700-814-112-01, Revision 01
System Configuration
UTU-814 List 1B
November 24, 1999
15
LTU
AND
NTU I
NTERFACE
S
ETTINGS
The settings available in the Config LTU and Config NTU Interface menus are
listed in
Table 5.
Settings in Config LTU and Config NTU Interface Menus
Field
Description (
settings in boldface type are default settings)
DSX-1 Port
Primary Timing
Source:
Select the clock source for the HDSL transmit direction.
If any
time slots are assigned to DSX-1, then the only options are
DSX-1 or EXT for both the DSX-1 and Nx64k ports.
EXT
External
1.544
MHz clock.
DSX-1
Timing recovered from the T1 input.
Framing Mode
Select the framing mode used by your equipment.
D4-SF
Provides 12 frames of 24 time slots per superframe.
ESF
Provides 24 frames of 24 time slots per superframe.
N/A
Unit is in unstructured (UNSTRUCT) application mode.
Idle Code
Select a transmit idle code for insertion into unused time slots.
00 to
FF
Idle code (from 00 to FF) is transmitted in unused time slots from
DSX-1 port.
Factory default setting is FF.
Data Rate/# of TSs
Specify the DSX-1 transmit data rate as the number of kbps or the
number of Nx64k time slots.
64 to
1536
(kbps)
Enter the data rate from 64 to 1536 kbps (for example, 64, 256,
768). Factory default setting is 1536 kbps (24 time slots).
0 to
24
(time
slots) Enter the number of Nx64k time slots up to 24 (for example, 1, 12,
24). Factory default setting is 24 (1536 kbps).
Beginning TS
Enter the number of the beginning time slot for the transmitted
T1 data. Options are time slots 1 to 24 in STRUCT application mode
and time slot 1 in UNSTRUCT mode. The factory default setting is
time slot
1
.
The number of time slots selected for the DSX-1 port
determines the number of time slots remaining for the
Nx64k port, and may determine the beginning time slot
for the Nx64k port.
