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Chapter 5. Configuration Menu
61202156L2-1 TDU 120e User Manual 5-23
The C
ONFIG
menus for options ports are described in sep-
arate sections of the manual supplied with the option
card.
Nx/DBU (0.1) Menu Items
The Nx/DBU port has two main menus:
N
X
56/64
CONFIG
-- Nx operation and DBU
CONFIG
-- DBU
operation.
Nx56/64 Config
Under N
X
56/64
CONFIG
, the menu items are:
DS0 RATE
This sets the base DS0 rate of the interface. The actual
data rate depends on the number of DS0s assigned to
the Nx port.
Choices: 56K
OR
64K
TX CLK CNTRL
Controls the clock used by the TDU 120e to accept
transmit (TX) data from the DTE. The default is
N
ORMAL
. If the interface cable is long, causing a
phase shift in the data, the clock can be selected as
I
NVERT
. This switches the phase of the clock which
should compensate for a long cable.
Choices: N
ORMAL
, I
NVERT
DATA
Used to control the inverting of the DTE data. This
inversion can be useful when operating with an
HDLC protocol. Often used as a means to ensure 1s
density.
Choices: N
ORMAL
or I
NVERT
If I
NVERT
is selected, zero (0) inhibit should also be selected to prevent an
open DTE input from placing zeros on the network.