ARRIS SURFboard SBV3202
4.2Editor score
Xfinity voice service support
DOCSIS 3.0 technology
Two telephony ports
Plans up to 800 Mbps
Separate Wi-Fi router required
In this guide
A modem with telephony combines cable internet service with digital phone service in one device, making it a practical choice for households that want both services through a single connection. The right model should support your provider, include enough phone ports and call features, and provide Ethernet and Wi-Fi options suited to your home.
This guide compares ten cable modems and modem-router combinations based on the supplied specifications, including DOCSIS generation, supported plan speeds, Ethernet ports, voice support, Wi-Fi capability, provider compatibility, and setup features. It also distinguishes dedicated voice models from internet-only options, helping shoppers avoid incompatible purchases.
Each review explains who should consider the product and which limitations deserve attention before buying. Ratings provide an additional reference point, while practical compatibility details matter just as much: a modem with advanced specifications is only useful when your cable provider and internet plan support it. Prices and rental charges change over time.
Top 3 Picks for Best Modem with Telephony
NETGEAR Nighthawk CM1150V
4.1Editor score
Xfinity internet and voice
Two telephone line support
DOCSIS 3.1 32×8 bonding
Four Gigabit Ethernet ports
Link aggregation for 2G
NETGEAR Nighthawk CM2050V
4.0Editor score
Xfinity internet and voice
DOCSIS 3.1 technology
Plans up to 2.5 Gbps
Two telephone line support
2.5 Gbps Ethernet port
Top 10 Best Modem with Telephony in 2026 Compared
The comparison below covers all ten supplied models, including dedicated Xfinity Voice devices, general cable modems, and combined modem-router systems. Use the rows to check provider support, voice capabilities, DOCSIS generation, wired-speed potential, and whether separate Wi-Fi hardware is needed.
ProductsSpecificationsEditor scorePrice
Best Budget
ARRIS SURFboard SBV3202
DOCSIS 3.0
Xfinity voice
Up to 800 Mbps
Two phone ports
No built-in Wi-Fi
4.2Editor score
Editor's Choice
Arris TM3402
DOCSIS 3.1
32×8 downstream
2×2 upstream
Telephony model
Not Cox supported
3.4Editor score
Editor's Choice
NETGEAR CM1150V
DOCSIS 3.1
Xfinity voice
Up to 800 Mbps
Two phone lines
Four 1G ports
4.1Editor score
ARRIS SURFboard SVG2482AC
DOCSIS 3.0
Xfinity voice
Up to 800 Mbps
AC2350 Wi-Fi
Four 1G ports
4.2Editor score
Hitron CODA56
DOCSIS 3.1
Cable internet only
Up to 2.5 Gbps
2.5 Gbps Ethernet
Router required
4.4Editor score
NETGEAR Nighthawk CAX30
DOCSIS 3.1
AX2700 Wi-Fi 6
Up to 800 Mbps
Four 1G ports
No bundled voice
4.1Editor score
NETGEAR CM2050V
DOCSIS 3.1
Xfinity voice
Up to 2.5 Gbps
Two phone lines
2.5 Gbps Ethernet
4.0Editor score
NETGEAR CM3000-1AZNAS
DOCSIS 3.1
Mid/high split
Up to 2 Gbps
2.5 Gbps Ethernet
No bundled voice
4.2Editor score
NETGEAR CM3000
DOCSIS 3.1
Mid/high split
Up to 2.5 Gbps
1 Gbps upload
Link aggregation
4.3Editor score
NETGEAR CM2500-1AZNAS
DOCSIS 3.1
Mid/high split
Up to 2 Gbps
1 Gbps upload
No Xfinity voice
4.3Editor score
1. NETGEAR CM1150V – Best Overall Modem with Telephony
NETGEAR Nighthawk CM1150V
DOCSIS 3.1
Xfinity voice support
Two telephone lines
Four Gigabit ports
2G link aggregation
The NETGEAR Nighthawk CM1150V is a well-rounded dedicated cable modem for Xfinity subscribers who need internet and digital voice service. It carries a 4.1 rating and stands out with certified support for Xfinity Internet and Voice plans up to 800 Mbps. Its two-phone-line capability and enhanced call features make it particularly relevant to households that still rely on traditional home calling.
