66250756-EN - V2.1 - 05/11/19
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4000 Series GSM Lite Audio Intercom - Technical Manual
4000 Series GSM Lite Audio Intercom
UNLATCH PREVENTION FEATURE (LLA)
The unlatch prevention command
LLA
, when enabled, will prevent a programmed latched output (the GSM’s relay or the auxiliary
output) from being inadvertently unlatched by a DTO number or by pressing the relevant button (
3
) on the phone during a call.
Even when this feature is enabled if either the GSM’s relay or the auxiliary output have been setup to latch they can still be unlatched
using the relevant
1111RUL
or
1111A1U
programming command.
By default this feature is disabled (set to 00), but can be enabled (set to 01). The following programming commands can be used to
enable/disable and check the unlatch prevention feature.
1111LLAnn
Set the unlatch prevention feature to nn, where nn = 00 (disabled) or 01 (enabled).
1111LLAnn?
Set the unlatch prevention feature to nn, where nn = 00 (disabled) or 01 (enabled). Also
send a confirmation text back to the sender.
1111LLA?
Query the status of the unlatch prevention feature stored in the GSM module.
Programming the GSM Intercom