NETGEAR
NETGEAR Nighthawk Cable Modem WiFi Router Combo with Voice C7100V
Bottom line: The NETGEAR Nighthawk Cable Modem WiFi Router Combo with Voice C7100V: Replaces modem, AC1900 router, and Xfinity Voice adapter in one box; main trade-off: locked to Xfinity Voice plans, useless on non-Comcast providers.
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Pros & Cons
Pros
- ✓ Replaces modem, AC1900 router, and Xfinity Voice adapter in one box
- ✓ Carries 2 VoIP phone lines, rare on retail cable modems
- ✓ DOCSIS 3.0 bonding rated up to 24x faster downloads than DOCSIS 2.0
- ✓ 4 Gigabit Ethernet ports for wired PCs, consoles, and NAS
- ✓ Optional battery backup gives 8 hrs standby, 5 hrs talk in an outage
Cons
- ✗ Locked to Xfinity Voice plans, useless on non-Comcast providers
- ✗ Capped at 600Mbps, so gigabit and multi-gig tiers are out of reach
- ✗ DOCSIS 3.0 only, no 3.1 support for future Xfinity speed upgrades
- ✗ AC1900 is WiFi 5, behind WiFi 6 and 6E routers at this price
Manufacturer description
The NETGEAR Nighthawk C7100V is a three-in-one DOCSIS 3.0 cable modem, AC1900 WiFi router, and Xfinity Voice adapter, built to replace the rental gateway on Comcast Xfinity plans up to 600Mbps. If you pay a monthly equipment fee for a modem that also carries your phone lines, this NETGEAR Nighthawk combo consolidates all three jobs into one box. DOCSIS 3.0 channel bonding delivers up to 24x faster download speeds than DOCSIS 2.0, which is enough headroom for 4K streaming on several screens, large game downloads, and low-latency online play at the same time. Two Voice over IP ports handle two…
SpecPicks Verdict
SpecPicks scored NETGEAR Nighthawk Cable Modem WiFi Router Combo with Voice C7100V using a rating × review-volume × price-fit model applied to published specs and reviews across the networking category. NETGEAR's networking lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for networking of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Frequently Asked Questions
Will the C7100V work with my internet provider?
It is built for Xfinity cable and voice plans up to 600Mbps. NETGEAR lists Xfinity compatibility only for the voice features, so confirm with your provider before buying if you are not on Comcast.
Does this replace my Xfinity rental equipment?
Yes. It combines a DOCSIS 3.0 cable modem, an AC1900 WiFi router, and the Xfinity Voice adapter in one unit, so it covers all three functions a rental gateway provides.
How many phone lines does it support?
Two. The unit has 2 Voice over IP ports, so you can run two separate phone lines through your Xfinity Voice plan.
Do phones still work during a power outage?
Only with the optional battery backup, which is sold separately. NETGEAR rates it at up to 8 hours of standby time and up to 5 hours of talk time.
What ports and computers does it support?
Four Gigabit Ethernet ports plus 2 USB ports. Setup works on Windows XP through 8, macOS, UNIX, or Linux using Internet Explorer 5.0, Firefox 2.0, Safari 1.4, Chrome 11.0 or newer.
Key Features
- Compatible with Xfinity Cable & Voice Plans up to 600Mbps speed.
- Three-in-one DOCSIS 3.0 Cable Modem + AC1900 WiFi Router+ Xfinity Voice and 2 USB ports
- DOCSIS 3.0 unleashes 24x faster download speeds than DOCSIS 2.0
- Ideal for streaming 4K HD videos, faster downloads, and high-speed online gaming.Optional battery backup for power outages with up to 8 hours of standby and 5 hours of talk time
- 2 Voice over IP (VoIP) Ports and 4 Gagabit Ethernet Port.System Requirements:Microsoft Windows 7, 8, Vista, XP, 2000, Mac OS, UNIX, or Linux.Microsoft Internet Explorer 5.0, Firefox 2.0, Safari 1.4 or Google Chrome 11.0 browsers or higher
Full Specifications
| Brand | NETGEAR |
|---|---|
| Color | Black |
| Coverage | Wide |
| Frequency | 5 GHz |
| Model Name | C7100V-100NAS |
| Unit Count | 1 Count |
| Antenna Type | Internal |
| Connectivity | USB, WiFi |
| Model Number | C7100V-100NAS |
| Compatibility | Mac, Linux |
| Built-In Media | Ethernet cable, Nighthawk AC1900 WiFi Cable Modem Router with Voice (C7100V), Power cord, Quick install guide, Telephone cable |
| Control Method | App |
| Item Type Name | NETGEAR C7100V-100NAS Nighthawk AC1900 Wi-Fi Cable Modem Router For XFINITY Internet & Voice, Black |
| Controller Type | App Control |
| Mfr Part Number | C7100V-100NAS |
| Number of Ports | 4 |
| Special Feature | Beamforming, Guest Mode, LED Indicator, WPS |
| Antenna Location | Gaming |
| Wi-Fi Generation | Wi-Fi 5 |
| Security Protocol | WEP, WPA-PSK, WPA2-PSK |
| Full listing title | NETGEAR Nighthawk Cable Modem WiFi Router Combo with Voice C7100V - Supports Xfinity Cable & Voice Plans Up to 600Mbps, 2 Phone Lines, AC1900 WiFi Speed, DOCSIS 3.0 |
Ready to buy?
NETGEAR Nighthawk Cable Modem WiFi Router Combo with Voice C7100V - Supports Xfinity Cable & Voice Plans Up to 600Mbps, 2 Phone Lines, AC1900 WiFi Speed, DOCSIS 3.0 is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
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