350-819-300-01, Revision 01
System Configuration
ELU-819 List 1
January 10, 2000
21
S
YSTEM
S
ETTINGS
The settings available in the Config System Settings menu are listed in
. The settings in boldface type are factory default settings.
Table 4.
Settings in Config System Settings Menu
System Setting
Description
Application mode
Select one of the following application modes:
UNSTRUCT
System operates in the unstructured (unframed) application mode
using 32 time slots. Use when LTU and NTU use either the G.703 or
Nx64K port with no framing. Two-port (G.703 and Nx64K) operation
is not possible.
STRUCT
System operates in the structured (framed) application mode using
1 to 31 time slots. Use to transport framed voice channels between the
LTU G.703 port, and the NTU G.703 and/or Nx64K ports.
PTM
System operates in the point-to-multipoint mode. Two pairs of a
single LTU connect to two different NTUs.
TSP
System operates in time slot prioritization mode. Time slots 1 through
15 transport high priority traffic over Loop 1; time slots 16 through 31
transport low priority traffic over Loop 2. If a loop fails, time slots 1
through 15 are sent over the active loop. The NTU must be locally
powered. Remote Power Feed must be set to NONE.
SINGLE
System operates in single-pair mode using time slots 1 through 15 on
Loop 1. Use to transport framed voice channels between the LTU and
NTU G.703 ports or serial data between the Nx64K ports. The NTU
must be locally powered. Remote Power Feed must be set to NONE.
Remote Power
Feed Mode
Select one of the following power feed modes:
NONE
Disables the remote power feed mode. The NTU must be locally
powered. Use for TSP and SINGLE application modes.
POWER
Enables the LTU (ELU-819) to supply parallel power (full power) to the
NTU via the HDSL loops.
WETTING
Enables the LTU (ELU-819) to supply a low level DC current when not
supplying full power. Wetting is used to prevent corrosion of HDSL
lines and connections. The NTU must be locally powered when
selecting this option.
