Chapter 1: Advanced Information
Illustrations contained in this document are for representation only.
9
Relationship among the Devices
This illustration shows a cable company that offers DOCSIS- and PacketCable-compliant
voice/data services.
What the EMTA Does
The EMTA provides high-speed Internet access as well as cost-effective, toll-quality telephone
voice and fax/modem services over residential, commercial, and education subscribers on
public and private networks via an existing CATV infrastructure. It can inter-operate with the
PacketCable compliant headend equipment and provide the IP-based voice communications.
The IP traffic can transfer between the EMTA and DOCSIS compliant headend equipment. The
data security secures upstream and downstream communications.
What the EMTA Needs to Do Its Job
The Right Cable Company:
Make sure your local cable company provides data services
that use cable TV industry-standard Euro-DOCSIS or DOCSIS-compliant and
Euro-PacketCable or PacketCable-compliant technology.
The Internet/Telephony Service Provider (ISP/TSP):
Your cable company provides you
access to an Internet Service Provider (ISP) and Telephony Service Provider (TSP). The ISP is
your EMTA to the Internet and provides you with a pipeline to access Internet content on the
