ARRIS SURFboard SBV3202
4.2Editor score
Xfinity voice service support
Two telephony ports
DOCSIS 3.0 connection
In this guide
A modem with telephony combines cable internet service with support for one or more traditional home telephone lines. The right model depends on provider approval, voice support, DOCSIS generation, Ethernet speed, and whether you also want the equipment to handle Wi-Fi. These choices affect compatibility as much as advertised performance.
We compared the ten available models by examining their supported providers, voice capabilities, DOCSIS standards, wired ports, wireless functions, and practical setup requirements. The list includes dedicated voice-enabled modems, all-in-one modem-router combinations, and high-performance cable-only modems that may require a separate router and are not appropriate for bundled telephone service.
Each review explains where the model fits best, along with the limitations that could affect your setup. Ratings reflect the supplied customer feedback, while technical details come from the listed product information. Product availability, provider plans, and prices can change, so confirm current compatibility before purchasing.
Top 3 Picks for Best Modem with Telephony
NETGEAR Nighthawk CM1150V
4.1Editor score
Two Xfinity phone lines
Four Gigabit Ethernet ports
DOCSIS 3.1 with 32×8
NETGEAR Nighthawk CM2050V
4.0Editor score
Multi-gig Xfinity voice support
Two telephone lines
One 2.5Gbps Ethernet port
Top 10 Best Modem with Telephony in 2026 Compared
This side-by-side comparison distinguishes voice-enabled Xfinity models from high-speed cable-only options, making provider compatibility, telephone support, DOCSIS generation, Wi-Fi, and Ethernet capabilities easy to assess.
ProductsSpecificationsEditor scorePrice
Best Budget
ARRIS SURFboard SBV3202
Xfinity Internet and Voice
DOCSIS 3.0 technology
Two telephony ports
Separate router required
4.2Editor score
Editor's Choice
Arris TM3402 Telephony
Telephony cable modem
DOCSIS 3.1 technology
32×8 and 2×2 channels
Not for Cox
3.4Editor score
Editor's Choice
NETGEAR CM1150V
Xfinity Internet and Voice
Up to two phone lines
DOCSIS 3.1 technology
Four Gigabit Ethernet ports
4.1Editor score
ARRIS SURFboard SVG2482AC
Xfinity Internet and Voice
Modem-router combination
AC2350 dual-band Wi-Fi
Two telephony ports
4.2Editor score
Hitron CODA56
Cable internet only
No telephone support
One 2.5Gbps Ethernet port
Separate router required
4.4Editor score
NETGEAR Nighthawk CAX30
Cable internet only
No bundled voice support
AX2700 Wi-Fi 6
DOCSIS 3.1 technology
4.1Editor score
NETGEAR Nighthawk CM2050V
Xfinity Internet and Voice
Up to two phone lines
One 2.5Gbps Ethernet port
DOCSIS 3.1 technology
4.0Editor score
NETGEAR Nighthawk CM3000-1AZNAS
Cable internet only
No bundled voice support
Mid and high-split design
One 2.5Gbps Ethernet port
4.2Editor score
NETGEAR Nighthawk CM3000
Cable internet only
No bundled voice support
Mid and high-split DOCSIS
Link aggregation support
4.3Editor score
NETGEAR Nighthawk CM2500-1AZNAS
Cable internet only
Not for Xfinity Voice
Mid and high-split design
Two Gigabit Ethernet ports
4.3Editor score
1. ARRIS SURFboard SBV3202 – Best Overall Modem with Telephony
ARRIS SURFboard SBV3202
Xfinity Internet and Voice
DOCSIS 3.0 connection
Two telephony ports
Plans up to 800Mbps
The ARRIS SURFboard SBV3202 is a dedicated Xfinity cable modem with integrated voice support and a supplied rating of 4.2. It combines DOCSIS 3.0 connectivity with two telephony ports, making it a practical option for Xfinity subscribers who want internet and traditional home calling without relying on a provider-supplied modem.
