Specifications

October 2012 © British Telecommunications plc 2011
Page 13
Left dot IP
Right dot GPRS
Left dot PSTN
Off
IP path to platform is
not established
GPRS path to platform
is not established
PSTN path has yet to
establish, or last
attempted PSTN call
was unsuccessful
Flashing
1s on
1s off
An IP address has
been obtained from
the tunnel server.
An IP address has
been obtained from
the GPRS Radius
server.
PSTN is in the process
of dialling the platform
Rapid flashing
250ms on
250ms 0ff
N/A
N/A
PSTN call in progress
and data is exchanging
with the platform.
On
IP path now
established to the
platform.
GPRS path now
established to the
platform.
Last PSTN call attempt
successfully
communicated with the
platform
Blinking flash
125 ms on
875 ms off
N/A
N/A
PSTN voltage has
failed. (<3.5V).
Data blink
25ms off
Polling or alarm data is
passing across the IP
path
Polling or alarm data is
passing across the
GPRS path
N/A
Figure 10 - LED path status indicator dots
Of the 16 alarm pin inputs, all behave as general purposes inputs with the following
exceptions.
Pin 4 has the RPS output associated with it. (see output 3 RPS)
Pin 11 acts as an ATS input as per the requirements of the BSIA form 175 document. This
applies only when output 1 is set to BSIA mode (F8 =1).
Pin 13 acts as an AC fail input and therefore has a default 7 minute delay before a pin 13
alarm is transmitted. It also has a 7 minute delay before a reset is sent. On presenting an
alarm condition to pin 13, the units display will show the alarm immediately (AL 13) but 7
minutes of constant alarm condition needs to elapse before transmission. Similarly, a pin 13