Avaya X330WAN manual Local Line Loopback

Chapter 5 Troubleshooting

Figure 5.2 Local Line Loopback

X330WAN

	Tx	Line
CPU
		Framer
	Rx

WAN

•Local Payload Loopback (E1/T1) - The X330W-2DS1 Line Framer creates a loop through itself and re-frames the signal on its way back from the peer module. The Local Payload Loopback is illustrated in Figure 5.3.

Figure 5.3 Local Payload Loopback

X330WAN

CPU

Tx

Rx

Line Framer

WAN

•Remote Line Loopback (T1 only) - X330W-2DS1 sends the remote peer module a request to create a line loop. A Line Loopback signal is used to indicate the request. The Remote Line Loopback is illustrated in Figure 5.4.

Figure 5.4 Remote Line Loopback

X330WAN

CPU

Tx

Rx

Line

Framer

LLB

Line

Framer

Remote

Peer

•Remote Payload Loopback (T1 only) - X330W-2DS1 sends the remote peer module a request to create a loop through its Line Framer. A Payload Loopback signal is used to indicate the request. The Remote Payload Loopback type is only available in ESF framing. The Remote Payload Loopback is illustrated in Figure 5.5.

Figure 5.5 Remote Payload Loopback

X330WAN

CPU

Tx

Rx

Line

Framer

PLB

Line Framer

Remote

Peer

Use the loopback diag, loopback local, or loopback remote command to instruct X330W-2DS1 to perform a loopback. For more information about these commands, see Chapter 6: X330WAN CLI Commands.

84 Avaya X330WAN User’s Guide