Acim Outbound Command Handling - Motorola APX 7500 Detailed Service Manual

4-12
NOTE: Enabling and disabling Scan operation is not supported via the ACIM interface. Scan
operation enabled in the Consolette is not recommended when used with a remote console
using the ACIM interface. Scan operation in the radio can cause the radio to unmute to audio
on an unselected channel. There is no indication to the Console user of the radio's scanned-
to channel information. Any resulting dispatch communications including ACKs could
unintentionally get transmitted on an unselected channel.
NOTE: For instructions on configuring the Consolette for ACIM operation, see
manual.

4.12.3.1 ACIM Outbound Command Handling

After receiving an ACIM command, the Consolette acts on the command as appropriate. This
involves sending one or more software commands to the internally-housed mobile radio to cause it
to enact the necessary changes.
The following ACIM commands are interpreted by the Consolette:
4.12.3.1.1 Channel
The dispatch console user uses the Select Frequency command to change the Consolette's radio
channel. This will select items such as a talk group and an air interface type. The number of
channels that can be changed by the dispatcher is dependent on the Console. Gold Series Elite has
the capability for up to 12 channels. The MCC7500 has the capability for up to 255 channels through
the new T255R255 base type.
The Consolette is capable of 1250 channels and these can be accessed from the O5 control head.
When a Select Frequency command is received from the Console, the Consolette will send a
message to the mobile radio to steer it to the channel requested. Note that the channel number from
the Console is mapped linearly to a zone and channel in the mobile radio. For example, if each zone
has 5 channels, and the Console requests channel 8, the Consolette will steer the mobile to channel
3 in zone 2. If the mobile does not allow the indicated channel, the Consolette will generate a "bonk"
tone and remain in the current channel.
4.12.3.1.2 Coded/Clear
When a coded or clear (encryption on or off) command is received, the Consolette will send a
message to the mobile radio to set encryption to the indicated state. If the mobile does not allow the
indicated encryption state on the current channel, the Consolette will generate a "bonk" tone and
remain in the prior state. The coded or clear command from the Console is always associated with a
subsequent command to transmit.
4.12.3.1.3 Transmitting Voice
A console user makes a voice transmission on an ACIM Link channel using the same procedures
they use on an ASTRO conventional channel. First they ensure that the desired mode is set through
the Select Frequency feature. Then the console user also ensures that the correct secure mode and
CKR (if configured) are chosen.
NOTE: For encrypted voice calls, the Console sends the request for secure mode and the associated
CKR to the Consolette so the Consolette can encrypt the audio. The Console does not
encrypt the audio associated with coded mode calls.
September 9, 2011
Feature Operation: Wireline Interface
section 3.7.3.2
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