Pros
- Certified Xfinity voice support
- Strong 32×8 bonding
- Four wired connections
- Enhanced calling features
- Flexible router pairing
Cons
- Separate router generally needed
- Maximum plan differs from newest models
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The modem uses DOCSIS 3.1 with 32×8 channel bonding, OFDM 2×2 upstream technology, and four Gigabit Ethernet ports. That combination gives users multiple ways to connect computers, printers, game consoles, and a separate Wi-Fi router. Link aggregation can combine two 1G ports into a 2G connection when the paired router and service support that arrangement.
Its principal limitation is that it does not include Wi-Fi, so a router is needed for a wireless home network. Its listed plan ceiling of 800 Mbps also makes it less forward-looking than dedicated voice models designed for multi-gig service. Even so, those constraints are reasonable for customers whose current Xfinity tier and home-networking equipment do not require more bandwidth.
This is the strongest all-around choice in the roundup for Xfinity Voice customers who want current DOCSIS technology, several Ethernet connections, and genuine two-line telephony. It is especially appropriate for households with a router already in place or with a clear preference for a dedicated modem rather than a combined unit.
Telephone Service and Call Features
The CM1150V supports Xfinity Voice service with up to two telephone lines. It also provides enhanced features such as caller ID, three-way conference calling, and call forwarding, making it more useful than a plain internet modem when household calling remains important.
Flexible Wired Connectivity
Four Gigabit Ethernet ports allow several devices to connect without additional switches. The two-port link aggregation option can also create a faster wired path to a compatible router, helping preserve multi-gig performance where the user's service plan permits it.
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2. Arris TM3402 – High-Speed DOCSIS Telephony Option
Arris TM3402
DOCSIS 3.1
32×8 downstream
2×2 upstream
Telephony connection
No wireless hardware
The Arris TM3402 is a dedicated DOCSIS 3.1 telephony modem built around 32×8 downstream and 2×2 upstream channel configurations. Its 3.4 rating is the lowest among the listed products, but the underlying specification is capable for eligible cable networks. It also excludes wireless hardware, giving buyers who already own a router a focused and potentially uncluttered setup.
Pros
- Modern DOCSIS 3.1 platform
- High downstream channel count
- Telephony-focused model
- Compact dedicated design
- No unnecessary Wi-Fi
Cons
- Not supported by Cox
- Lowest listed rating
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The product's defining advantage is its combination of modern DOCSIS 3.1 technology and telephony support. The supplied listing specifically warns that it is not supported by Cox Cable, making provider verification essential. Shoppers should also confirm the service area, plan tier, voice activation process, and required phone connections with their provider before purchasing.
The lower rating and provider limitation make this model a less universally approachable recommendation than the leading Xfinity-focused picks. It also does not solve wireless networking by itself. However, those trade-offs may be acceptable for a customer whose provider supports the TM3402 and who prefers a dedicated cable modem with high channel bonding.
Consider the TM3402 if your cable provider explicitly lists it as compatible and your existing router can handle the available internet speed. Do not choose it as an interchangeable Cox modem, and verify voice availability before ordering. With those checks completed, its DOCSIS 3.1 foundation can serve as the core of a capable home network.
DOCSIS 3.1 Channel Capacity
The 32×8 downstream and 2×2 upstream configuration places this modem in the modern DOCSIS 3.1 category. Actual service depends on the provider's network, the customer's plan, and other network conditions.
Why Provider Verification Matters
The supplied data explicitly says the modem is not supported by Cox and may create return issues if purchased for that network. Checking the provider's approved-device list is therefore an essential part of selecting this product.
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3. ARRIS SURFboard SBV3202 – Best Budget Modem with Telephony
ARRIS SURFboard SBV3202
DOCSIS 3.0
Xfinity voice service
Up to 800 Mbps
Two telephony ports
Requires Wi-Fi router
The ARRIS SURFboard SBV3202 delivers the essential combination of Xfinity internet and voice service in a straightforward DOCSIS 3.0 package. Its 4.2 rating ties for the highest listed score, making it an appealing budget-focused option for households that do not need the newest channel bonding standard. It is approved for cable internet plans up to 800 Mbps.
Pros
- Strong customer rating
- Direct Xfinity voice support
- Two telephony ports
- Simple app-guided setup
- Useful for standard plans
Cons
- Older DOCSIS 3.0 standard
- No integrated Wi-Fi
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Two telephony ports support digital voice, while setup can be completed by plugging in the modem, downloading the SURFboard Central app, and following its activation instructions. The modem connects to a separate Wi-Fi router for household networking, so owners without suitable router hardware should include that need in their overall setup plan.
