Making & Receiving Calls

This guide covers the complete call lifecycle in Landline, from initiating calls to ending them.

Call Types

Landline supports three types of communication:

Type Initiate Connection Audio
CALL Click Recipient must accept Two-way
OVERRIDE Shift + Click Immediate Two-way
MONITOR Ctrl + Click Immediate One-way (listen only)

Making a Call

Standard Call

  1. Find an online channel (green dot, colored border)
  2. Click the channel button
  3. A "Connecting..." indicator appears
  4. Dialing tone plays every 5 seconds while waiting
  5. When recipient accepts, call becomes active

Override Call

  1. Hold Shift and click the channel
  2. Connection is immediate - no acceptance required
  3. Recipient sees "OVERRIDE" notification
  4. Both parties can speak and hear each other
Use Override Responsibly
Override interrupts whatever the recipient is doing. Reserve it for time-critical situations like traffic conflicts, emergencies, or urgent coordination needs.

Monitor

  1. Hold Ctrl and click the channel
  2. Connection is immediate
  3. You can hear the target but they cannot hear you
  4. Recipient sees "MONITOR" notification with your callsign
  5. Recipient can terminate monitoring if desired
When to Monitor
Use monitoring to check if a controller is busy on frequency before calling, avoiding interruptions during radio transmissions.

Receiving Calls

Incoming calls appear in the Pending Calls panel on the right side of the window:

Pending Call Display

Ring Time

Calls ring for a configured amount of time (default: 30 seconds). If not answered within this time, the call automatically ends.

Audio Alerts

Alert Trigger Interval
Incoming call ring Standard call pending Every 3 seconds
Override alert Being overridden On connection
Monitor alert Being monitored Every 8 seconds
Dialing tone Waiting for acceptance Every 5 seconds
Imperial March Call from TMU position On ring (if enabled)

Active Call Panel

Once a call is accepted, it appears in the Active Call panel:

┌────────────────────────────┐
│      Active Call             │
├────────────────────────────┤
│                              │
│    JFK_TWR                   │
│    JFK Tower                 │
│                              │
│    ⏱ 2:34                    │
│                              │
│  [⏸ Hold]  [↩ Transfer]      │
│                              │
│       [◉ End Call]           │
│                              │
└────────────────────────────┘

Active Call Controls

Button Action
Hold Pause call audio (both directions muted)
Transfer Open transfer options menu
End Call Terminate the call

Hold

Placing a call on hold:

Multiple Calls

Landline allows handling multiple calls simultaneously:

Call Limits
At maximum capacity (2 calls), you must end or merge a call before accepting new ones. The merge option allows combining your held and incoming calls into a conference.

Cannot Call

You cannot initiate calls to:

Call Flow Diagram

                    INITIATING CALL
                          |
          +---------------+---------------+
          |               |               |
        Click        Shift+Click      Ctrl+Click
          |               |               |
      [RINGING]     [CONNECTED]     [MONITORING]
          |               |               |
    +-----+-----+         |               |
    |           |         |               |
 Accept     Reject        |               |
    |           |         |               |
[CONNECTED]  [END]        |               |
    |                     |               |
    +----------+----------+               |
               |                          |
         +-----+-----+                    |
         |           |                    |
       Hold      Transfer                 |
         |           |                    |
     [ON HOLD]  [TRANSFER]                |
         |           |                    |
      Resume         |                    |
         |           |                    |
         +-----+-----+                    |
               |                          |
            End Call                    End
               |                          |
             [END]                      [END]

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