July 2013 © British Telecommunications plc 2013
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Comms Fail output mode (F8)
Output 1 on the unit is a comms fail output. This is a transistor driven output that switches low.
The unit has an integral 10K pull up resistor to pull the output high. See Outputs section for
further information.
The output can be configured for different modes of operation through the F8 button menu.
Settings.
F8 = 1 BSIA Form 175 mode
F8 = 2 Standard comms fault 1 (either path failed)
F8 =3 Standard comms fault 2 (both paths failed)
F8 = 4 Output 1 = Primary path failed, Output 2 = Secondary path failed.
Example. Changing the unit to use output 1 to indicate “Both Paths Failed” (F8=3).
Access the button config menu by holding M for 3 seconds.
Repeatedly Press M until F8 is displayed.
Press Set – the display now shows the current setting. (as per list above)
Press S to toggle the value to the required setting. i.e. =3 for both paths failed.
Press M to return to the F8 main menu.
Repeatedly press M to scroll to the ?? (save changes question marks)
Press S and the ?? will flash to prompt “Are you sure?”
Press S and the unit will briefly display Pr (program) as the changes are written to
flash. The unit will then restart.
At any time the configuration mode can be exited, without saving changes, by holding down M
for 5 seconds.
Load Defaults (Ld)
The Ld option on the menu can be used to set the unit back to factory default. That is all
settings will be reset to their standard values. The unit will revert to a standard configured
GPRS/PSTN unit or IP/GPRS unit as supplied.
Example. Setting the unit back to factory default.
Access the button config menu by holding M for 3 seconds.
Repeatedly Press M until Ld is displayed.
Press S and the Ld will flash to prompt “Are you sure?”
Press S and the unit will briefly display Pr (program) as the changes are written to
flash. The unit will then restart.
At any time the configuration mode can be exited, without saving changes, by holding down M
for 5 seconds.