Cable Modems
A digital service offered by cable television companies
Data Over Cable Service Interface Specifications (DOCSIS)
- Most common protocol used for cable modems
- Not a formal standard
Offers vary (depends on the quality of cable plant)
- In theory: downstream: 27-55Mbps; upstream: 2-10 Mpbs
- Typical: downstream: 1.5 -2 Mbps; upstream 0.2 – 2 Mbps
- A few cable companies offer downstream services only
- Upstream communications using regular telephone lines