Its chief drawback is the use of DOCSIS 3.0 rather than DOCSIS 3.1. That makes it less attractive for subscribers seeking multi-gig service or greater future headroom. The absence of Wi-Fi also means it cannot serve as a complete one-box solution. Neither issue negates its value for customers with compatible, more modest service.
Choose the SBV3202 when you want an uncomplicated Xfinity Voice modem with a strong rating and your plan falls within its listed support range. It is a sensible pick for a basic home that already has a Wi-Fi router, while buyers planning rapid speed upgrades should consider a DOCSIS 3.1 alternative.
Straightforward Voice and Internet Setup
This model is intended specifically for Xfinity Internet and Voice Service. The guided SURFboard Central app helps simplify activation, while dedicated telephony ports keep voice connections integrated with the cable modem.
A Sensible Match for Standard Service
With support for plans up to 800 Mbps, the modem suits households whose current service does not require multi-gig throughput. Its rating of 4.2 adds confidence, but users should still consider future bandwidth needs before settling on DOCSIS 3.0.
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4. ARRIS SVG2482AC – Best Integrated Modem-Router for Voice
ARRIS SURFboard SVG2482AC
DOCSIS 3.0
AC2350 dual-band Wi-Fi
Xfinity voice support
Four Gigabit ports
Two telephony ports
The ARRIS SURFboard SVG2482AC combines a DOCSIS 3.0 cable modem, digital voice support, and an AC2350 Wi-Fi router in one enclosure. Its 4.2 rating places it among the strongest reviewed options. It is designed for Xfinity Internet and Voice service and supports cable internet plans up to 800 Mbps.
Pros
- Modem and router combined
- Integrated AC2350 Wi-Fi
- Xfinity voice compatibility
- Four wired connections
- App-based network management
Cons
- DOCSIS 3.0 limits headroom
- Wi-Fi 5 not Wi-Fi 6
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Integrating the router simplifies the number of boxes required and gives new users access to Wi-Fi without buying a separate router immediately. Four Gigabit Ethernet ports support wired devices, while two telephony ports handle digital voice. The SURFboard Central app guides activation and offers real-time device monitoring, parental controls, and network customization.
The trade-offs are clear. DOCSIS 3.0 is an older standard, and AC2350 represents Wi-Fi 5 rather than the newer Wi-Fi 6 or Wi-Fi 6E found in more recent equipment. Homes with demanding wireless coverage requirements may eventually want a newer standalone router, but this model remains convenient for smaller homes and straightforward Xfinity setups.
The SVG2482AC is best for an Xfinity customer who wants phone service and Wi-Fi in a single box without the complexity of separate networking equipment. It is less suitable for households expecting future multi-gig internet or modern Wi-Fi performance, but it offers a practical combination of voice, internet, and wireless connectivity.
One-Box Home Networking
Combining the cable modem and AC2350 router reduces the number of devices and cables needed for a basic home network. It also gives users an established Wi-Fi network directly from the SURFboard setup process.
Convenient Management Features
The SURFboard Central app supports guided installation, device monitoring, parental controls, and network customization. These features make ongoing administration more approachable for users who do not want to manage a more complex router.
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5. Hitron CODA56 – Best High-Speed Internet-Only Modem
Hitron CODA56
DOCSIS 3.1
Up to 2.5 Gbps
2.5 Gbps Ethernet
No built-in Wi-Fi
No telephony support
The Hitron CODA56 is a high-speed, internet-only cable modem with a 4.4 rating, the highest among the listed products. It supports DOCSIS 3.1 service up to 2.5 Gbps through a 2.5 Gbps Ethernet port and is described as compatible with major providers including Xfinity, Spectrum, and Cox.
Pros
- Highest listed rating
- Multi-gig Ethernet support
- Broad cable-provider compatibility
- Low-latency DOCSIS design
- Backward compatible
Cons
- Does not support telephony
- Requires separate Wi-Fi router
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This model is intended for fast cable plans and works backward with DOCSIS 3.0 networks. Its DOCSIS 3.1 foundation is designed for lower latency during gaming, streaming, and video calls. Setup still depends on cable service and ISP activation, while a separate router with a suitably fast port is needed to unlock the full potential of the connection.
