Orolia Spectracom VelaSync 1232, User Manual

Page: 224 / 268

Web UI Page loc-
ation
Current Status Indication Troubleshooting
MANAGEMENT/
NETWORK page Cannot login or access
the Web UI. The following
error message
is displayed:
“Forbidden
You don’t have
permission to
access/ on this
server” This message is displayed when any
value has been added to the Net-
work Access Rules table and your
PC is not listed in the table as an
Allow From IP address. To restore
access to the Web UI, either
1. Login from a PC that is listed as an
Allow From in this table; or
2. If it is unknown what PCs have
been listed in the Access table, per-
form an
unrestrict command
to remove all entries from the Net-
work Access Rules table. This will
allow all PCs to be able to access the
Web UI.
Table 5-2:
Troubleshooting using the Web UI Status indications
5.1.5 Troubleshooting GNSS Reception
If VelaSync reports GPS, Holdover, and/or Time Sync Alarms caused by insufficient GNSS
reception:
When a GNSS receiver is installed in VelaSync, a GNSS antenna can be connected to the
rear panel antenna connector via a coax cable to allow it to track several satellites in order
for GNSS to be an available input reference. Many factors can prevent the ability for the
GNSS receiver to be able to track the minimum number of satellites.
With the GNSS antenna installed outdoors, with a good view of the sky (the view of the sky
is not being blocked by obstructions), VelaSync will typically track between 5-10 satellites
(the maximum possible is 12 satellites). If the antenna’s view of the sky is hindered, or if
there is a problem with the GNSS antenna installation, the GNSS receiver may only be able
to a few satellites or may not be able to track any satellites at all.
When GNSS is a configured time or 1PPS input reference, if the GNSS receiver is unable
to continuously track at least four satellites (until the initial GNSS survey has been com-
pleted) or at least one satellite thereafter, the GNSS signal will not be considered valid. If
no other inputs are enabled and available, VelaSync may not initially be able to go into time
sync. Or, if GNSS reception is subsequently lost after initially achieving time sync, VelaSync
will go into the Holdover mode. If GNSS reception is not restored before the Holdover
period expires (and no other input references become available) VelaSync will go out of
sync. The GNSS reception issue needs to be troubleshot in order to regain time sync.
212 VelaSync 1232 User Manual
APPENDIX