Product specifications

40
SYSTEM
DIAGNOSTIC
System Diagnostic has two functions: Loopback test and BER test.
SYSTEM DIAGNOSTIC Î DIAG LOOPBACK
DIAG
LOOPBACK
SYSTEM DIAGNOSTIC Î DIAG BER TEST
DIAG
BER TEST
3.7.1 Loopback Test
Note : No SYSTEM DIAGNOSTIC menu is available on the Ethernet Interface Model
For E1 Interface model as CO side, there have: local digital, local, remote line, remote payload, farend line
and farend payload.
For Data Interface model as CO side, there have: Local digital, local, remote line, remote payload, farend line,
farend payload and V.54.
For E1 Interface model as CPE side, there have: local digital, remote line, remote payload, farend line and
farend payload.
For Data Interface model as CPE side, there have: Local digital, remote line, remote payload, farend line,
farend payload and V.54.
If the device hasn’t connected or is still under handshaking, there will not be any farend line, farend payload
or V.54 loopback available.
Definition of V.54
An ITU standard (1976) for various loopback tests that can be incorporated into modems for testing the
telephone circuit and isolating transmission problems.
Operating modes include local and remote digital loopback and local and remote analog loopback.