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Documentation Index

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A call queue is a waiting line for callers. When someone calls and all your agents are busy, the caller hears hold music and waits until an agent becomes available. Queues are essential for support teams, sales teams, and any group that handles incoming calls.

Create a new queue

1

Open the Queues page

Click Queues in the sidebar under Configure.
2

Click Add Queue

Click the Add Queue button (plus icon) in the top-right corner.
3

Fill in the basic settings

FieldWhat to enterExample
NameA name for this queueSupport Queue
ExtensionA unique number for this queue5001
StrategyHow calls are distributed to agentsRing All
TimeoutHow many seconds to ring before trying next agent15
4

Click Create

The queue is created. Now you need to add agents to it.

Queue strategies

The strategy determines how Astradial picks which agent to ring:
StrategyHow it works
Ring AllRings every available agent at the same time. First to answer gets the call.
Least RecentRings the agent who has gone the longest without taking a call.
Fewest CallsRings the agent who has taken the fewest calls overall.
RandomRandomly picks an available agent.
Round RobinCycles through agents in order, remembering who was last.
LinearGoes through agents in a fixed order, always starting from the first.
Ring All is the best choice for small teams. For larger teams, Round Robin or Least Recent distributes calls more evenly.

Edit queue settings

Click the three-dot menu on any queue and select Edit to open the full settings dialog:

Basic settings

  • Name and Extension — Change the queue’s identity
  • Strategy — Change how calls are distributed
  • Ring Timeout — How many seconds to ring agents before giving up (default: 15)
  • Max Wait — Maximum seconds a caller will wait in the queue (default: 45)
  • Status — Active, Inactive, or Paused

Timeout routing

When no agent answers within the timeout, you can route the call somewhere else:
  • Extension — Send to a specific person’s extension
  • Queue — Send to another queue
  • Phone Number — Forward to an external number

Music on hold

Choose what callers hear while waiting:
  • Default — The system’s built-in hold music
  • Custom classes — Music you have uploaded (see Music on hold)

Greeting

Select a greeting that plays when a caller first enters the queue. You can create custom greetings using text-to-speech.

Members

View and manage the agents assigned to this queue:
  • See all current members with their names and extensions
  • Remove a member by clicking the X button
  • Add new members from the dropdown (only shows active users not already in the queue)

Music on hold

You can upload custom audio files for callers to hear while waiting.

Upload audio

  1. Click the Upload Audio button at the top of the Queues page
  2. Enter a class name (like “custom” or “jazz”)
  3. Choose an audio file (MP3, WAV, OGG, FLAC, M4A, or AAC)
  4. Click Upload
The file is automatically converted to the correct format for Asterisk.

Preview audio

Click the Play button next to any audio file to hear it. A player bar appears at the bottom of the screen.

Delete audio

Click the Trash icon next to a custom audio file to remove it. System default files cannot be deleted.

Greetings (text-to-speech)

Create spoken greetings that play when callers enter a queue.

Create a greeting

  1. Click Create Greeting at the top of the Queues page
  2. Enter a name for the greeting
  3. Type the greeting text — what you want the voice to say
  4. Select a language (English India, English US, Hindi, or Tamil)
  5. Select a voice (male or female options)
  6. Click Create
Astradial generates the audio using Google’s Wavenet voices. Once generated, you can:
  • Preview it by clicking the Play button
  • Enable/Disable it by clicking the status badge
  • Select it in any queue’s edit dialog under the Greeting dropdown
  • Delete it from the dropdown menu

Example greeting text

“Welcome to Grand Estancia. Please hold while we connect you to a team member. Your call is important to us.”