Installation and Operation Manual
Chapter
1 Introduction
ACE-3105, ACE-3205 Ver. 5.2
Functional Description
1-27
Figure
1-20. ETH Frames Handling in Bridge Mode
Physical Loopback Tests
ACE-3105, ACE-3205 supports two types of user-defined physical loopback
operations on ATM ports:
•
Internal loopback – returns the transmitted data at the physical layer to the
receive path. The internal physical loopback includes a configurable timeout
mechanism that ends the loopback operation after expiry of the user-defined
period.
•
External loopback – returns the received data at the physical layer to the
transmit path.
PHY
ATM
PHY
ATM
User Port
Network Port
Data path in internal loopback mode
Figure
1-21. Data Path in Internal Loopback Mode
