GAI-Tronics L3149B C200 Advanced Deskset - Manual (Page 26)

Operation L3149B (C200) Advanced Tone Remote Desk Set
20
Sending the MDC1200 Message
When the desired unit ID or alias appears on the display, press
MONITOR
to ensure that the radio channel
is not in use. When the channel is free, press the
TRANSMIT
button or handset PTT bar. The MDC1200
message is sent according to the table below once a channel is established.
If a channel cannot be established when using a CDM1550 LS Mobile Radio, “SYS NOT AVAIL” is
displayed and the MDC message is not sent. Additional attempts can be made by pressing the
TRANSMIT
button again.
Type of Call Group Calls and
Wildcards Allowed Acknowledgment
Required
Retries
Call Alert Yes Yes, if not Group or Wildcard 4, if ACK required
Select Call Yes No 0
Radio Check No Yes 4
Radio Enable No Yes 4
Radio Disable No Yes 4
Group Calls and Wildcards
If the ID being transmitted is a group call, E001 (*001) through EEEE (****), or contains wildcard digits,
F or #, no acknowledgment is required. For these types of calls, the unit transmits the message once and
exits the MDC menu.
As indicated in the table above, some types of MDC1200 messages do not allow group IDs or allow
wildcards. If the operator attempts to enter an ID that is not allowed, the unit may either beep indicating
an invalid entry or show “*ERR” in the ID field upon pressing
TRANSMIT
.
Acknowledgments
If the type of call requires an acknowledgment, the unit sends the first attempt and waits for an
acknowledgment from the target unit. If an acknowledgment is not received during the wait time, the desk
set attempts up to four retries displaying “RTX” in the upper right hand corner of the display and waits
each time for an acknowledgment.
If an acknowledgment is received, the display shows “***ACK***” on the second line of the display and
exits the MDC menu. Pressing the
CLEAR
button or entering a mode that requires the use of the second
line will clear the acknowledgment message.
If no acknowledgment is received during the retries or the user exits the MDC menu manually, the display
shows “***NO ACK***” on the second line of the display and exits the MDC menu. Pressing the
CLEAR
button or entering a mode that requires the use of the second line clears the acknowledgment
message.