Chapter 6. Diagnostics
6-8
MX2800 STS-1 User Manual
61200659L1-1
STS-1 LOOPBACKS
After you select
STS-1 L
OOPBACK
, the menu in Figure 6-10
appears. The sections following the figure provide descriptions and
illustrations of the testing options. Select
1=D
ATA
M
ODE
to end a
test in progress.
Figure 6-10. STS-1 Diagnostics Menu
Line Network
L
INE
N
ETWORK
performs a loop of the STS-1 back to the network.
This loopback occurs just prior to the HDB3/B8ZS decoder of the
LIU; therefore, any coding violations received by the STS-1 will be
inserted back into the network without modification. See Figure
6-11 on page 6-9 for an illustration of this text.
If a
L
INE
N
ETWORK
loopback is active when the MX2800 STS-1 is
operating in the
F
REE
-R
UN
timing mode, the timing source for the
STS-1 is effectively removed from the circuit. Therefore, it is up to
the test equipment or network to provide STS-1 timing into the
circuit for the duration of the test.
Summary of Contents for 1200287L1
Page 10: ...x MX2800 STS 1 User Manual 61200659L1 1...
Page 18: ...Table of Contents xviii MX2800 STS 1 User Manual 61200659L1 1...
Page 22: ...List of Tables xxii MX2800 STS 1 User Manual 61200659L1 1...
Page 90: ...Chapter 3 Configuration 3 44 MX2800 STS 1 User Manual 61200659L1 1...
Page 134: ...Chapter 6 Diagnostics 6 12 MX2800 STS 1 User Manual 61200659L1 1...
Page 140: ...Chapter 7 Circuit and Network Redundancy 7 6 MX2800 STS 1 User Manual 61200659L1 1...
Page 146: ...Chapter 8 Power Loss Recovery 8 6 MX2800 STS 1 User Manual 61200659L1 1...
Page 160: ...Chapter 9 Transaction Language 1 TL1 9 14 MX2800 STS 1 User Manual 61200659L1 1...
Page 164: ...Appendix A Pinouts A 4 MX2800 STS 1 User Manual 61200659L1 1...
Page 168: ...Appendix B Specifications Summary B 4 MX2800 STS 1 User Manual 61200659L1 1...
Page 174: ...Appendix C Acronyms Abbreviations C 6 MX2800 STS 1 User Manual 61200659L1 1...