- Trending Categories
- Data Structure
- Operating System
- C Programming
- Social Studies
- Fashion Studies
- Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Data Over Cable Service Interface Specification (DOCSIS)
Data over cable service interface specification (DOCSIS) is an international telecommunications standard to provide high speed data to cable TV system over its existing hybrid fiber-coaxial (HFC) infrastructure. It is used for providing cable Internet access as well as supporting high definition televisions.
Versions of DOCSIS
DOSCIS 1.0 − It was the first version for cable modem system
DOSCIS 2.0 − It enhanced upstream data from computer to the operator to allow services requiring equal data transfer in both uplink and downlink, like IP telephony.
DOSCIS 3.0 − It supports IPv6 standard. It is marked by increase in transmission speed for both uplink and downlink.
DOSCIS 3.1 Full Duplex − It uses full cable spectrum simultaneously for both uplink and downlink data transfer.
Features of DOSCIS
Downstream data rate is typically 6MHz. Upstream data rate is upto 3.2MHz for DOCSIS 1.0 and 6.4MHz for later versions.
They use modulation techniques QAM-64 or QAM-256 for downlink and QAM-16, QAM-32 or QAM-64 for uplink.
For simultaneous multiple transmissions, time division multiple access (TDMA) and code division multiple access (CDMA) are used.
It supports channel bonding that allows a subscriber to use multiple downstream and upstream channels simultaneously.
It supports applications requiring low latency like Voice over IP.
DOCSIS modems are managed by IP addresses.DOCSIS 3.0 and above supports IPv6.
- Algorithm Specification-Introduction in Data Structure
- How can we create a Service Provider interface in Java 9?
- Display Java Specification Version
- Fiber Distributed Data Interface (FDDI)
- Difference between Twisted Pair Cable, Co-axial Cable and Optical Fibre Cable
- What are the differences between twisted pair cable, Optical fiber cable, and Coaxial cable?
- Coaxial Cable
- Cable Television
- Cable Internet
- Cable Modems
- Twisted-Pair Cable
- ADSL versus Cable
- How to use CRM data to improve customer service?
- Difference between specification and recommendation that introduced CSS
- Calling SAP Web Service to get data in Flash dashboard