Pros
- Direct Xfinity voice support
- Simple app-guided setup
- Broadly available DOCSIS standard
- Useful gigabit wired connections
- Compact dedicated modem design
Cons
- Requires a separate Wi-Fi router
- Older DOCSIS 3.0 platform
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Its strongest feature is straightforward provider compatibility. The listed information identifies it for Xfinity Internet and Voice service and for cable plans up to 800 Mbps. Setup involves plugging in the modem, downloading the SURFboard Central app, and following the activation guidance. Because it is a modem rather than a combined router, it works well for households that already own a suitable Wi-Fi system or prefer to keep networking equipment separate.
The main trade-off is its DOCSIS 3.0 generation. While that remains a broadly available and reliable cable standard, the newest high-speed cable services and several newer models in this list use DOCSIS 3.1. It also does not include Wi-Fi, so every wireless device will need a router or access point. Those limitations keep it from being the strongest option for newer multi-gig plans, but they do not undermine its value for compatible Xfinity voice customers.
This is a strong recommendation for Xfinity households seeking a straightforward voice-enabled modem, especially when a separate router is already available or preferred. Confirm that your local Xfinity plan and voice service are supported, then compare it with newer DOCSIS 3.1 models if your provider offers substantially faster tiers.
Built for Familiar Xfinity Service
The SBV3202 is specifically listed for Xfinity Internet and Voice, reducing the uncertainty involved in buying a generic cable modem. Its two telephony ports also provide the physical connections needed for a traditional home telephone arrangement.
A Clean Fit for Separate Networking
Keeping the cable modem and Wi-Fi router separate can simplify upgrades and offer more flexibility in router placement. Connect the modem to a compatible router by Ethernet, then use the router for wireless coverage and device management.
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2. Arris TM3402 Telephony – Flexible DOCSIS 3.1 Telephony Option
Arris TM3402 Telephony
DOCSIS 3.1 connection
32×8 downstream bonding
2×2 upstream channels
Telephony cable modem
The Arris TM3402 Telephony is a DOCSIS 3.1 cable modem designed around a 32×8 downstream and 2×2 upstream channel configuration. Its supplied rating is 3.4, the lowest in this group, but that figure should be interpreted alongside its narrow compatibility and the limited product information available here.
Pros
- Newer DOCSIS 3.1 standard
- Dedicated telephony design
- 32×8 downstream bonding
- No built-in wireless required
- Compact cable modem format
Cons
- Not supported by Cox
- Lower supplied customer rating
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The model offers an attractive combination for eligible customers. DOCSIS 3.1 provides a more modern cable foundation than the SBV3202, while the 32×8 channel arrangement is designed for higher-capacity service. It is a modem only, so a separate router is necessary for wireless networking. That separation can be beneficial for users who already have a capable Wi-Fi system or want independent control over their router.
The decisive issue is provider compatibility. The supplied listing explicitly states that the TM3402 is not supported by Cox and warns against buying it for that provider, noting possible return complications. The product data does not clearly identify every supported voice provider, so buyers must verify the exact provider, plan, and telephone provisioning requirements before ordering. Its lower rating also warrants more cautious consideration.
The TM3402 is best for customers who have confirmed provider approval and want a newer DOCSIS 3.1 telephony platform. It is less suitable for Cox subscribers or anyone unable to verify voice compatibility in advance. Confirm the modem with the provider first, because telephone service can involve more restrictive certification and activation requirements than internet-only service.
Higher-Speed DOCSIS Foundation
The 32×8 downstream and 2×2 upstream configuration positions the TM3402 for modern cable service. It can pair well with a capable separate router, though actual availability depends on the provider's network and the customer's subscribed plan.
Provider Approval Comes First
A telephony modem must be accepted by the internet and telephone provider. The explicit Cox warning makes this especially important, and customers should also verify activation support for their particular voice service.
