6. PTT Calling

The dispatchers can make the following types of PTT calls:

  • One-to-One call – Place a call to an individual fleet member.
  • Talkgroup call – Place a call to a pre-defined talkgroup created by the corporate admin or personalized My Talkgroup and area talkgroup created by the dispatcher.
  • Quick Group call – A Quick Group call is a call consisting of selected fleet members. Quick Group calls are special purpose talkgroups that are used only once. If the dispatcher uses a talkgroup often, the dispatcher should have the corporate admin create the talkgroup for them or create My Talkgroup.
  • Broadcast call – A Broadcast Call is a call that allows a designated broadcaster to make high priority calls typically used for making important announcements.
  • Voice Message Fall Back – PTT Voice Message fall back allows a PTT call to be converted into a voice message and send a voice message if the call to called member cannot be delivered (e.g., Do Not Disturb, Offline, Busy, Temporarily Unavailable). The minimum length of a valid voice message fall back recording is configurable system-wide (1–15 seconds, default = 3 seconds). Therefore, when a voice message fall back occurs, and the subscriber recording is less than 3 seconds, then the voice message is discarded.
  • Emergency Call – An emergency call is a high priority call in which dispatcher initiates an emergency for the target user. The destinations of the target user (also dispatcher, if configured for the target user) then press the PTT button to start the emergency call. An alert in sent to the configured emergency destinations.
  • Ambient Listening – An ambient listening is a special type of call in which dispatcher can listen to the surroundings of the fleet member. Once dispatcher activates the ambient listening the PTT button changes to ambient listening.
  • Discreet Listening – A discreet listening is a special type of call in which the dispatcher can listen to the fleet member’s conversations. Once dispatcher activates the discreet listening the PTT button changes to discreet listening.

In addition to having the ability to select an individual contact or talkgroup for a call, the dispatchers can select and place calls to fleet members from the alerts window, map window, message window, map info window, map selection list window and logs window (call logs, geofence logs and alert logs). Depending on the configured settings, desktop notifications will be displayed for all type of calls if Dispatch browser is in minimized mode or not on the active tab.

6.1   Call Ready State

When the dispatcher selects a contact or talkgroup from any window and click the call button, the Call Activity Window changes to a “Call Ready” state. When the call ends, the ‘Call Activity’ window will switch back to a ‘Call Ready‘ state for the last dialed or received call for easy redialing until the dispatcher has selected some fleet member on the map. The following image shows a call ready screen.

6.2   Call Activity Window

The Call Activity Window enables the dispatchers to initiate calls by clicking and holding the PTT button or pressing PTT button through supported accessories. A Call type status appears in the top of the Call Activity window. In addition to the PTT call, call recording and call end button, the call activity window shows the call type, call duration and the talker. A slider button in the call activity window shows the members detail in talkgroup call. The appearance of the PTT button changes when the emergency is initiated.

6.3   Recording Calls

The recording feature allows the dispatcher to record PTT calls. The only calls that are recorded are the ones where the dispatcher is a participant. The following sections describe the recording options that are available to the dispatchers.

6.3.1  Record Always

Record always allows the dispatchers to record each call the dispatcher joins. If there is any selection of contact or talkgroup on the map, then the same will be added to call ready state. All the calls where the dispatcher is a participant will be recorded until the dispatcher switches back to Record Manually from the Settings tab. In Record Always mode, the following behavior is observed for a call. The recording status is indicated by the record icon on the Call Activity window.

When the call ends, the call entry is created and automatically stored in the call history. When next call starts, the call is automatically recorded and stored as a new entry.

6.3.2  Record Manually

Manual recording allows recording of the whole or part of the call by using the start and stop record button whenever recording is desired. Every time the dispatcher stops recording, a new log record is created.

6.3.3  Exporting a Recorded Call Conversation

The recorded call conversations can be exported to the download folder configured on the web browser. The Dispatcher can export single or multiple call records at a time. The exported file which is in ZIP format, contains the details of calls in HTML format and a link to the call recording file which is in MP3 format.

6.3.4  Playing Back Recorded Calls

Recorded calls are stored in the call logs. The dispatchers can select and play back any recorded call. The following image shows a recorded call log being played.

6.4   Supervisory Override (Talker Priority)

A dispatcher is designated as a supervisor by default. A dispatch talkgroup can have supervisors other than dispatchers assigned to it as well. When there are both dispatchers and supervisors in a dispatch group, dispatchers will be given higher talker priority over the supervisors. That means that a dispatcher can take the floor and speak at any time during a call, even if a supervisor or someone else is currently speaking.

6.5   Broadcast Calling

Broadcast calling provides the ability for a dispatcher or PTT subscriber (called the broadcaster) to make a one-way, high-priority call to a group of subscribers. Large subscriber groups up to 500 members are supported, and calls are delivered in a manner (called “call batching”) that increases the likelihood that a larger number of co-located subscribers can receive the call. Incoming broadcast calls have a preamble tone and will preempt ongoing calls, including priority scan list calls. Other broadcast calls do not preempts broadcast calls. Broadcast groups are created and administered by the Corporate Admin through the Central Admin Tool. Each group can be configured to override the Do Not Disturb (DND) availability state set by the subscriber for important calls.

6.6   Using Accessories

The Dispatch supports following audio devices and floor control devices:

  1. Input Devices
    1. External Microphone (1/8” jack)
    2. Headset with PTT (USB)
    3. Internal Microphone (supported by system hardware).
  2. Output Devices
    1. External Speakers (USB, 1/8” jack)
    2. Headset with PTT (USB)
    3. Internal Speakers (supported by system hardware).
6.6.1 Accessory Specifications

The following accessories can be used with the Dispatch.

Table 6.1 – Accessory Specifications

Item Part Number Description
Headset HW251N Plantronics Supra Plus Monaural Wideband NC
PTT Adapter with Headset Jack SHS2355-01 Plantronics USB Push to Talk to H-Series, monaural
Foot pedal/switch – FSSP2646-01 FSSP2646-01 Plantronics USB PTT Footswitch
Foot Pedal USB FTT-300 USB PTT Footswitch
Desktop Microphone Assembly SSP 2753-01 Plantronics USB Desktop PTT Microphone
Desktop Microphone Assembly IPT-M180 Plantronics Wide base Table Microphone
Desktop Microphone Assembly IST 10722 Buddy Headset Mic (If configured only as a joystick event device)
Desktop Microphone Assembly IST 10735 Buddy Desktop Mic (If configured only as a joystick event device)
Slim™ Microphone/Speaker Station None USB Desktop PTT Microphone/ Speaker
Updated on July 31, 2019

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