Specifications

October 2012 © British Telecommunications plc 2011
Page 12
The dot on the left display indicates the status of the wireline path, and the dot on the right is
the status of the wireless path.
The dot will be off when the communication path is unavailable. It will flash when the unit has
obtained a suitable IP address during establishment, and will be steady on when the path has
been fully commissioned.
The dots will also briefly blink off when data is being passed over that link. i.e. each time the
unit is polled then a brief blink is seen on the associated path dot. Also alarm transmission will
be seen as a brief blink on the associated path dot.
When fully commissioned over both paths, then both dots should be on.
The meanings of the dots are somewhat similar to the path status Leds on previous secure
units, and they also share some commonality with the dots on a Redcare 5G STU. The
mnemonic “Left Landline” helps as a reminder as per 5G STU.
Additionally, when representing the PSTN path, the left dot will blink to indicate “low PSTN
voltage” and rapid flash to indicate PSTN communication to the platform is in progress.