Fields And Options In Displayed Config Ltu And Config Ntu Interface Menus - ADC ETU-751C List 1 User Manual

System Configuration
2 Do the following for each interface option to be changed.
in the Config LTU and Config NTU Interface menus.
• Use the or the
• Use the SPACEBAR
ENTER to select the option.
The settings in boldface type in Table 16 are factory default settings.
Table 19. Fields and Options in Displayed Config LTU and Config NTU Interface Menus
Field and Options
Primary Timing Source
EXT
G.703
CRC-4 Mode
DIS
ENA
PASSTHRU
Idle Code
Data Rate/# of TSs
Beginning TS
40
key to select the sub-menu item to be changed.
to toggle to the appropriate option or type in the correct information, then press
Description
Selects the clock source for the HDSL transmit direction.
External 2.048 MHz clock (UTU-701C only)
Input E1 clock
G.703 Port
Cyclic Redundancy Check (CRC) to detect errors in transmitted data. Available only when less
than 32 time slots are selected (places unit in structured application mode).
CRC-4 mode is disabled. CRC-4 mode is not available (N/A) when 32 time slots are selected
(places unit in unstructured application mode).
The input G.703 signal is monitored for CRC-4 multiframe errors. A new CRC-4 code is output
for use at the remote unit. Detected errors are displayed in the Monitor LTU and NTU Interface
screens.
All time slot 0 bits are passed unchanged to the remote unit. Useful when detection of CRC-4
errors is performed by customer equipment.
User inputs the idle pattern (from 00 to FF) transmitted in unused time slots from LTU or NTU
G.703 port. Factory default setting is FF.
Read-only display of indicated HDSL data rate and corresponding number of time slots (TSs)
as set with HDSL Payload Rate option in the Config System Settings menu (See
Framing and Rate Selectable HDSL" on page
Read-only display of beginning time slot. This setting is 0 (zero) in the structured mode and
one (1) in the unstructured mode.
August 9, 2002
Table 19 describes the fields and options displayed
17). Default setting is 256kbps/4.
700-701-100-02
"G.704
UTU-701 and ETU-751 List 1