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3. NETGEAR Nighthawk CM1150V – Best Feature-Rich Xfinity Voice Modem
NETGEAR Nighthawk CM1150V
Xfinity Internet and Voice
Up to two phone lines
Four Gigabit Ethernet ports
DOCSIS 3.1 with 32×8
The NETGEAR Nighthawk CM1150V is a well-balanced voice-enabled cable modem for Xfinity, carrying a supplied rating of 4.1. It stands out by combining DOCSIS 3.1 processing with support for up to two telephone lines, four Gigabit Ethernet ports, and enhanced calling functions.
Pros
- Newer DOCSIS 3.1 standard
- Supports two phone lines
- Four Gigabit Ethernet ports
- Enhanced calling features
- Optional Ethernet link aggregation
Cons
- Separate router still required
- Limited to listed Xfinity plans
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Its connectivity options are more flexible than those of a basic voice modem. Four Gigabit ports can connect a separate Wi-Fi router, desktop, printer, game console, and other networked equipment without requiring an additional switch. Link aggregation can combine two suitable one-gigabit Ethernet links into a two-gigabit connection when the paired equipment supports that arrangement.
As a modem-only product, it does not generate a Wi-Fi network. That is not necessarily a drawback: many households prefer a dedicated router with better wireless coverage or more advanced controls. The other limitation is provider scope. It is certified for Xfinity Internet and Voice plans listed up to 800 Mbps, and future Xfinity speed availability is subject to change. It is therefore not a universal choice for Cox, Spectrum, or other cable providers.
For an Xfinity subscriber who needs two lines and wants a newer modem without sacrificing Ethernet flexibility, the CM1150V is an excellent fit. It is also a sensible choice for people who already own a suitable router. Verify voice activation, line count, and plan eligibility before buying to ensure a smooth installation.
Telephone Service With Useful Features
Support for up to two lines and enhanced features such as caller ID, conference calling, and call forwarding makes the CM1150V appropriate for households that rely on conventional home calling. Provider provisioning remains essential for these functions.
Four Ports for Flexible Connections
The four Gigabit Ethernet ports make it easy to separate the router and several wired clients. Link aggregation adds another option for high-speed local networking when both the router and computer support the feature.
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4. ARRIS SURFboard SVG2482AC – Best Integrated Modem-Router for Voice
ARRIS SURFboard SVG2482AC
Xfinity Internet and Voice
AC2350 dual-band Wi-Fi
Two telephony ports
Four Gigabit Ethernet ports
The ARRIS SURFboard SVG2482AC is the most conventional all-in-one choice in the group, combining a DOCSIS 3.0 cable modem, AC2350 dual-band Wi-Fi router, and Xfinity voice support. Its supplied rating is 4.2, matching the SBV3202, and it is especially convenient for customers who want fewer devices.
Pros
- Combines modem and Wi-Fi router
- Direct Xfinity voice support
- App-guided network management
- Four Gigabit Ethernet ports
- Parental controls included
Cons
- Older DOCSIS 3.0 platform
- All-in-one design limits flexibility
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The integrated router means the package can provide internet, wireless connectivity, and digital voice without requiring a separate Wi-Fi device. Four Gigabit Ethernet ports support wired clients, while the SURFboard Central app guides activation and offers device monitoring, parental controls, time limits, and network pause options.
The limitation is that integration comes at the expense of flexibility and newer technology. DOCSIS 3.0 is dependable and widely supported, but it is not the newest standard represented here. Replacing only the router later would be more complicated than with a modem-only design, and the built-in AC2350 router may not match the coverage or features of a premium standalone mesh system.
The SVG2482AC is a strong recommendation for Xfinity subscribers who want telephone service and straightforward Wi-Fi from one unit. Choose it when simplicity and fewer cables matter more than access to the newest cable standard. If you already own a strong router, however, the separate SBV3202 or CM1150V may offer a cleaner division of equipment.
