Service manual

EXTERNAL SERIAL CONTROL PROTOCOL
B-11
April 2001
Part No. 001-9800-203
CMD REQUEST SOFTWARE VERSION
Function
: This opcode requests the subscriber unit to
send an INFO SOFTWARE VERSION message
indicating the current subscriber unit software
version (see page B-20).
Origin
: External device
Format
:
Data
: None
CMD REQUEST SYSTEM GROUP
Function
: This opcode requests the subscriber unit to
send an INFO SYSTEM GROUP message indi-
cating the current subscriber unit bank, system, and
group selections. If the subscriber unit is actively
scanning, the returned information identifies the
revert system and group.
Origin
: External device
Format
:
Data
: None
CMD REQUEST SYSTEM NAMES
Function
: This opcode requests that the subscriber unit
send a series of INFO SYSTEM NAME messages
(see page B-21) indicating all of the programmed
systems in the current bank.
Origin
: External device
Format
:
Data
: None
CMD UI NOTIFICATIONS
Function
: Directs the subscriber unit to asynchro-
nously broadcast or not broadcast user interface
notifications. This allows an external device that is
acting as a remote control head to keep up-to-date
with changes in the user interface display and user
interactions with the subscriber unit.
Format
:
Data
:
Flags: Bit flags indicating the external device
either wants the notification type (bit = 1) or
does not want the notification type (bit = 0).
On Subscriber Unit reset, all notifications are
disabled. Refer to Table B-4 for more
information.
EVENT AUDIO GATE
Function
: This message requests the destination
address to perform the requested audio muting or
enabling specified in the message. Note that in the
subscriber unit, muting and enabling are two sepa-
rate logical gates (one physical gate) that maintain
a request count. Muting has a higher priority than
enabling, so if any mute requests are outstanding,
the gate is muted.
When the mute request count goes to zero with
any enable requests outstanding, the gate is
unmuted. The subscriber unit arbitrates the mute
and unmute requests so that when it sends an
EVENT AUDIO GATE message, it only sends
Opcode
8 bits
0x39
Opcode
8 bits
0x3a
Opcode
8 bits
0x38
Opcode Flags
8 bits 2 bytes
0x3b