System Configuration
700-814-112-01, Revision 01
16
November 24, 1999
UTU-814 List 1B
Table 5.
Settings in Config LTU and Config NTU Interface Menus (Cont.)
Field
Description (
settings in boldface type are default settings)
AIS Mode
Specify the mode used to assert an Alarm Indication Signal (AIS).
Used in Structured mode.
FULL
The full AIS mode asserts the AIS when one loop is down.
HALF
The half AIS mode asserts the AIS when both loops are down.
Line Equalization
Select the line equalization according to the distance from the
DSX-1 cross connect to the UTU-814.
0
Sets the line equalization for 0 to 133 feet.
133
Sets the line equalization for 133 to 266 feet.
266
Sets the line equalization for 266 to 399 feet.
399
Sets the line equalization for 399 to 533 feet.
533
Sets the line equalization for 533 to 655 feet.
P68
Sets the line equalization for use with a Channel Service Unit (CSU)
on customer premises.
Insert Framing
Enable or disable framing insertion. Use where data requires
insertion of D4-SF or ESF framing for transmission over T1
network.
DIS
Disables framing insertion.
ENA
Enables framing insertion.
Line Code
Select Bipolar Eight-Zero Suppression (B8ZS) or Alternate Mark
Inversion (AMI) line coding.
B8ZS
Outgoing streams of eight consecutive zeros are replaced with
B8ZS code words. Received B8ZS words are placed with all zeros.
AMI
Binary ones (marks) are transmitted as alternating positive and
negative pulses and zeros have an absence of pulses.
Nx64k 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.
INT
Internal Oscillator
Nx64k
Nx64k Serial Data port receive clock (TT)
HDSL
Timing recovered from the HDSL input.
EXT
External 1.544 MHz clock
