Overview
The NETGEAR Nighthawk CM1100 is a DOCSIS 3.1 cable modem designed to deliver high-speed cable internet connectivity for compatible service providers. It supports multi-gig internet performance through Ethernet link aggregation, making it suitable for home networks and other setups that require reliable broadband access. The modem is also backward compatible with DOCSIS 3.0.
Key Features
- DOCSIS 3.1 Technology: Supports modern cable broadband networks and is backward compatible with DOCSIS 3.0.
- Multi-Gig Capability: Supports Ethernet link aggregation for a combined connection of up to 2 Gbps, subject to compatible equipment, ISP service, and network conditions.
- Dual Gigabit Ethernet Ports: Includes two 10/100/1000 Mbps Ethernet ports, with the second port used as part of a supported link aggregation setup.
- Broadband Channel Support: Supports 32 downstream and 8 upstream DOCSIS 3.0 channels, along with DOCSIS 3.1 OFDM/OFDMA technology.
- IPv6 Support: Supports IPv6 networking.
- Simple Setup: Designed for installation without a CD.
- Dedicated Modem Design: A separate Wi-Fi router is required for wireless networking.
Specifications
| Brand Name | NETGEAR CM1100 |
| Manufacturer | NETGEAR, Inc. |
| Model / MPN | CM1100 |
| Product Type | Multi-Gig Cable Modem |
| Modem Standard | DOCSIS 3.1, backward compatible with DOCSIS 3.0 |
| Downstream Channels | 32 DOCSIS 3.0 channels; DOCSIS 3.1 OFDM support |
| Upstream Channels | 8 DOCSIS 3.0 channels; DOCSIS 3.1 OFDMA support |
| Ethernet Ports | 2 × Gigabit Ethernet (10/100/1000 Mbps) |
| WAN Connection | Coaxial cable connection |
| Link Aggregation | Supported; compatible router or network equipment required |
| Network Protocol | IPv6 |
| Wi-Fi | Not built in; requires a separate wireless router |
| Flash Memory | 128 MB NAND |
| RAM | 256 MB |
| Power | External power adapter |
| Dimensions (L × W × H) | 8.8 × 5.9 × 3.4 inches (approx.) |
| Weight | 1.00 lb (460 g) |
Compatibility and Installation
The CM1100 is intended for compatible cable internet services. NETGEAR lists support or certification for providers including Xfinity, Cox, and Spectrum, but service availability and supported speed tiers vary by provider and location. Confirm compatibility with your ISP before purchasing. Connect the modem to the active coaxial cable outlet, power it on, and follow your provider's activation process. Connect a router or wired network device through Ethernet. To use link aggregation, both the modem and the connected router or network device must support compatible aggregation settings. This modem is not compatible with cable internet plans that require bundled telephone voice service. A separate router is required for Wi-Fi.
DC Supplies Product Note
DC Supplies provides product information to help customers identify networking equipment for their connectivity requirements. Please verify ISP compatibility, supported service speeds, and equipment requirements before ordering.
Frequently Asked Questions
1. What does the NETGEAR CM1100 do?
It connects a compatible cable internet service to a wired network or a separate router.
2. Does the CM1100 support DOCSIS 3.1?
Yes. It supports DOCSIS 3.1 and is backward compatible with DOCSIS 3.0.
3. Does this modem have built-in Wi-Fi?
No. A separate wireless router is needed to provide Wi-Fi connectivity.
4. Can the CM1100 provide multi-gig internet speeds?
It supports Ethernet link aggregation with compatible equipment. Actual throughput depends on the ISP plan, network setup, and supported aggregation configuration.
5. Will the CM1100 work with any internet provider?
No. It works with compatible cable internet providers. Check your provider's current modem compatibility list and supported speed tiers before purchasing.
6. What is included with the modem?
The manufacturer's listed package contents include the modem, an Ethernet cable, a quick installation guide, and a power adapter. Confirm package contents with the seller for the specific unit being supplied.
Official Documentation
Refer to the manufacturer's product documentation for specifications and compatibility details: NETGEAR CM1100 Official Data Sheet NETGEAR Support: Ethernet Ports
