Loop Line and Loop Trunk
Only the followings LICs have the capability to redirect received signals onto
transmit signals (loops):
LIC 513/523/514/515/516/517/544/545/546/551/552/553/554/555/556.
Local Node
Local Node
Switch
Adapter
LIC
Switch
Adapter
LIC
Remote Node
LIC
Adapter
Switch
Loop (for Trunk Loopback)
Remote Node
LIC
Adapter
Switch
Loop (for Line Loopback)
LS
LS
Figure
4-11. Loop Trunk and Loop Line on Remote 2220
Attention:
On the 2220 remote node, the remote line attachment must be set in wrap mode by
starting Loop Line (for line loopback) or Loop Trunk (for 2220 trunk loopback)
before starting test from the local NAS.
Chapter 4. 2220 Diagnostics
4-7
Summary of Contents for 2220 Nways 300
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Page 12: ...x 2220 Models 300 500 and 501 Service Guide...
Page 35: ...General and Product Safety xxxiii...
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Page 37: ...General and Product Safety xxxv...
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Page 39: ...General and Product Safety xxxvii...
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Page 41: ...General and Product Safety xxxix...
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Page 58: ...2 4 2220 Models 300 500 and 501 Service Guide...
Page 77: ...Chapter 3 Nways Switch Administration Station Functions 3 19...
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Page 111: ...Chapter 5 2220 Problem Determination Copyright IBM Corp 1998 1999 5 1...
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Page 205: ...Appendix A Schematics A 11...
Page 206: ...A 12 2220 Models 300 500 and 501 Service Guide...
Page 217: ...Catalog Section Appendix D Parts Catalog D 7...
Page 226: ...Assembly 5 2220 Modules 1 2 D 16 2220 Models 300 500 and 501 Service Guide...
Page 244: ...D 34 2220 Models 300 500 and 501 Service Guide...
Page 246: ...E 2 2220 Models 300 500 and 501 Service Guide...
Page 248: ...X 2 2220 Models 300 500 and 501 Service Guide...
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Page 264: ...IBM Part Number 02L4247 Printed in Denmark by IBM Danmark A S 2L4247 SY33 2121 1...