Most importantly, this is not a telephony modem. It cannot provide digital phone service and does not work with fiber, DSL, satellite, or fixed wireless internet. The lack of built-in Wi-Fi also means it cannot immediately support a multi-device wireless household without additional hardware.
The CODA56 is an excellent choice for a customer who wants fast internet but does not need home voice service and already owns or plans to buy a capable router. It should not appear on a shortlist for traditional phone users, but within its internet-only category, its rating, multi-gig port, and broad cable compatibility make it a strong contender.
Multi-Gig Wired Performance
The 2.5 Gbps Ethernet port gives the CODA56 the capacity to feed a fast router or a direct wired device. Full multi-gig results still depend on the customer's plan, provider network, and the capabilities of the connected router.
Know When Voice Is Not Included
This model is expressly a cable internet device. If digital phone service is part of the search, buyers should move to an Xfinity Voice-certified product rather than assuming the CODA56's phone-line-like connections offer telephony.
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6. NETGEAR CAX30 – Best Wi-Fi 6 Modem-Router Combo
NETGEAR Nighthawk CAX30
DOCSIS 3.1
AX2700 dual-band Wi-Fi
Up to 800 Mbps
Four Gigabit ports
No bundled voice
The NETGEAR Nighthawk CAX30 combines a DOCSIS 3.1 cable modem with AX2700 dual-band Wi-Fi 6. Its 4.1 rating reflects a capable, modern all-in-one system for Xfinity, Spectrum, Cox, and other compatible cable providers. The supplied information lists Xfinity support up to 800 Mbps, Spectrum up to 1 Gbps, and Cox up to 1 Gbps.
Pros
- Modern Wi-Fi 6 integration
- Supports 25+ connected devices
- Broad cable provider support
- Four Gigabit Ethernet ports
- App-based management
Cons
- Not compatible with bundled voice
- Requires separate mesh for large homes
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Its dual-band Wi-Fi 6 radio is designed to cover approximately 2,000 square feet and support more than 25 connected devices, although actual results depend on the building and layout. Four Gigabit Ethernet ports serve desktop computers, consoles, and streaming devices. The Nighthawk app provides guided setup, speed testing, device pausing, and guest-network controls.
The most important limitation is voice compatibility. The CAX30 is not compatible with bundled voice plans, so customers who require digital telephone service must choose another product. While its integrated Wi-Fi avoids the need for a separate router, large homes may still benefit from a mesh system.
This is a good match for cable subscribers who want internet and modern Wi-Fi in one device but do not need telephony. Its DOCSIS 3.1 platform, app management, and Wi-Fi 6 coverage make it more future-facing than a DOCSIS 3.0 combination, while voice users should focus on the CM1150V or CM2050V.
Whole-Home Wi-Fi 6 Capability
AX2700 dual-band Wi-Fi 6 gives the CAX30 enough capacity for numerous phones, laptops, televisions, and smart-home devices. Coverage varies, so buyers with larger homes should consider whether the stated area will translate to good signal throughout their space.
Simple App-Based Control
The Nighthawk app helps users complete setup and manage Wi-Fi, guest access, connected devices, and speed tests remotely. The device also includes security features such as WPA3 encryption, firewall protection, and denial-of-service attack prevention.
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7. NETGEAR CM2050V – Best Premium Modem with Telephony
NETGEAR Nighthawk CM2050V
DOCSIS 3.1
Xfinity voice support
Up to 2.5 Gbps
Two telephone lines
2.5 Gbps Ethernet
The NETGEAR Nighthawk CM2050V is the premium choice for Xfinity Voice subscribers who want high-speed internet and two-line telephony in a dedicated modem. It carries a 4.0 rating and supports cable plans up to 2.5 Gbps through DOCSIS 3.1 technology. That makes it more future-oriented than the 800 Mbps voice models in the roundup.
Pros
- Multi-gig Xfinity compatibility
- Two-line voice support
- Dedicated 2.5G Ethernet
- Advanced call feature support
- Modern DOCSIS platform
Cons
- No integrated Wi-Fi
- Xfinity-focused compatibility
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The modem includes one 2.5 Gbps Ethernet port for connecting a capable Wi-Fi router, and the supplied data notes that it works especially well with Wi-Fi 6 or 7 routers and Orbi mesh systems. Phone customers can use up to two lines with enhanced features including caller ID, three-way conference calling, and call forwarding.
