ATLAS 550 System Manual Section 4, User Interface Guide
61200305L1-1F © 2002 ADTRAN, Inc. 171
The following loopback status messages may display:
Figure 13. HSSI Interface Loopback Test Diagram
LOCAL DTE
LOOPBACK
A local DTE Loopback occurs at the DTE port of the DCE, and is used
to test the link between the DTE and the DCE (NxT1 HSSI or NxT1
HSSI/V.35 Option Modules).
LOCAL LINE
LOOPBACK
A local line loopback occurs in the IMUX engine and is sued to test
functionality between the DTE and the IMUX engine.
REMOTE LINE
LOOPBACK
A remote line loopback occurs at the T1 interface and is used to test
functionality between the DTE and the T1 interfaces.