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8. Testing
8-10
March 2001
3160-A2-GB24-10
Payload Loopback (PLB)
The Payload Loopback command (PLB) loops the received signal on the network
interface back to the network. The signal is looped back as close to the DTE
Drop/Insert (DSX-1) port as possible (after it has passed through the framing
circuitry of the DSU/CSU). Framing CRCs and BPVs are corrected.
Procedure
To perform a Payload loopback:
1. From the top-level menu screen, select Test.
2. From the Test screen, select Lpbk.
3. From the Loopback screen, select PLB.
Test Started
appears on Line 2. If a Payload loopback is already in
progress, the
Already Active
message appears. If an invalid combination
of loopbacks is in progress, the error message
Invld Test Combo
appears
(see
Table 8-2, Valid Loopback Combinations
, for valid loopback test
combinations).
496-14316-02
CSU
DSU
NETWORK
INTERFACE
DTE
(DSX-1)
ALL 1s
PLB
PORT 1
PORT 2
ALL 1s
ALL
1s
F1
F2
F3
Test:
Rlpbk Lpbk Ptrns
F1
F2
F3
Loopback:
Abort LLB PLB
Summary of Contents for 3160-A4
Page 14: ...Contents viii March 2001 3160 A2 GB24 10 ...
Page 18: ...About This Guide xii March 2001 3160 A2 GB24 10 ...
Page 26: ...1 Introduction 1 8 March 2001 3160 A2 GB24 10 ...
Page 38: ...2 Installation 2 12 March 2001 3160 A2 GB24 10 ...
Page 54: ...3 Using the Front Panel 3 16 March 2001 3160 A2 GB24 10 ...
Page 102: ...4 Configuration 4 48 March 2001 3160 A2 GB24 10 ...
Page 110: ...5 Security 5 8 March 2001 3160 A2 GB24 10 ...
Page 162: ...8 Testing 8 24 March 2001 3160 A2 GB24 10 ...
Page 164: ...A Front Panel Menu A 2 March 2001 3160 A2 GB24 10 ...
Page 222: ...D Configuration Worksheets D 14 March 2001 3160 A2 GB24 10 ...
Page 240: ...E Pin Assignments E 18 March 2001 3160 A2 GB24 10 ...
Page 272: ...F SNMP MIB Objects F 32 March 2001 3160 A2 GB24 10 ...
Page 280: ...G IP Network Addressing Scenarios G 8 March 2001 3160 A2 GB24 10 ...
Page 300: ...J Equipment List J 2 March 2001 3160 A2 GB24 10 ...