User Manual

AS4000 Release3 and Release 4 Central
Terminal Installation and Commissioning
DLP-015
605-0000-432
Issue 1.3a Date 18th October 1999
Page 6 of 8
d) It is not possible to maintain off hook conditions due to the system timing the
phones out so the off hook condition must be simulated
Using the Sitespan as follows:
• Connect Sitespan to the modem shelf and configure the database.
• Select the Analogue card view, reduce in size and move to the corner of the
screen so that the receiver gain adjustment may be manipulated
• Open Subscriber View from the View option.
• Ensure that the subscriber database is created for the installed Modems.
• Use the cursor to highlight the subscriber line for simulated off hook.
• Once the subscriber line is highlighted, use the cursor to select Test View
under the View option.
• With the Test View opened, point and click the Reserved Line button. If the
line is in idle state the test menu will be displayed.
• From the test menu, point and click ST Loopback button.
• Select the loopback direction as Towards Network and check TU through
path on timeslot 1 and 2.
• Once the above is configured point and click OK button. This will set the
radio traffic mode: high rate and high power.
• Once the test menu is available again leave the menu open, do not close or
free line if the traffic mode is to be maintained.
g) Adjust the gain control voltage on Sitespan to achieve a RF Power level of
nominally +8dBm on the RF Power meter. The exact reading should be 11dbm the
measured loss from point C to point B (approximately 3dB) as shown in Figure 37
Record the voltage and power level on the Test Result Sheet.
h) Remove the loopback by selecting Loopback Off and OK to deactivate the
loopback. Close test menu and return to the Subscriber View.
i) Putting the rack back in service
• Switch the Test CRU and CT Rack OFF.
• Remove the Test CRU and all interconnecting cables and accessories from
the RF Output connectors on the CT.
• Re-connect the Antenna /Feeder tails to the CT.
• Connect the Sitespan cables to the 25 way Sitespan port on the modem
backplane
• Re- connect the 2Mbit/s ports to the 2Mbit/s IN connectors on the shelf
interface connections located at the right hand side of each Modem Shelf.
• Switch the CT Rack ON and wait for the system to complete the power-up
self test sequence successfully.
7. Re-Connecting The 2Mbit/s Ports On The Modem Shelf.
Place a loop cable between the 2Mbit/s IN and 2Mbit/s OUT to condition the TU Card
alarm system. Leave loop for about 10 seconds before removing the loop cable.