HP 3162 manual Starting a Payload Loopback, Starting a DTE Loopback

Monitoring and Testing

Starting a Payload Loopback

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.

DSU

DTE ALL (DSX-1)1s

CSU

PLB INTERFACENETWORK

ALL 1s	ALL 1s
		496-14316-02
PORT 2	PORT 1

"Procedure

To perform a Payload loopback:

1.From the Main Menu screen, select Test.

2.From the Test screen, select Network & DTE Tests.

3.For the Payload Loopback command (under Local Loopbacks), select Start.

Starting a DTE Loopback

The DTE Loopback command (DLB) loops the received signal on the DTE

Drop/Insert (DSX-1) port back to the DTE without change.

DTE	DLB
(DSX-1)

DSU CSU

ALL 1s

NETWORK INTERFACE

PORT 2 PORT 1 496-14317-02

"Procedure

To perform a DTE loopback:

1.From the Main Menu screen, select Test.

2.From the Test screen, select DTE Tests.

3.For the DTE Loopback command (under Local Loopbacks), select Start.

5-22 August 2000 3162-A2-GB20-40