One Device for Three Core Services
The combination of modem, router, and digital voice support reduces setup complexity and shelf space. It can be an especially attractive arrangement for a smaller home or a straightforward network with modest wireless requirements.
App-Based Household Controls
The SURFboard Central app supports setup, connected-device monitoring, parental controls, time limits, and pausing internet access. These features make routine household network management more accessible.
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5. Hitron CODA56 – Best Multi-Gig Cable Modem Without Telephony
Hitron CODA56
DOCSIS 3.1 connection
One 2.5Gbps Ethernet port
Works with major cable providers
Separate router required
The Hitron CODA56 is a high-speed DOCSIS 3.1 cable modem with a 2.5 Gbps Ethernet port and a supplied rating of 4.4, the highest in this roundup. It is built for Xfinity, Spectrum, and Cox cable internet, but it is expressly an internet-only model rather than a modem with telephony.
Pros
- Highest supplied product rating
- Multi-gig Ethernet connectivity
- Works with major cable providers
- Backward compatible with DOCSIS 3.0
- Compact dedicated modem design
Cons
- Does not support telephony
- No built-in Wi-Fi
- Incompatible with fiber and DSL
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Its multi-gig port makes it relevant for households that want to take advantage of faster cable tiers without replacing their Wi-Fi system. A separate router with a suitable 2.5 Gbps port is required to realize the full potential of the connection. The modem also supports DOCSIS 3.0 networks, which can help with compatibility on provider systems that have not fully moved to the newest standard.
The critical limitation is that it cannot serve traditional Xfinity Voice customers. It also cannot replace fiber, DSL, satellite, or fixed-wireless service, and it does not create a Wi-Fi network by itself. These are not minor omissions; they define the product as a high-performance cable internet modem for customers whose telephone service is separate or unnecessary.
The CODA56 is recommended for cable subscribers with gigabit-class plans who already have or intend to buy a capable router. It is not appropriate for this guide's core voice-service requirement, despite being one of the strongest general cable modems here. Confirm that your provider supports the modem and that your router can handle the connection you want.
Multi-Gig for Modern Cable Plans
The 2.5 Gbps Ethernet port is the centerpiece of the CODA56. It provides a useful path to gigabit and faster service when paired with a compatible router, although actual internet throughput remains limited by the provider plan and network.
Know When Not to Buy
This modem is a poor match for anyone who needs integrated traditional telephone service. It also cannot accept fiber, DSL, satellite, or fixed-wireless service, so identify the type of internet connection before considering it.
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6. NETGEAR Nighthawk CAX30 – Best Wi-Fi 6 Modem-Router Combination
NETGEAR Nighthawk CAX30
DOCSIS 3.1 connection
AX2700 dual-band Wi-Fi 6
Four Gigabit Ethernet ports
Up to 25 connected devices
The NETGEAR Nighthawk CAX30 combines a DOCSIS 3.1 cable modem with AX2700 dual-band Wi-Fi 6 and has a supplied rating of 4.1. It is designed for modern cable internet households that want one unit to handle both provider connection and home networking.
Pros
- Modern Wi-Fi 6 included
- Broad major-provider support
- Nighthawk app management
- Four Gigabit Ethernet ports
- DOCSIS 3.1 performance headroom
Cons
- Not compatible with bundled voice
- Coverage depends on home layout
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The listed provider support includes Xfinity, Spectrum, and Cox at specified plan tiers. Wi-Fi 6 coverage is stated at up to 2,000 square feet with capacity for more than 25 connected devices, although actual performance depends on the building, room layout, and number of active clients. Four Gigabit Ethernet ports provide dedicated connections for consoles, desktops, and streaming devices.
