier to pair with a better router and can offer stronger flexibility. Combo units are simpler for small spaces and users who want fewer components, but they may be harder to upgrade over time.
Installation and Return Policy
Voice activation can take longer than internet-only setup, so check activation steps, rental termination timing, and return windows before switching from provider hardware.
Who Should Buy Which Cable Modem with Built-In Voice Support?
If you want the simplest upgrade from rented equipment, choose a certified voice modem that matches your current speed tier. If your internet plan is faster or likely to grow, prioritize a DOCSIS 3.1 Cable Modem with Built-In Voice Support. If you want fewer devices and basic home networking in one box, a modem-router combo makes sense. For larger homes or users who care most about Wi‑Fi performance, a standalone voice modem paired with a separate mesh or high-end router is usually the strongest long-term setup.