Hold, resume and juggle calls
Put a call on hold, take another, and switch between them without losing either. Included in the free plan.
Shown with demo accounts and sample numbers.
How hold works
When you press Hold, SIPdia sends a re-INVITE that marks the audio stream as send-only or inactive, as described in RFC 3264. The server then plays hold music or silence to the other party. Resume sends another re-INVITE that restores two-way audio.
Several calls at once
- Use Add call to dial a second number; the first call goes on hold.
- When a second call rings while you are on a call, you can answer it; the first is held.
- Switch between calls from the call screen. Only one call is active at a time; the others are held.
- From two open calls you can start an attended transfer.
Platform notes
- Mac: Hold is ⇧⌘H. The floating call window shows every call and its state.
- iPhone and iPad: Hold is a button on the in-call screen. CallKit keeps the call visible in the status bar while you use other apps, and a held call stays held if a cellular call comes in.
Frequently asked questions
Does the caller hear music on hold?
That depends on the server. Most PBXs play their own hold music when SIPdia signals hold; a direct provider account may play silence or a tone.
How many calls can SIPdia handle at once?
More than one. You can hold a call, take or make another, and switch between them. The practical limit is the number of calls your PBX allows per extension.
Is there a keyboard shortcut for hold on the Mac?
Yes. Hold is ⇧⌘H, Mute ⇧⌘M, Answer ⇧⌘A, Hang up ⇧⌘E and Record ⇧⌘R.
Does recording continue through hold?
Yes. The recorder keeps running while the call is on hold and resumes capturing audio when you resume the call.
Get SIPdia for your Mac, iPhone or iPad
Bring the SIP account you already have. The Mac and iPhone apps are in release preparation; download links appear on the download page when each release is live.