Hardware Architecture
Chapter 1 Overview
TA 102/202 Technical Support Guide
1-5
TA 102/202 eMTA Interfaces
An eMTA must interact and communicate with its environment so it can perform useful
tasks. It communicates with its environment through interfaces — electrical links that
connect two or more pieces of equipment together. The TA 102/202 eMTA provides four
interfaces for communicating with its environment. They are:
•
RF Interface
•
Ethernet Interface
•
USB Interface
•
POTS Interface.
The following sections explain the functions of TA 102/202 eMTA interfaces. Figure 1-4
identifies the interface connectors.
Figure 1-4
TA 102/202 eMTA Interface Connectors
RF Interface
Like a television set, an eMTA requires a tuner to receive information from a cable chan-
nel. But unlike the television set, the eMTA can transmit information to the cable chan-
nel, thus requiring a tuner that can send and receive digital information. The TA 102/
202 eMTA uses a specially designed tuner for subscriber side cable modem applications.
The tuner covers a frequency range from 50 to 860 MHz for down stream signals, 5 to 42
Mhz for TA 102 upstream signals and 5 to 65Mhz TA 202 upstream signals. RF Inter-
face (tuner) connection to the cable channel is through a 75 ohm “F” type connector.
The TA 102 eMTA is DOCSIS 2.0 certified and the TA 202 eMTA is Euro-DOCSIS 1.1
compliant.
RF INTERFACE
RJ-45 ETHERNET INTERFACE
USB INTERFACE
RJ-11 POTS INTERFACE
TA 102/202 eMTA
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