As a dedicated modem, it does not create a wireless network by itself. It is also certified for Xfinity Internet and Voice rather than fiber, DSL, DirecTV, or DISH networks, and it is made for use in the United States. Those constraints are appropriate for a specialty product aimed at a specific provider ecosystem.
Choose the CM2050V if your Xfinity plan is fast, digital phone service matters, and you already have a suitable router or plan to add one. It is the strongest choice here for combining advanced multi-gig internet with genuine telephony, although buyers with only standard plans may gain little practical benefit from the extra headroom.
Multi-Gig Internet with Voice
Few models in this roundup combine Xfinity Voice with support for plans up to 2.5 Gbps. The dedicated 2.5 Gbps Ethernet port gives the modem a direct path into a modern router without relying on older 1G-only connections.
Two Lines of Digital Calling
Up to two telephone lines and enhanced calling features make this model relevant for shared homes, home offices, and anyone who values a wired telephone option. Activation must be arranged through Xfinity Voice service.
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8. NETGEAR CM3000-1AZNAS – Best Flexible Multi-Gig Modem
NETGEAR CM3000-1AZNAS
DOCSIS 3.1
Mid/high split
Up to 2 Gbps
2.5 Gbps Ethernet
No bundled voice
The NETGEAR CM3000-1AZNAS is a high-performance DOCSIS 3.1 modem aimed at modern cable plans rather than traditional phone service. Its 4.2 rating is among the best in the group, and the supplied specifications indicate support for Xfinity, Spectrum, Cox, and most U.S. cable providers on plans up to 2 Gbps.
Pros
- Broad major-provider support
- Fast 2.5G Ethernet
- Mid/high split architecture
- Nighthawk app management
- OFDMA and AQM
Cons
- Not compatible with bundled voice
- Requires compatible router
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Its mid/high-split design supports faster downstream and upstream performance, which can benefit gaming, video conferencing, and large uploads. A 2.5 Gbps Ethernet port provides the main connection to a router, while the Nighthawk app assists with setup and management. OFDMA and Active Queue Management are intended to improve response times during congestion.
Crucially, the product is not compatible with bundled voice. Users who need digital telephone service must select a voice-certified alternative. It also requires a suitable Wi-Fi router, and real-world results depend on provider availability of mid/high split, the subscribed plan, and the paired networking equipment.
This is a strong choice for a cable customer who wants premium multi-gig capability and provider flexibility without needing a phone line. It is especially compelling for users with fast service, modern Wi-Fi equipment, or plans where upload speed is increasingly important. Voice customers should treat it as an internet-only option.
Mid/High-Split Performance
The split architecture can deliver stronger download and upload performance on networks equipped for it. Customers should confirm that their provider offers the relevant service in their area rather than relying only on the modem's maximum capability.
Built for Modern Routers
The 2.5 Gbps port avoids the bottleneck that a 1G connection could create on a multi-gig plan. Pairing it with a current high-speed router gives the network a clearer path from the provider's fastest tiers to connected devices.
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9. NETGEAR CM3000 – Best Upload-Focused DOCSIS Modem
NETGEAR CM3000
DOCSIS 3.1
2.5 Gbps download
1 Gbps upload
Three wired ports
No built-in Wi-Fi
The NETGEAR CM3000 is built for fast cable tiers and standout upstream performance. Its 4.3 rating is the second-highest in the roundup, and the supplied data lists up to 2.5 Gbps download with up to 1 Gbps upload through mid/high-split DOCSIS 3.1 technology. It supports Xfinity, Spectrum, and Cox networks and remains backward compatible with DOCSIS 3.0.
Pros
- Strong 4.3 customer rating
- Exceptional upload potential
- One 2.5G Ethernet port
- Link aggregation support
- Works with major providers
Cons
- No telephony service
- Requires separate Wi-Fi router
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One 2.5 Gbps Ethernet port serves as the high-speed connection to a router, while two additional 1 Gbps ports can provide flexibility. On a compatible router, link aggregation can combine those two ports for up to 2 Gbps of wired throughput. That architecture is well suited to gaming, 4K streaming, video calls, and heavy uploads.
