Motorola APX 7500, Подробное руководство по обслуживанию

Страница: 75 / 164

68009482001 September 9, 2011
Feature Operation: Emergency Alarm Decode 4-5
NOTE: There is no softmenu or label support on the auxiliary display to indicate the functionality of
these buttons.
4.11 Emergency Alarm Decode
The APX Consolette supports Emergency Alarm decode on MDC Conventional, ASTRO
Conventional, Type II Trunking and APCO P25 Trunking signaling types. Using APX 7500 CPS, the
Consolette can be configured to display the ID on the attached O5 control head (if present), sound
an alert tone, and activate a general purpose output when an Emergency Alarm is decoded.
NOTE: The Consolette’s transceiver can only detect trunking Emergency Alarms when on the control
channel. If the Consolette is on a voice channel, it will not be able to decode the control
channel and will miss the Emergency Alarm. This feature is not recommended for high usage
systems if the Consolette is the only device decoding the alarms.
IDs can also be provided to the ACIM interface. The APX Consolette has the ability to generate an
Emergency ACK in response to receiving the Emergency Alarm via its ACIM interface. Refer to the
ACIM
section 4.12.3 for further details.
4.12 Wireline Interface
The Consolette supports a balanced Wireline Interface on a dedicated RJ45 on its rear panel. The
Wireline supports:
• 2-wire or 4-wire operation
• 600-ohm loading or open bridge on both the receive and transmit paths
These settings are made using the Consolette Configuration Codeplug.
The receive path contains receive audio and tones (ex. Talk Permit Tones). It is muted when there is
no valid audio. If “TRC Enabled” is selected in the Consolette Configuration, the DSP will filter the
TRC guard tone from the received audio in order to prevent guard tone false detects on the wireline.
A linear gain adjustment can be made on this path using the Consolette Configuration Codeplug.
Note: In order for the trunking tones to be heard at the remote location, the remote device must be
configured for full duplex operation. This is so that when the user presses the Push-to-Talk button at
the remote, the remote will unmute its speaker to trunking tones on the wireline. (ex. the MIP5000
must have all channels configured for full duplex in order for it to unmute to the trunking tones).
The transmit path supports two types of gain adjustments: Linear and AGC (Automatic Gain
Control). AGC is only if TRC is enabled. This can be enabled or disabled via the Consolette
Configuration Codeplug. For more information regarding the tuning procedures of the wireline paths,
refer to Section 2.7.3.1
This interface can be used in conjunction with an E&M interface, Tone Remote Control, or ACIM
interface.
4.12.1 E&M with Wireline
E & M operation is provided by the Wireline Interface in conjunction with:
• Hardware PTT – an input to the rear panel DB25 that when asserted by an external device
causes the Consolette to transmit the audio that is currently on the wireline path.
• Chan_Act_Relay_Out – a rear panel DB25 output of a normally open onboard relay which
closes (and routes rear panel DB25 relay input Chan_Act_Relay_In) when the Consolette is
receiving qualified audio.