
23
ERROR light flashing Long/Fast
a This indicates a weak GSM signal.
b If the unit has responded to the 1234stat0 SMS command, then compare
the results of the reported signal (please see section ‘To switch on and Test’
on page 16) with the table below.
c If the unit is not responding to the 1234stat0 SMS command connect
a laptop or similar computer to the internal USB port. Please see the
preconditions for using the USB port in Appendix A.
Signal level – when reviewing the Status response
d The following is a guide to the received signal level along with suggestion
action to take.
Signal
Comment
Action Required
-104 to
-100dBm
Very weak signal,
connection not
reliable
Essential to re-site the unit and/or
install an external antenna
-99 to
-90dBm
Poor signal, connec-
tion should be reliable
but speech may be
subject to interruption
due to signal fading
effects
Performance improvement should
be realised by re-sitting the unit and/
or installing an external antenna
-89 to
-70dBm
Good signal condition None specifically, re-sitting unit
and/or antenna may give further
improvement
-60 to
-50dBm
Very good signal
condition
None