It does not support bundled cable voice plans and has no built-in Wi-Fi, placing it outside the traditional telephony category despite its other strengths. A customer who wants phone service will need a different model. Users should also confirm that their provider offers the necessary mid/high-split service and compatible speed tier.
The CM3000 is a compelling recommendation for high-speed internet users who upload large files, operate cloud services, or need strong performance for simultaneous connections. It is less relevant to basic households and should not be purchased solely because of its maximum speed if the available service plan cannot use it.
Upload Performance for Creators and Teams
The listed 1 Gbps upload capability distinguishes this model from many conventional cable modems. It can suit remote workers, content creators, and households that routinely send large files while other devices are also online.
Flexible High-Speed Ports
The central 2.5 Gbps port supports a modern router, while the additional gigabit ports add wired options. Link aggregation can create an even faster path when the paired router supports the necessary configuration.
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10. NETGEAR CM2500-1AZNAS – Best Fast Cable Modem Without Voice
NETGEAR CM2500-1AZNAS
DOCSIS 3.1
Up to 2 Gbps
Up to 1 Gbps upload
Link aggregation support
No Xfinity Voice
The NETGEAR CM2500-1AZNAS is a fast DOCSIS 3.1 mid/high-split modem for internet-only cable service. Its 4.3 rating gives it one of the strongest overall scores in the group, while the supplied specifications list download speeds up to 2 Gbps and upload speeds up to 1 Gbps.
Pros
- Strong 4.3 customer rating
- Fast download and upload
- Major-provider compatibility
- Link aggregation capability
- Works with modern routers
Cons
- Incompatible with Xfinity Voice
- No integrated Wi-Fi
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It is described as compatible with major U.S. providers, including Xfinity, Spectrum, and Cox. For the best results, it can be paired with a NETGEAR Wi-Fi 6E or Wi-Fi 7 router or an Orbi system. Two Gigabit Ethernet ports can also be linked on a compatible router to support up to 2 Gbps of wired throughput.
The defining limitation is explicit incompatibility with Xfinity Voice plans. Even though the modem belongs to the same broad product category, it cannot satisfy a household's digital phone requirements. It also requires separate wireless hardware and provider activation. Real performance depends on service availability and the customer's plan.
Choose the CM2500-1AZNAS for a fast, modern internet-only setup with strong provider flexibility and upload capability. If phone service is essential, choose the CM1150V for an 800 Mbps voice-certified option or the CM2050V for a multi-gig voice-capable alternative.
Fast Upload for Connected Homes
Up to 1 Gbps upload can improve cloud backups, video calls, remote access, and simultaneous uploads. The benefit is meaningful only where the provider supplies a compatible mid/high-split plan.
A Clear Voice-Exclusion Warning
The supplied data states that this model is not compatible with Xfinity Voice plans. Treat that limitation as decisive for any shopper who wants digital calling from the same cable provider.
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Buying Guide – How to Choose the Best Modem with Telephony
Choosing a cable modem with telephony requires matching the device to your provider, internet tier, telephone needs, and existing network equipment. The most important rule is simple: advanced specifications cannot overcome an incompatibility with your cable network or voice package.
Provider and Plan Compatibility
Begin with the provider's approved equipment list rather than comparing speed figures alone. Several products here are specifically certified for Xfinity Internet and Voice, while others support Xfinity, Spectrum, and Cox internet service without bundled phone service. The Arris TM3402 is specifically not supported by Cox, and several NETGEAR mid/high-split products explicitly exclude bundled voice. These are decisive distinctions because the most advanced modem cannot activate an unsupported service.
Check both your provider and the exact speed tier available at your address. Some modem specifications refer to the theoretical maximum the hardware can support, while actual availability depends on network upgrades, local plant equipment, and the plan chosen. Ask the provider whether the modem is approved for your location before ordering.
Telephone Line and Call Features
Traditional home calling places a different requirement on a modem than basic internet access. The ARRIS SBV3202 and SVG2482AC each list two telephony ports for Xfinity Voice, while the NETGEAR CM1150V and CM2050V support up to two telephone lines. The CM1150V and CM2050V also list enhanced services such as caller ID, call forwarding, and three-way conference calling.
Consider whether your household needs one line, two lines, or simply no phone service. A modern wireless calling app may handle mobile calls, but it does not replace the reliability of a wired home phone line in some households. Confirm activation requirements and any service fees directly with the telephone provider.
