Chapter 3 Operation
3-2
For each sub-menu, the default line parameters are shown. The actual settings are shown for each
parameter, which can be changed by arrow keys.
To change the settings, use
ENTER
key to select the parameter, use arrow key to select the new setting,
and then press
ENTER
again. If
ESC
is pressed before
ENTER
, the setting will not be changed.
3.8 Map
Setup
The next item under MAIN is TSIMAP, which determines the time slot interchange assignments (TSI). To
review or change MAP settings, use arrow keys to highlight MAP. Then press
ENTER
. The current active
map is indicated.
To review or change MAP settings, use arrow keys to move cursor to MAP. Then press
ENTER
. The current
active map is indicated. Using the LCD display, the MAP settings can only be reviewed. Changing the MAP
settings require either a terminal or a connection through the Ethernet to a management system.
Note that if a slot is equipped with a data card or voice card, "time slot" will not be relevant. Instead, the
number of time slots to be assigned to the data stream, which turn determines the total data rate, can be set.
Under the LINE menu, user can select either Nx56 or Nx64 data rate. Then, depending on how many time-
slots are assigned on a E1 or T1 line for that data, the final data rate will be determined.
3.9 Using
Terminal
To use the RS232 interface to configure the unit, connect a VT100 terminal to the DB9 jack on the front
panel using the supplied adapter cable and a null modem. The VT100 terminal can be a PC running a VT100
emulator software. The unit is configured as a DTE. Thus a null modem is needed for direct connection to a
VT100.
Upon connection, press
ENTER
and
ESC
alternately to bring the main menu into view.
Press O (Log On) to see the full menu.
Press S (System Setup) to review or change the configuration.
Unit Selection
The first CONTROLLER screen on the terminal has a line on Card Status. For each of the 9 interfaces, an I
means that a card is in place, an O means that the slot is vacant. If an alarm exist for the card, ALM is
displayed. Press U followed by the slot number to choose a card interface.
3.10 System Operation
3.10.1 Date
The main chassis is equipped with a RTC (Real Time Clock). User can change the current date and time as
necessary. The RTC is activated by the manufacturer before shipping. The RTC battery has a 10 years
power-off life cycle.
3.10.2 Master
Clock
Loop-V 4200 has a system clock PLL (Phase Lock Loop), which may be phase locked to any one of the 9
ports that has clock input, or internal clock.
The default clock configuration are as follows: (a) master clock, (d) current clock, (c) clock recover. When
the master clock source is lost, the system will automatically switch to second clock source.
This is used to provide an alternative clock source when the primary clock source is lost, the current active
clock source is shown by the LCD "MCLK" command and terminal "S" command.
NOTE
: if the second clock source is lost as well, Loop-V 4200 will automatically switch to the internal clock
source.
If clock recover mode is manual, Loop-V 4200 will not return to the master clock source when the master
clock source returns. In order to switch back to the master clock source, the clock must be reselected as the
master clock source via the front panel "MCLK" command or the terminal "S" command.