Its crucial limitation is the exclusion of bundled voice plans. The CAX30 is appropriate for internet-only service and explicitly not for bundled telephone offerings. Users who need Xfinity Voice should choose one of the voice-certified models instead. Another consideration is that a single router may not provide uniform wireless coverage in a large or multi-floor home, where a mesh system or access points could be preferable.
The CAX30 is a compelling pick for cable subscribers who want current Wi-Fi technology without maintaining separate modem and router units. It balances useful DOCSIS 3.1 headroom with convenient Nighthawk app controls. Ensure that your plan is internet-only and compatible before buying, and consider the home's layout when determining whether the built-in radio will provide adequate coverage.
Current Wi-Fi in One Unit
AX2700 dual-band Wi-Fi 6 makes the CAX30 a more current all-in-one choice than older DOCSIS 3.0 modem-router combinations. It is suitable for many moderate-sized homes where avoiding a separate router simplifies the installation.
Useful App-Based Management
The Nighthawk app supports guided setup, speed testing, Wi-Fi management, pausing devices, and guest-network creation. The product also lists security features such as WPA3 encryption, firewall protection, and denial-of-service attack prevention.
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7. NETGEAR Nighthawk CM2050V – Best Premium Modem with Telephony
NETGEAR Nighthawk CM2050V
Xfinity Internet and Voice
Plans up to 2.5Gbps
Up to two phone lines
One 2.5Gbps Ethernet port
The NETGEAR Nighthawk CM2050V is the premium voice-focused option in this guide, combining Xfinity Internet and Voice support with DOCSIS 3.1 and a 2.5 Gbps Ethernet port. Its supplied rating is 4.0, and its defining advantage is the ability to combine faster cable service with traditional calling.
Pros
- Multi-gig voice-enabled platform
- Supports two phone lines
- Enhanced calling features
- Fast 2.5Gbps Ethernet
- Works with modern routers
Cons
- Xfinity service required
- Separate router needed
- Not intended for fiber or DSL
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The modem supports up to two telephone lines and enhanced features including caller ID, three-way conference calling, and call forwarding. Its 2.5 Gbps port is designed for high-speed local connections to a modern router, while the supplied information recommends a Wi-Fi 6 or Wi-Fi 7 router or an Orbi mesh system for the best overall wireless experience.
As a premium, specialized device, it comes with strict limitations. It is certified for Xfinity Internet and Voice service, not for fiber, DSL, DirecTV, DISH, or competing cable providers. It also lacks integrated Wi-Fi, so it cannot serve as a complete home-network solution by itself. The requirement to pair it with capable networking equipment can increase the total setup complexity.
The CM2050V is the best choice for an Xfinity Triple Play or comparable voice customer who wants the fastest listed voice-enabled modem and plans to use a strong separate router. It is less appropriate for internet-only households or users who prefer a single integrated unit. Verify local plan availability, voice activation, and router compatibility before purchasing.
Multi-Gig With Telephone Support
Few cable modems combine a 2.5 Gbps connection path with two lines of traditional voice service. This pairing makes the CM2050V particularly relevant to homes that need both faster internet and reliable home calling.
Designed for a Strong External Router
The modem is intended to work with a separate Wi-Fi 6 or Wi-Fi 7 router or Orbi system. This separation can produce better wireless coverage and easier router upgrades than an all-in-one design.
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8. NETGEAR Nighthawk CM3000-1AZNAS – Best Upload-Focused Cable Modem
NETGEAR Nighthawk CM3000-1AZNAS
Mid and high-split DOCSIS
Plans up to 2.5Gbps
One 2.5Gbps Ethernet port
Broad cable provider support
The NETGEAR Nighthawk CM3000-1AZNAS is a DOCSIS 3.1 mid/high-split modem aimed at users who need more upload capacity as well as fast downloads. It has a supplied rating of 4.2 and supports major cable providers including Xfinity, Spectrum, and Cox, subject to plan and network availability.
