Section 150-441-124
June 12, 1997
Revision 01
Page 14
PairGain Engineering - Plant Series
HiGain HLU-D41
10.2
The dumb terminal is configured as DCE. To connect the HLU-D41 to a dumb terminal, connect the
RS-232 COM port of the dumb terminal to the HLU-D41 front panel RS-232 connector using a serial
cable (Figure 7):
Figure 7. Connecting the HLU-D41 to a Dumb Terminal
11. Initialization
11.1
Power-up Sequence.
When an HLU-D41 is first inserted into a channel bank, its bandwidth and
slot settings may exceed the intended setting for the new application. This could disrupt service in
an existing channel bank for the active channel timeslots if the HLU-D41 slot configuration conflicts
with another channel card’s DS0 data. A special power-up sequence is built into the HLU-D41 to
preclude this interference with another channel card’s DS0 data during the power-up initialization
mode.
11.2
Time Slot Assignments for Remote Units and Line Units.
When installing the fractional T1
circuit, remember that the data at the remote unit (customer) side always begins at time slot 1 and
continues through the number of time slots provisioned. Data at the line unit begins at the time slot
assigned to the line unit’s physical slot position. For example, if the line unit is installed in the D4
channel bank in position 13 and the circuit is provisioned for four contiguous time slots of
bandwidth, then the data will be in time slots 13, 14, 15, and 16 at the line unit, but in time slots 1, 2,
3, and 4 at the remote unit.
