What Is a Softphone? Benefits and How to Use One

Quick Answer

A softphone is a software application that lets a computer, tablet, or smartphone function as a telephone. Instead of a physical handset, it uses the device's microphone, speaker (or headset) and an internet connection to place and receive VoIP calls, usually over SIP.

What Is a Softphone?

A softphone is the software counterpart of a desk phone. It presents a familiar dial pad and call interface on screen and connects to your PBX or SIP provider. Because it is just an app, it can run on laptops, desktops, and mobile devices.

Definition: A softphone is a software-based phone client that places and receives VoIP calls using a device's network connection and audio hardware.

How a Softphone Works

1. It registers to a PBX or SIP service using your extension credentials.
2. When you dial, SIP signals the call and negotiates a codec.
3. Audio is captured by your mic, encoded, and sent as RTP packets.
4. Incoming calls ring the app like a normal phone.

Benefits of a Softphone

• Mobility: take your extension anywhere with internet.
• Cost: no dedicated handset required for many users.
• Integration: click-to-call from CRM, chat, and email.
• Features: conferencing, transfer, and presence in one window.
• Fast onboarding: deploy by installing an app, not wiring a phone.

Softphone vs. IP Phone

Frequently Asked Questions

Do I need a headset for a softphone?

A headset improves comfort and audio isolation, though a device's built-in mic and speakers also work.

Can a softphone replace a desk phone?

For many users yes, especially remote staff, though reception and shared areas often still use hardware phones.

Is a softphone secure?

Yes when using TLS/SRTP and strong credentials, the same as other VoIP endpoints.

Conclusion

A softphone turns everyday devices into fully featured business phones, boosting mobility and reducing hardware needs. Newrock's IP PBX platforms support SIP softphone clients so teams can take their extensions anywhere.