Pros
- Improved upstream capacity
- Broad cable-provider compatibility
- Multi-gig Ethernet connectivity
- Nighthawk app management
- Separate router flexibility
Cons
- Does not support bundled voice
- Requires provider availability
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Mid/high-split technology is particularly relevant to cloud storage, video conferencing, gaming, and remote access. The modem provides a 2.5 Gbps Ethernet port for connection to a suitable router, plus guidance for using compatible router ports to obtain higher combined wired throughput. A separate router or mesh system is required because the product does not include Wi-Fi.
It is not a voice modem and explicitly does not support bundled voice. Customers who want traditional Xfinity telephone service should not choose it without confirming an alternative voice solution. The speed claims also depend on whether the provider offers the required mid-split service in the customer's area and whether the subscribed plan includes the corresponding upload speeds.
This model is recommended for internet-only cable customers with heavy upload activity or plans that use mid/high-split technology. Its provider flexibility and multi-gig port make it a strong performance option, but telephony is its defining exclusion. Confirm local network availability, plan eligibility, and router support before making a final decision.
More Capacity for Uploads
A stronger upstream path can improve the experience of cloud backups, large file transfers, video calls, and security-camera access. The benefit is most apparent when the provider actually offers a mid/high-split plan in the area.
Pairing Matters
A multi-gig modem cannot deliver its full potential through an older router. Confirm that the paired router has a compatible 2.5 Gbps port and can make use of the available bandwidth.
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9. NETGEAR Nighthawk CM3000 – Best High-Speed Internet Modem
NETGEAR Nighthawk CM3000
Mid and high-split DOCSIS
Up to 2.5Gbps downloads
One 2.5Gbps Ethernet port
Three wired Ethernet ports
The NETGEAR Nighthawk CM3000 is a high-performance, internet-only DOCSIS 3.1 cable modem with a supplied rating of 4.3. It is listed for Xfinity, Cox, and Spectrum and supports mid/high-split service, making it one of the strongest options for very fast cable plans without telephone support.
Pros
- High multi-gig download capacity
- Improved upload performance
- Link aggregation support
- Works with major cable providers
- DOCSIS 3.0 backward compatibility
Cons
- No bundled voice support
- Requires separate Wi-Fi router
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The modem is described as supporting up to 2.5 Gbps downloads and 1 Gbps uploads. Its networking hardware includes one 2.5 Gbps Ethernet port and two 1 Gbps ports that can use link aggregation for a combined 2 Gbps wired connection when the router supports that arrangement. DOCSIS 3.1 features such as Active Queue Management and OFDMA are intended to improve response times during busy periods.
The product has no built-in Wi-Fi, so it requires a separate router or mesh system. It also does not support bundled cable-voice plans, which is the most important distinction for shoppers searching specifically for telephony. Real-world performance will depend on the provider's network, the available plan, and the capabilities of the connected router.
The CM3000 is an excellent recommendation for cable households seeking top-tier internet performance and flexible wired connections. It is especially attractive to users who already plan to pair it with a Nighthawk Wi-Fi 6E or Wi-Fi 7 router or an Orbi system. For traditional home telephone service, choose a voice-certified model instead.
Speed for Heavier Digital Lifestyles
The combination of high download capacity and improved upload performance is useful for large households that stream, game, work remotely, back up files, and connect security devices at the same time. Provider availability determines how much of that potential becomes available.
Flexible Multi-Gig Wiring
The 2.5 Gbps port offers a direct path to a capable router, while link aggregation can combine the two one-gigabit ports. This gives advanced users options for high-speed local links and specialized network layouts.
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10. NETGEAR Nighthawk CM2500-1AZNAS – Best Wide-Provider Multi-Gig Modem
NETGEAR Nighthawk CM2500-1AZNAS
Mid and high-split DOCSIS
Up to 2Gbps downloads
Up to 1Gbps uploads
Two Gigabit Ethernet ports
The NETGEAR Nighthawk CM2500-1AZNAS is a DOCSIS 3.1 mid/high-split cable modem with a supplied rating of 4.3. It supports major United States cable providers, including Xfinity, Spectrum, and Cox, and is listed for plans up to 2 Gbps with upload capability up to 1 Gbps.
