Chapter 3. Operation
74
TSU 120 User Manual
61200.129L1-1
DCD
Data Carrier Detect. Indicates to the DTE when a
valid signal is being received at the Network Interface.
Choices: Normal (see Table 3-A) or Force On
DSR
Data Set Ready. This signal indicates to the DTE when
the DCE is turned on and ready for operations.
Choices: Normal (see Table 3-A) or Force On
0 INHIB
The Nx interface will detect an uninterrupted string of
zeros (0s) being transmitted toward the network, and
if 0s are transmitted for >1 second, the TSU 120 will
force 1s.
Choices: On or Off
INBAND
The Nx56/64 port is capable of providing an inband
communications channel (for T-Watch and SNMP)
between units. This is accomplished by using 8 kbps
of the first DS0 assigned to that particular Nx56/64
port. If in 56 K mode, no data bandwidth will be used.
Inband must also be enabled at the destination port.
Choices: On or Off
Table 3-A
Normal Mode of Operation
RTS
V.54
Loopback
511 TST
ON
Self Test
Active
Netwk Test
Active
No DS0
Mapped
Network
Alarm
CTS
Follows
OFF
OFF
OFF
OFF
OFF
DCD
––
––
OFF
––
OFF
OFF
DSR
––
OFF
OFF
OFF
OFF
––
Where "––" = don't care
Force On = On under all conditions
This table indicates conditions which cause the Port Control Signals to be deactivated.
Summary of Contents for TSU 120
Page 1: ...TSU 120 PART NUMBER 1200129L1 USER MANUAL 61200 129L1 1A July 1997...
Page 52: ...Chapter 2 Installation 38 TSU 120 User Manual 61200 129L1 1...
Page 132: ...Appendix C System Configuration Charts 118 TSU 120 User Manual 61200 129L1 1...
Page 138: ...Appendix D TSU 120 System Messages 124 TSU 120 User Manual 61200 129L1 1...