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Data Network Terminal Single-port and Multiport Operating Instructions
54 (128) © Nokia Corporation DN01145897
Nokia Proprietary and Confidential Issue2-0en
Figure 29. Local test loop in a port
Figure 30. Network test loop (single-port)
Figure 31. PRBS (2
9
-1) test (transmitter/receiver)
PORT 1
DTE
PORT 2
DTE
PORT 3
DTE
REMOTE DNT
PORT 2
DTE
PORT 3
DTE
LOCAL DNT
DTE
PORT 2
DTE
PORT 3
DTE
LOCAL DNT
DTE
PORT 1
DTE
PORT 2
DTE
PORT 3
DTE
REMOTE DNT
PORT 1
DTE
PORT 2
DTE
PORT 3
DTE
REMOTE DNT
PORT 2
DTE
PORT 3
DTE
LOCAL DNT
DTE
Tx Rx