Pros
- Wide major-provider compatibility
- Strong upload-speed improvement
- Multi-gig cable performance
- Flexible external router pairing
- Link aggregation option
Cons
- Not compatible with Xfinity Voice
- No integrated Wi-Fi
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Its improved upload performance targets multi-family gaming, video conferencing, large uploads, security-camera access, and NAS use. Two Gigabit Ethernet ports can connect to a router with link aggregation for a combined 2 Gbps path, while the product is intended to be paired with a modern Wi-Fi 6E or Wi-Fi 7 router or Orbi system for whole-home coverage.
The essential caveat is that it is not compatible with Xfinity Voice plans. Anyone who needs traditional telephone service must choose a voice-certified modem instead. It also has no built-in Wi-Fi and cannot work with fiber, DSL, satellite, or fixed-wireless service. As with every multi-gig cable modem, real throughput depends on the provider's network and the paired router.
The CM2500-1AZNAS is a strong recommendation for internet-only cable subscribers who want broad provider flexibility and strong downstream and upstream performance. It is especially relevant to households that value uploading as much as downloading and already own capable networking equipment. Verify service type, voice needs, provider approval, and local plan availability before purchasing.
Fast Across Major Cable Networks
Support for Xfinity, Spectrum, and Cox makes the CM2500-1AZNAS appealing where the provider's service technology is available. Customers should still confirm approval and the specific plan tier associated with their address.
A Better Upload Experience
Higher upstream speeds can make remote work, backups, and camera access more responsive when used simultaneously. This is a meaningful advantage for users who previously relied on a standard DOCSIS connection with limited upload capacity.
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Buying Guide – How to Choose the Best Modem with Telephony
Choosing a cable modem with telephony starts with your provider and telephone requirements, then narrows to DOCSIS generation, supported plan, Ethernet speed, and Wi-Fi design. These factors determine whether a modem works, how quickly it performs, and whether additional equipment is needed.
Confirm Provider and Voice Compatibility
In short, telephone support is provider-specific, so verify both internet and voice eligibility before buying.
Determine the Required DOCSIS Generation
Match the modem's DOCSIS generation to your service plan and future upgrade path rather than choosing by specification alone.
Match the Ethernet Port to Your Plan
Check both ends of the connection: the modem port and the paired router must support the speed you want.
Decide Whether You Need Built-In Wi-Fi
Choose an all-in-one for simplicity, or a modem-only design for control over your router and wireless system.
Consider the Number of Telephone Lines
Most voice-capable choices here support up to two lines, so confirm your exact household line count with the provider.
Weigh Mid-Split Upload Performance
Prioritize upload speed for heavy cloud and collaboration use, but choose a voice-certified model if telephone service is essential.
Plan for Wireless Coverage and Management
Do not judge wireless range from a maximum area figure alone; consider the home's layout and the router features you need.
Review Setup and App Support
Prefer a model whose setup tools match your comfort level, while confirming that the provider supports the activation path.
How to Use and Care for Your Modem with Telephony
Before connecting the equipment, confirm that your home uses compatible cable internet and, when applicable, that the provider has approved both the modem and telephone service. Review the activation guide, gather the account information needed for internet and voice provisioning, and identify a central location with a properly installed coax connection and accessible power outlet.
Connect the coax cable to the modem, attach the approved phone lines to the appropriate telephony ports if the service uses traditional wiring, and power on the unit. For a modem-only model, connect an Ethernet cable from a suitable modem port to the WAN or Internet port of your router. Complete provider activation and the manufacturer's app-based setup before attaching computers, phones, televisions, and other clients.
