Can a hotel get fast internet over coax cable?

Yes. DOCSIS delivers gigabit-class shared capacity over existing coax, enough for guest Wi-Fi and IPTV in most properties.

Does DOCSIS replace the TV signal on the coax?

No. Data and TV use different frequencies on the same cable, so both can run together, or TV can move entirely to IPTV.

Is DOCSIS 3.1 worth it over 3.0 for a hotel?

For new deployments, usually yes: more capacity, better upstream and a longer life.

What equipment is needed?

A CMTS or mini-CMTS in the equipment room and a cable modem (often with built-in Wi-Fi) in each room, plus any upgrades to splitters and amplifiers.

Is DOCSIS cheaper than rewiring?

Typically, because it avoids opening walls and taking rooms out of service. The saving depends on the building and the condition of the coax.

6 October 2026

DOCSIS for Hotels: Internet and IPTV Over the Coax You Already Have

DOCSIS (Data Over Cable Service Interface Specification) is the standard cable operators use to send internet over coaxial cable. Hotels use it to deliver guest internet, IPTV and casting to every room over the coax already installed for TV, avoiding the cost and disruption of rewiring with Ethernet or fiber.

Piotr Nowis

What is DOCSIS?

DOCSIS is the technology inside every cable modem. It carries two-way IP data over the same coaxial cable used for TV signals, on separate frequencies, so both can run on one cable. It is maintained by CableLabs and has several generations:

Version	Typical capacity	Notes
DOCSIS 3.0	Up to about 1 Gbps down with channel bonding	Widely deployed, mature, low cost
DOCSIS 3.1	Multi-gigabit down (up to 10 Gbps in theory), higher upstream	More efficient; the current choice for new hotel deployments
DOCSIS 4.0	Up to 10 Gbps down and 6 Gbps up	Operator-focused; rarely needed in a hotel

Real-world hotel throughput depends on the coax plant, the number of rooms per segment and the equipment. Hospitality DOCSIS systems commonly deliver close to 1 Gbps of shared capacity per segment (Teleste for example cites up to 960 Mbps total).

Why do hotels use DOCSIS?

Because rewiring is expensive. Many hotels built before the 2000s have coax to every room for TV but no Ethernet. Pulling new cable means opening walls and ceilings, taking rooms out of service and paying for labour, often floor by floor. DOCSIS reuses the existing coax, so:

Rooms stay sellable during the upgrade.
Capital cost is lower than a full structured-cabling project.
One cable carries TV, internet and IPTV at the same time.
Deployment is faster, because most work is in the equipment room, not the rooms.

How does a hotel DOCSIS network work?

Headend: a CMTS (Cable Modem Termination System), often a compact "mini-CMTS", in the equipment room converts IP traffic from the hotel network into DOCSIS signals on the coax.
Coax distribution: the existing cable, splitters and amplifiers carry the signal to each room. These may need checking or replacing, as old passives can limit frequencies.
In-room modem: a cable modem, often combined with a Wi-Fi access point, turns the signal back into Ethernet and Wi-Fi in the room.
Devices: guest phones and laptops connect to the in-room Wi-Fi. The TV or its set-top device, such as InnCable, connects to the modem by Ethernet.

DOCSIS vs other options for getting IP to the room

Option	Uses existing cable	Speed	Disruption	Best for
New Ethernet / fiber	No	Highest	High	New builds, full renovations
DOCSIS over coax	Yes (coax)	High, shared per segment	Low	Coax-only buildings keeping TV RF
G.hn / Ethernet-over-coax	Yes (coax, sometimes phone lines)	High, point-to-multipoint	Low	Smaller properties, simpler topologies
Wi-Fi only	No cable to room	Variable	Low	Where in-room APs aren't feasible

DOCSIS is strongest where coax already reaches every room and the hotel wants a mature, standards-based system with wide equipment choice.

What to check before choosing DOCSIS

Coax condition and topology: a site survey will show whether splitters, amplifiers and cable support the needed frequencies.
Rooms per segment: capacity is shared, so segment the plant for high-demand properties.
Upstream needs: video calls and uploads use upstream. DOCSIS 3.1 is better here.
Coexistence with TV RF: frequency plans must keep data and any remaining broadcast channels apart.
Future plans: if a full renovation is due within a few years, it may be better to pull Ethernet then.

DOCSIS and IPTV: running a modern TV system over coax

A modern hotel TV platform needs IP to each TV for the launcher, casting and PMS features. DOCSIS provides that without new cabling. The TV, or an InnCable behind it, connects to the in-room modem, and the TV system runs as it would on Ethernet. Guests get the same casting and interactive TV experience.

Innspire TV works on Ethernet, Wi-Fi and DOCSIS-over-coax networks, and our team can advise on the right approach for your building.

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Frequently asked questions

Can a hotel get fast internet over coax cable?: Yes. DOCSIS delivers gigabit-class shared capacity over existing coax, enough for guest Wi-Fi and IPTV in most properties.
Does DOCSIS replace the TV signal on the coax?: No. Data and TV use different frequencies on the same cable, so both can run together, or TV can move entirely to IPTV.
Is DOCSIS 3.1 worth it over 3.0 for a hotel?: For new deployments, usually yes: more capacity, better upstream and a longer life.
What equipment is needed?: A CMTS or mini-CMTS in the equipment room and a cable modem (often with built-in Wi-Fi) in each room, plus any upgrades to splitters and amplifiers.
Is DOCSIS cheaper than rewiring?: Typically, because it avoids opening walls and taking rooms out of service. The saving depends on the building and the condition of the coax.