GAI-Tronics L3149B, Manual

Page: 58 / 92

Programming Model L3149B C200 Advanced Desk Set
52
PTT Sense
When configured for local control and with parallel units, the operator is not allowed to transmit during
the transmission of a parallel unit. This input allows the desk set to sense parallel transmissions and
lock-out transmissions until the parallel transmission is over. When this input is asserted, pulled to
ground, the
TRANSMIT
LED flashes. When the input is disasserted, the
TRANSMIT
LED extinguishes.
N
OTE
: This option is available only if the
Type of Interface
is
Local
.
LTR CTS
When configured for local control (L3147A) and using a CDM1550 LS Mobile Radio, the unit requires
an input to indicate that a channel has been established. The CDM1550 LS Mobile Radio provides an
output for this. When
TRANSMIT
is pressed, the unit waits for Y ms, (where Y is 1000 to 5000 ms in
50 ms increments) for this input to be asserted. Upon assertion, the unit qualifies the assertion for X ms
(where X is 0 to 1000 ms in 10 ms increments).
Once qualified, the transmission begins and the TRANSMIT LED lights. If no assertion is received in the
programmed amount of time, “SYS NOT AVAIL” is displayed and the transmission is not made.
N
OTE
: This option is available only if the
Type of Interface
is
Local
.
Relay Outputs
A relay output can not be assigned if a programmable button set as Supv. via Relay is linked to it.
Disabled
When Disabled is selected, the output has no function.
E&M M-Lead
When the
Type of Interface
is configured as an
E&M
control or as an
E&M with Tone
control, a
closure is needed to act as the M-lead for transmission. The M-Lead is closed for any non-intercom
transmission.
N
OTE
: This option is available only if Type of Interface is E&M or Tone with E&M .
MDC Emergency
When a MDC emergency is decoded by the unit and the units is configured has Emergency Enabled
and also has
Emergency Alarm Enabled
, this output is asserted. The output is disasserted when the
emergency is cleared.