After installation, use the modem and router interfaces to review connection status, telephone service, firmware status, and connected devices. Keep the equipment in a ventilated location away from direct heat, and avoid stacking it beneath paper or other objects. Do not unplug the modem frequently, and contact the provider or manufacturer if synchronization, voice provisioning, or service quality becomes unstable.
Frequently Asked Questions
Which modem in this guide supports Xfinity Voice?
The ARRIS SURFboard SBV3202, ARRIS SURFboard SVG2482AC, NETGEAR Nighthawk CM1150V, and NETGEAR Nighthawk CM2050V are explicitly listed for Xfinity Internet and Voice service. The CM1150V and CM2050V support up to two phone lines, while the ARRIS models list two telephony ports. Confirm approval for your exact plan and line configuration before purchasing.
Do I need a separate router for a modem with telephony?
It depends on the model. The SBV3202, CM1150V, and CM2050V do not include Wi-Fi, so they require a separate router for wireless access. The SVG2482AC and CAX30 include routers. Internet-only products such as the CODA56 and the high-speed NETGEAR Nighthawk modems also require separate Wi-Fi equipment.
Can a cable modem with telephony work with any internet provider?
No. Compatibility is provider-specific, especially for traditional voice service. The SBV3202 and CM2050V are identified for Xfinity, while the TM3402 is explicitly not supported by Cox. Always ask your provider to verify the modem model, internet plan, and voice feature set before placing an order.
Is DOCSIS 3.1 necessary for home telephone service?
No. The ARRIS SBV3202 uses DOCSIS 3.0 and supports Xfinity Internet and Voice, illustrating that a newer standard is not automatically required. A DOCSIS 3.1 voice modem may be preferable when your provider offers faster tiers, but the decisive factors are provider approval, plan support, and voice provisioning.
What is the difference between a cable modem and a modem-router combo?
A cable modem converts the provider's coax signal into an internet connection. A modem-router combo adds Wi-Fi and network-management functions in the same enclosure. Modem-only designs offer more freedom to choose or upgrade a router, while combos can reduce the number of devices and simplify initial installation.
Will a 2.5 Gbps modem improve my entire home network?
It can, but only when the service plan, provider network, modem port, and paired router all support the desired speed. Older Ethernet ports or Wi-Fi routers may limit the result. The modem improves the provider connection and local wired path, but wireless speeds also depend on the router and the devices using it.
Can I use these modems with fiber or DSL internet?
The products listed are cable modems, so they are not appropriate for fiber, DSL, satellite, or fixed-wireless service. The Hitron listing explicitly warns against those connection types. Check the actual type of service available at your address before considering any cable modem.
How many telephone lines can the recommended voice modems support?
The featured voice models generally list two telephone ports or support for up to two lines. The CM1150V and CM2050V also list enhanced calling features. If you need additional lines, have a complex telephone system, or use features not listed here, ask the provider about compatible equipment and activation.
Final Thoughts on Choosing the Best Modem with Telephony
The ARRIS SURFboard SBV3202 is the straightforward value choice for compatible Xfinity voice customers, while the NETGEAR Nighthawk CM1150V adds newer DOCSIS 3.1 technology, two phone lines, and four Gigabit Ethernet ports. The CM2050V is the premium voice-enabled selection for Xfinity customers who want multi-gig capability and plan to pair it with a modern router.
Prioritize provider and voice approval before comparing speed specifications. Then determine whether built-in Wi-Fi is useful, whether your service plan benefits from DOCSIS 3.1 or mid/high-split upload capacity, and whether the Ethernet ports match your router. For voice service, the SBV3202, CM1150V, SVG2482AC, and CM2050V are the models explicitly suited to Xfinity Internet and Voice.
The remaining products are excellent choices for particular internet-only situations but should not be mistaken for telephone-capable modems. Confirm the current product details, local provider support, and available plans before buying, and check current prices at the time of purchase because availability and pricing can change.