User manual

Chapter 5. Configuration Menu
61202156L1-1 TDU 120e User Manual 5-17
“O” INHIB
The Nx interface will detect an uninterrupted string of zeros
(0s) being transmitted toward the network. If 0s are transmit-
ted for >1 second, the TDU 120e will force 1s.
Choices: On or Off
INBAND MODE
The Nx56/64 port is capable of providing an inband commu-
nications 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, On Demand
TX CLK SOURCE
Controls the source of the clock used by the TDU 120e to
accept transmit data from the DTE.
Default: Internal.
If the application requires that the DTE device provide the
clock with the transmit data, the E
XTERNAL
setting is used.
Choices: Internal, External
This table indicates conditions which cause the Port Control
Signals to be deactivated.
Table 5-1. 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