User guide

45 Mbps Backhaul User Guide
Issue 3, December 2004 Page 31 of 113
System Clock If the SNTP (Simple Network Time Protocol) (see section 6.3.8.3) is enabled a system clock
attribute is displayed giving the date and time of the last page refresh. If SNTP is disabled then the system clock
attribute is not displayed on the home page.
6.1.1 Home Page Alarm Display
The home page is also used to display all outstanding major system alarms. Whenever system alarms are
asserted a yellow warning triangle is displayed on webpage navigation bar. The warning triangle will be visible
from all webpages. Clicking the warning triangle will cause the webpage to jump back to the system homepage.
Figure 10 shows an example alarm screen.
Figure 10: Alarm Warning Triangle
The following major system alarms are defined:
Install Arm State The Install Arm State alarm is displayed. This alarm warns when a wireless unit is in
installation mode. After installation the wireless unit should be disarmed. This will increase the wireless links
data carrying capacity and stop the installation tone generator. The wireless link is disarmed from the
‘Installation Wizard.’ See section 6.3.3.
Install Status If any errors are detected during the installation process, the unit will automatically raise an
audible alarm. The install status alarm will be raised with an appropriate reason code, e.g. the alarm will be
raised if an incorrect target MAC address is specified for the peer 45 Mbps Backhaul wireless unit.
ARQ Is Not Configured ARQ must be enabled on both ends of the Point-to-Point link. This error message is
generated if there is a mismatch in the ARQ settings between both ends of the link.
Encryption Is Not Configured On Both Units Encryption must be enabled on both ends of the Point-to-Point
link before the over the air packets can be successfully decrypted. This error message is generated if encryption
is not configured on both units.
Ethernet Link Status If there are any problems with the Ethernet interface this alarm will be asserted. This
alarm will most likely seen if the unit has not got an Ethernet cable plugged into its Ethernet socket.
Master And Slave Have Incompatible Region Codes The 45 Mbps Backhaul uses region codes to comply with
local regulatory requirements governing the transmission of wireless signals in the 5.8 GHz band. Region codes
can only be changed by obtaining a new 45 Mbps Backhaul license key. If this alarm is encountered the