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Chapter 4. Status
61202217L1-1B
T3SU 300 User Manual
75
Lead descriptions for both the HSSI and the V.35 interfaces are as
follows:
HSSI Interface Leads
Condition
TA (terminal available)
Asserted by the DTE to indicate readiness to
transmit data.
CA (communications
equipment available)
Asserted by the T3SU 300 to indicate readiness
to transmit data.
LA (loopback circuit A)
The condition reflected by this lead is
dependent upon the LB lead. See Table 4-1.
LB (loopback circuit B)
The condition reflected by this lead is
dependent upon the LA lead. See Table 4-1.
LC (loopback circuit C)
Asserted by the unit to request a loopback from
the DTE.
TM (test mode)
Asserted by the T3SU 300 when either the
network or the port is being tested.
Table 4-1. LA and LB Leads
LA
LB
Condition
Off
Off
No test (normal)
On Off
Local
line
loopback
Off
On
Remote line loopback
On
On
Local DTE loopback
Both TA and CA must be on before data will flow.
Summary of Contents for T3SU 300
Page 20: ...20 T3SU 300 User Manual 61202217L1 1B ...
Page 24: ...24 T3SU 300 User Manual 61202217L1 1B ...
Page 30: ...Chapter 1 Introduction 30 T3SU 300 User Manual 61202217L1 1B ...
Page 42: ...Chapter 2 Installation and Operation 42 T3SU 300 User Manual 61202217L1 1B ...
Page 78: ...Chapter 4 Status 78 T3SU 300 User Manual 61202217L1 1B ...
Page 92: ...Chapter 5 Statistics 92 T3SU 300 User Manual 61202217L1 1B ...
Page 126: ...Appendix C Acronyms Abbreviations 126 T3SU 300 User Manual 61202217L1 1B ...
Page 138: ...Appendix D Glossary 138 T3SU 300 User Manual 61202217L1 1B ...