Section 150-619-100
Revision 01
Page 10
8. SETTING THE SYSTEM OPTIONS
8.01 The HLU-619 contains a non-volatile RAM,
which stores the System Options Settings. No dip-
switches or jumpers are required to set the HLU-619
configuration. The System Options are set using
buttons on the front panel or through the RS-232
interface or from the Network Management
interface. The settings are retained if shelf power is
lost or if the HLU-619 is unplugged. Table 2 lists the
HLU-619 System Options. Figure 9 illustrates the
same options on the HLU-619 System Settings
Menu. The settings shown in the second column
represent the factory default settings.
8.1 USING THE FRONT PANEL
8.01 Use the setup buttons located on the front
panel (Mode and SEL) to set the options.
1. Start the Options Settings mode by pressing
the Mode button, for at least one second, but
less than three seconds, and release. The
message displayed on the front panel alternates
between the system parameter and its current
setting.
2. Press the SEL button to scroll the display
through all settings of the displayed parameter.
After a setting has been selected, press the
Mode button. This updates the currently
displayed mode to the selected setting, then
selects the next parameter.
3. After the last parameter has been selected, the
display shows “CONF/NO.” Do one of the
following:
♦
Press the Mode button, at this time, none of
the changed parameters are installed.
♦
Press the SEL button, a “YES” message
appears, and the selected changes are
installed.
♦
The display returns to its normal mode. The
display also returns to its normal mode
without installing any new changes if, after 30
seconds, neither button is pressed.
8.02 All 14 user options can be set to the factory
default values by pressing the SEL button for six
seconds until the message “DFLT NO” appears.
1. To set the default values, press the SEL button
while the “DFLT NO” message is displayed.
“DFLT YES” appears, indicating the factory
default values are now in effect.
2. To exit the Default mode, without setting the
factory default values, press the Mode button or
do nothing for 30 seconds.
8.03 Pressing the Mode button for three or more
seconds scrolls through the HLU-619’s software
version number, its list number, the type of frame
pattern being received from the DSX-1, the line code
setting of the HLU-619, and all 14 options settings.
The line code parameter is the actual DS1 line code
being received by the HLU-619 when the DS1 code
pattern is set to Auto. Otherwise, the line code
parameter mimics either of the other two line code
settings, AMI or B8ZS, and is not determined by the
received line code.
8.04 The DS1 line code option should always be
set to conform to the type of T1 service (AMI or
B8ZS) being provided by the HiGain-2 system. The
Auto mode, which can adapt to either AMI or B8ZS,
should only be used in applications that require it
(such as when HiGain-2 acts as a standby circuit to
T1 circuits whose line codes are not known or may
be both AMI and B8ZS), because it has the following
limitations:
♦
The Auto mode sends one BPV in the T1 bit
stream whenever it switches from AMI to
B8ZS.
♦
The Auto mode allows each HiGain-2 end,
(HLU and HRU) to set its DS1 mode to the
code it is receiving at its local T1 input port.
This makes each unit’s code independent of
the T1 code, which is sent from the distant
T1 input port. If the line codes being
received by HiGain-2 are different in each of
the two T1 directions the HiGain-2 T1 output
codes will not match their respective T1 input
codes at the other end. This could cause the
customer’s received data to be AMI instead
of B8ZS, and violate the one’s density rules
by having excessive zeros.
