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ADCP-61-471 • Issue 4 • June 2000 • Section 2: Operation and Maintenance
2-102
© 2000, ADC Telecommunications, Inc.
DLP-531
Page 4 of 7
Table 531-1. HLXC Configuration Fields, continued
FIELD TYPE OPTIONS DESCRIPTION DEFAULT
HLXR T1 Line Code Toggle AMI Alternate Mark Inversion AMI
B8ZS Bipolar Eight-Zero Substitution
AUTO Specifies that the T1 line code transmitted by the
HLXR will match the line code received by the
HLXR.
HLXR LBO Setting* Toggle UNIT SWITCH Defaults to the Line Buildout hardware
configuration settings on the HLXR.
Version C HLXC:
UNIT SWITCH
0.0 dB, 7.5 dB, 15.0
dB, or 22.5 dB
Sets the LBO in decibels for the HLXR. Version E and
Version D HLXC:
0.0 dB
Loop Power Setting* Toggle UNIT SWITCH Defaults to the Loop Power hardware
configuration settings on the Version C HLXC
only. Refer to DLP 516 for more information
about the Version C HLXC’s unit switch.
Version C HLXC:
UNIT SWITCH
Version E and
Version D HLXC:
ENABLED
ENABLED When loop powering is on and an HRX is not
connected to the HLXC, –130 VDC span power is
supplied over the HDSL loops by the HLXC.
When loop powering is on and an HRX is
connected to the HLXC, ±130 VDC power is
supplied over the HDSL loops. ENABLED must
be selected if an HRX is used.
DISABLED No loop power is supplied. A D1 HLXR is the
only HLXR with a local powering option. All
other HLXR modules must be loop powered.
Loop 2 Operation‡* Toggle UNIT SWITCH Defaults to the Loop 2 hardware configuration
settings on the Version C HLXC.
Version C HLXC:
UNIT SWITCH
ENABLED Channels 1 - 12 are transmitted on Loop 1 and
channels 13 - 24 are transmitted on Loop 2.
Version E and
Version D HLXC:
ENABLED
DISABLED Single-loop operation is enabled by blocking 12 of
the 24 DS0 channels (13 - 24) within the DS1
signal. Single-loop operation is used primarily
when only one loop is available to provide service.
*Note: HLXC and HLXR Switch Settings (HLXC DSX-1 EQ, HLXR LBO, Loop Power, Loop 2 Operation, and HLXR Simplex
Power) of the module being configured are displayed at the bottom of the screen.
‡Note: The Version D and later HLXC module can be provisioned to provide fractional T1 service by deactivating one of the
HDSL loops (Loop 2) or by selectively blocking specified channels. See the DS0 Channel and Blocked Channel Pattern fields.
(continued)