DOCSIS Generation and Channel Bonding
DOCSIS 3.0 products in this list, including the ARRIS SBV3202 and SVG2482AC, remain practical for service up to their listed plan limits. DOCSIS 3.1 models add newer downstream and upstream technology designed for faster tiers and better handling of crowded networks. The CM1150V uses 32×8 bonding with 2×2 OFDM, while the Arris TM3402 also describes a 32×8 and 2×2 configuration.
Newer does not automatically mean better for every household. A DOCSIS 3.1 modem is valuable when the provider offers a qualifying plan or when future upgrades are likely. For a basic connection, a well-supported DOCSIS 3.0 voice modem can provide the required service without unnecessary complexity.
Multi-Gig Ethernet Capability
The fastest internet plan is only useful when the modem can pass that speed to the router and then to devices. The Hitron CODA56, NETGEAR CM2050V, CM3000, and CM3000-1AZNAS feature 2.5 Gbps Ethernet connections. The CM1150V offers four 1G ports plus link aggregation, which can combine two ports into a 2G connection when the router supports it.
A 2.5 Gbps port is particularly relevant for users with multi-gig service, but it does not guarantee multi-gig Wi-Fi. The connected router, internal network cabling, device capabilities, and the provider's speed tier must all support the desired result. Never purchase a multi-gig modem solely for its headline number if the rest of the system cannot use it.
Built-In Wi-Fi Versus Separate Router
The ARRIS SVG2482AC includes an AC2350 Wi-Fi router, while the NETGEAR CAX30 combines a modem with AX2700 Wi-Fi 6. These can reduce equipment complexity and make activation easier. Dedicated models such as the SBV3202, CM1150V, CM2050V, CODA56, CM3000-1AZNAS, CM2500-1AZNAS, and CM3000 require a separate router for wireless access.
Separate equipment often provides more choice, easier upgrades, and stronger Wi-Fi options. It also means another device to configure and maintain. Consider the size of your home, number of connected devices, need for mesh nodes, and willingness to manage two boxes rather than judging only by the modem's speed class.
Wired Port Count and Link Aggregation
Four Gigabit Ethernet ports can simplify connections for a desktop, printer, game console, and router without an immediate switch. The CM1150V and SVG2482AC both provide four such ports. Multi-gig models such as the CM3000 use a 2.5 Gbps port alongside two 1 Gbps ports, with link aggregation available on compatible router combinations.
Link aggregation is not the same as a universally supported 2 Gbps port. Both the modem and router must support the arrangement, and the provider's service must deliver the higher rate. If unsure, check the router documentation and provider configuration guide before assuming the feature will work.
Management Apps and Security Features
The SURFboard Central app supports activation, monitoring, and parental controls for the two ARRIS models. The NETGEAR Nighthawk app provides guided setup and remote management across several compatible devices. The CAX30 additionally lists WPA3 encryption, firewall protection, and denial-of-service attack prevention, with NETGEAR Armor available as a separate subscription after its trial.
Management software is especially helpful for households that want easy guest networks, device pausing, or remote troubleshooting. Security subscriptions should be evaluated separately from the hardware rather than treated as a permanent included feature. A stable app and clear controls can be more useful than an extra feature that is rarely needed.
Home Size and Wireless Coverage
A combined modem-router can provide a convenient starting point, but coverage depends on the building, router placement, and number of walls. The CAX30's AX2700 Wi-Fi 6 is listed as covering up to 2,000 square feet with capacity for more than 25 devices, with actual results varying by layout and materials. The SVG2482AC offers older AC2350 Wi-Fi 5, which may be adequate for a smaller home.
If reliable coverage is required throughout a large or multi-level property, a dedicated modem paired with a current router or mesh system may be the better approach. The modem performs the provider connection, while the router system manages wireless coverage and device capacity.
How to Use and Care for Your Modem with Telephony
Begin by confirming that the modem is approved for your cable provider, internet plan, and telephone package. Connect the coax cable and power, then follow the provider's activation process or the manufacturer's app. Voice service may require separate activation, and customers should use the correct line configuration provided by the provider.
Choose a central, ventilated location with a stable power connection and minimal interference from other electronics. Keep the device off carpets or enclosed surfaces, and avoid stacking it with equipment that generates substantial heat. Do not move a connected modem during activation, and restart it only after allowing the required startup time.
