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NETGEAR CM1200 DOCSIS 3.1 Cable Modem

DOCSIS 3.1 cable modem with four Gigabit Ethernet ports and manufacturer-supported multiport link aggregation for compatible provider service.

Original local schematic of the NETGEAR CM1200 showing coax and four Ethernet ports
UNIQUE LOCAL SVG // REFERENCE SCHEMATIC, NOT TO SCALE

EXACT MODEL / SKU: NETGEAR CM1200 (North American CM1200-100NAS family). Confirm complete suffix and hardware label before activation.

Exact specifications and compatibility

Model / SKUNETGEAR CM1200; retail model CM1200-100NAS.
Modem standardDOCSIS 3.1 with DOCSIS 3.0 backward compatibility; supports OFDM/OFDMA and bonded legacy channels per cable-system provisioning.
InterfacesCoaxial F-connector; 4 × 10/100/1000BASE-T Ethernet ports; link aggregation can combine designated ports with a compatible router/provider service.
Downstream / upstreamNETGEAR advertises up to 2Gb/s service capability with supported Ethernet link aggregation. DOCSIS 3.1 supports downstream OFDM and upstream OFDMA; upload rate and channel profile are provider-assigned, not a fixed modem guarantee.
Telephone serviceNo telephone ports and no eMTA voice functionality. A provider's bundled voice service needs a separate compatible voice modem.
Provider compatibilityNETGEAR lists major US cable providers (including Xfinity, Spectrum and Cox), but approval, supported tier, aggregation feature and activation depend on provider policy and the exact SKU.
Firmware / host compatibilityCable operator provisions DOCSIS firmware and channel configuration. No PC-specific modem driver; link aggregation requires a compatible router and provider configuration. Check operator firmware support before purchase.
Power and safety12V DC, 1.5A adapter per NETGEAR specifications. Use the supplied approved adapter, place on a stable ventilated indoor surface, keep dry and do not cover or open the enclosure.

Model-specific notes

The aggregate Ethernet feature does not create a faster single-client interface by itself; provider provisioning and compatible aggregation at the router end are required. Nominal link and plan rates are not measured throughput.

Manufacturer specifications and manual

  1. NETGEAR CM1200 official data sheetManufacturer specification for port count, DOCSIS standard and supported service configuration.
  2. NETGEAR CM1200 User ManualManufacturer-hosted setup, Ethernet aggregation, safety and troubleshooting instructions.
  3. NETGEAR CM1200 support and downloadsOfficial support and provider-compatibility route for the model.