Nokia DNT2Mi sp/mp user manual Front, Automatic, panel, management, control, PRBS tests, 5,2,#,4

Maintaining DNT2Mi

Table 14.		Tests available for DNT2Mi (Continued)
	Front		Q1	Automatic	Note
	panel		management	control
PRBS tests	Port TR		Tx-Rx test (TR)		See Figure “PRBS (29-
ITU-T V.52 29-1 test pattern	test		(5,2,#,4)		1) test (transmitter /
Transmitter and receiver					receiver)” after this
					table.
towards the line.
Remotely controlled	Port RL			V.xx Circuit 140	Automatic control can
network test loop	test			or X.21 loop 2	be disabled by setting
ITU-T X.150 loop 2 at remote				command	circuit 140 in the ‘Not in
					use’ state at the local
end
					port.
Data coming from the line is
					Establishment of the
looped back to the line.
					requested loop can be
Activated at the local port
					disabled by setting
and a loop is established at
					“Remote loop not
the remote end.
					allowed” at the remote
					end.
					See Figure “Remotely
					controlled network test
					loop” after this table.
Remotely controlled	Port RLTR				Establishment of the
network test loop with	test				requested loop can be
PRBS test pattern					disabled by setting
ITU-T X.150 loop 2 at remote					“Remote loop not
					allowed” at the remote
end and ITU-T V.52 29-1 test
					end.
pattern
					See Figure “Remotely
Transmitter and receiver at
					controlled network test
the local port.
					loop with PRBS test
					pattern” after this table.

LOCAL DNT

REMOTE DNT

PORT 1

DTE

DTE	PORT 1	LINE
		BLOCK
	PORT 2
DTE
DTE	PORT 3

PORT 2

PORT 3

DTE

DTE

Figure 28. Network test loop (all ports)

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