For modem-router combinations, create a secure Wi-Fi network and change any default administrative credentials. For dedicated modems, connect a suitable router to the appropriate Ethernet port and configure the router's WAN or Internet connection using the modem's address. Update router firmware, review connected devices periodically, and contact the provider before changing cables or resetting equipment if service stops working.
Frequently Asked Questions
Do I need a cable modem with telephony if I only use mobile phone service?
Usually not. If your household relies entirely on mobile calling and does not subscribe to a traditional home phone line, an internet-only cable modem can meet your needs. A device such as the Hitron CODA56 or NETGEAR CM3000 may be appropriate. Choose a voice-capable model only when your provider offers digital home calling that you actually want.
Which modem is the best choice for Xfinity Voice?
The ARRIS SBV3202 is a straightforward DOCSIS 3.0 option for Xfinity Internet and Voice plans up to 800 Mbps. The NETGEAR CM1150V adds DOCSIS 3.1, four Gigabit Ethernet ports, and link aggregation, while the CM2050V supports plans up to 2.5 Gbps. The best choice depends mainly on your service tier, router setup, and preference for future headroom.
Can one cable modem provide both internet and telephone service?
Yes, but only when the modem includes telephony hardware and the provider supports the corresponding voice service. The SBV3202, SVG2482AC, CM1150V, and CM2050V are presented as voice-capable options. Internet-only DOCSIS 3.1 modems cannot automatically provide telephone service merely because they have Ethernet or coax connections.
Do I need a separate Wi-Fi router with a DOCSIS 3.1 modem?
You do if the modem has no built-in Wi-Fi and you want a wireless network. The CODA56, CM2050V, CM3000, CM3000-1AZNAS, and CM2500-1AZNAS are dedicated modem designs. The CAX30 and SVG2482AC integrate Wi-Fi, which can simplify a basic setup but may offer less flexibility than a modern standalone router or mesh system.
Will a DOCSIS 3.1 modem improve my internet speed automatically?
Not necessarily. The modem must support your provider, plan, network equipment, and local service availability. A DOCSIS 3.1 device can provide additional headroom and improve performance on qualifying networks, but it cannot exceed the speed delivered by the provider. Your router, Ethernet cables, internal Wi-Fi, and connected devices can also limit the result.
Can I use a mid/high-split modem with any cable provider?
Not without checking. The supplied information for the CM3000-1AZNAS and CM2500-1AZNAS indicates support for major providers such as Xfinity, Spectrum, and Cox, but it also asks customers to confirm mid/high-split availability. Provider equipment lists and local plan details remain the deciding factors, even when a product is marketed as broadly compatible.
What is the difference between a cable modem and a modem-router combination?
A cable modem connects a coax-based internet service to your network. A modem-router combination also provides Wi-Fi and basic routing functions. Dedicated modems are often preferable when you already own a strong router, want to upgrade wireless equipment independently, or need advanced networking features.
How many phone lines do the leading telephony modems support?
The ARRIS SBV3202 and SVG2482AC each list two telephony ports for digital voice. The NETGEAR CM1150V and CM2050V also support up to two telephone lines and list enhanced calling features. Availability and activation of a second line depend on the provider's voice packages, so confirm that requirement before ordering.
Final Thoughts on Choosing the Best Modem with Telephony
The NETGEAR CM1150V is the most balanced all-around pick for Xfinity Voice customers, combining DOCSIS 3.1, two phone lines, enhanced calling features, four Gigabit Ethernet ports, and link aggregation. The ARRIS SBV3202 is the best budget-oriented option for standard Xfinity plans, while the CM2050V provides the premium combination of digital voice and service support up to 2.5 Gbps.
For shoppers who do not need traditional calling, the CODA56, CM3000, CM3000-1AZNAS, and CM2500-1AZNAS offer more advanced internet-only paths, including 2.5 Gbps Ethernet and mid/high-split architectures. The CAX30 is worth considering when integrated Wi-Fi 6 matters, and the SVG2482AC offers a more conventional modem-router approach with voice support.
Before making a final decision, verify the provider, exact plan, voice package, local service availability, and required router. Prices, provider rental charges, approved-device lists, and service tiers can change, so check current information at the time of purchase. The most capable option is only the right choice when it is fully compatible with the service entering your home.