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System Configuration
LTU
NTU I
AND
The following table lists the settings available in the Config LTU and Config
NTU Interface menus. The settings in boldface type are factory default
settings.
Settings in Config LTU and Config NTU Interface Menus
Settings
Primary Timing
(a)
Source
Nx64k Port
Interface Type
Data Rate/# of
TSs
Beginning TS
Transmit Clock Selects the transmit data (SD) clock as External (EXT), Internal Rising
CTS
DSR
RLSD
LL/RL
(a) Primary Timing Source automatically set to Nx64k in Nx64K AUTO mode.
16
NTERFACE
Description
Selects the clock source for the HDSL transmit direction. Choices are:
• INT - Internal Oscillator
• EXT - External 2.048 MHz clock (UTU-702C only)
• Nx64k - Nx64k Serial Data port receive clock (TT)
• HDSL - Recovered clock from received HDSL data
Select the interface standard for serial data port. Choices are: V.35,
V.36, X.21, and RS-530.
Read-only display of HDSL data rate and corresponding number of
time slots (TSs) as set automatically by TT clock (Nx64K AUTO mode)
or by HDSL Payload Rate option in Config System Settings menu
(MANUAL mode). Default setting is 256kbps/4.
Read-only display of beginning time slot. For these units Beginning TS
is always 0 (zero).
Edge (INT_RISING), or Internal Falling Edge (INT_FALLING). Transmit
clock is always EXT if the Timing Source is Nx64k.
Specifies one of three methods the LTU/NTU uses to generate the
Clear to Send (CTS), Data Set Ready (DSR), and Received Line Signal
Detect (RLSD) control signals for the V.35/V36 port. The V.35/V.36
port is hardware-configured as DCE. Set each of these parameters to
match the requirements of the application. Choices are:
• STD (standard) - The output control signal follows the ITU
standards
• ON (force ON) - Control signal is always ON
• OFF (force OFF) - Control signal is always OFF
Selects whether the LTU/NTU responds to (enabled) or ignores
(disabled) the Local Loopback (LL) and Remote Loopback (RL) input
control signals. The enabled (ENA) status appears on the display.
June 14, 2002
700-702-900-04, Revision 04
S
ETTINGS
UTU-702C and ETU-752C List 1
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