Sip:phone

Sip:phone is a mobile client that connects Android and iOS devices to Sipwise Class 5 Softswitch and CPBX services over broadband. It lets users extend an existing business phone system to mobile devices. Operators using Sipwise NGCP can customize the interface and publish the app under their own name. Subscribers are activated on Sipwise C5 through its web interface or REST API, then sign in with a password or a server-generated QR code. Calling tools include audio and video, hold, two simultaneous calls, three-way conferences, and blind or attended transfers. The app can synchronize phone contacts with Sipwise C5 subscribers and show presence for favorite contacts. Administrators can choose whether a desk phone or mobile app rings first, or set either device to ring alone. The app requires an existing Sipwise server account and does not work properly with arbitrary SIP providers or Sipwise deployments. It is not intended to place or support emergency calls. The App Store download is free; the commercial app requires a license, with pricing available from Sipwise Sales.

Sip:phone provides business call handling on mobile devices for organizations using Sipwise C5 or CPBX. Confirm account, licensing and deployment requirements with Sipwise Sales before choosing it.

Sip:phone suits operators using Sipwise NGCP who want to offer a branded mobile extension to an existing business phone system. It requires a Sipwise server account and is not designed for emergency calls.

Overview

Sip:phone turns an organization’s Sipwise C5 or CPBX phone service into a mobile extension for Android and iOS. It best suits operators and businesses already running Sipwise who want staff to handle business calls away from their desks. Its call controls and operator branding are useful within that system; its dependence on a Sipwise account makes it a poor fit for anyone seeking a general SIP dialer.

Key features

Mobile users can make audio and video calls, hold calls, manage two simultaneous calls, start three-way conferences, and use blind or attended transfer. That covers common business call handling, but the two-call limit may be restrictive for staff who routinely manage several conversations at once.

Subscribers can change do not disturb, caller ID restriction, and ringing policy in the app. Administrators can set a desk phone and mobile to ring in sequence, choose which rings first, or have either device ring alone. Those controls help organizations decide how calls follow employees between devices, though they depend on the Sipwise service and its configuration.

Contacts synchronize with Sipwise C5 subscribers, and presence can be shown for favorite contacts. The app negotiates voice codecs from narrow-band to HD according to the available network. Sipwise C5’s Mobile Push Module uses the phone platform’s standard push notifications to launch the app for incoming calls or other notifications while aiming to reduce battery drain.

Operators can customize the interface and publish the app under their own name in the Apple and Google app stores. They manage and activate subscribers through Sipwise C5 interfaces such as its web interface or REST API; users can sign in with a username and password or scan a server-generated QR code. This makes the app a better match for operators with established provisioning and billing workflows than for individuals setting up a standalone softphone.

The app listing describes SIP communication as encrypted. Sip:phone requires an account on a Sipwise server and may not work properly with arbitrary SIP providers or deployments. It is not designed to place or support emergency calls, and using it as a default dialer may interfere with emergency dialing.

Pricing

The Apple App Store download is free, but it requires an existing sipwise.com server account. That price does not remove the platform requirement: Sipwise marks the app unavailable in Community Edition, while its PRO/Carrier version requires a Sip:Phone App license.

The commercial sip:phone app has custom pricing. Sipwise Sales handles pricing, licensing, and deployment guidance, as well as discussions about optional support and branding. A trial is available: operators can request a demo app for evaluation in a non-production environment. Buyers should confirm the required license and deployment fit with Sales before committing.

Platforms

Sip:phone is available for Android and iOS and integrates with Sipwise C5 and CPBX subscribers. Its API platform listing reflects its service integration, not compatibility with arbitrary SIP services. Organizations choosing it need the Sipwise system and account that the app depends on.

Who it's for

Sip:phone fits operators using Sipwise NGCP who want a branded mobile client tied into their subscriber provisioning and billing processes. It also suits businesses on Sipwise C5 or CPBX that need staff to use existing business numbers and call handling from mobile devices. Individuals, teams on other PBX platforms, and buyers looking for a general-purpose SIP client should look elsewhere.

Pros and cons

• Pros: Audio and video calling, conferencing, hold, and transfer give mobile staff a substantial set of business call controls.
• Pros: Subscriber settings and configurable deskphone/mobile ringing let organizations coordinate how employees receive calls across devices.
• Pros: Operator branding and subscriber provisioning support integration into an existing Sipwise service.
• Cons: The app depends on a Sipwise server account and a qualifying deployment, limiting its usefulness outside that ecosystem.
• Cons: Commercial use requires a separate license, with custom pricing that prospective buyers must obtain from Sales.
• Cons: The two-simultaneous-call limit and lack of emergency-call support constrain its role for some users.

Alternatives

For a broader set of softphone choices, browse Softphone Software. AGEphone is a better fit for personal use on Android, iOS, or Windows: its free edition is explicitly for personal use, with business use requiring AGEphone Cloud or Business.

Aria suits personal, non-commercial use across a wider range of platforms, with a free plan that includes unlimited calls and multiple accounts. Blink is another free option for Linux, Mac, or Windows downloads when you already have a SIP account; its listing also covers Android, iOS, and web platforms.

Bria Solo may suit someone seeking a lower-cost individual option: its free tier is limited to one device, one SIP/VoIP account, limited weekly calls, and non-commercial personal use, while Bria Solo costs $2.95 a year. Linphone is worth considering when open-source software or integration under the GNU GPLv3 matters; proprietary licensing is also available for closed-source projects.

PortSIP Softphone is a free alternative for users of PortSIP PBX, whose free edition supports up to two simultaneous calls and three extensions. Siperb Mobile Softphone offers a free Personal plan with limited storage, short log retention, community support, and no technical support. SipPulse Softphone may suit users seeking a free app across mobile and desktop platforms, with unlimited users and installations on its App SipPulse plan.

Verdict

Choose Sip:phone if your organization already runs Sipwise C5 or CPBX and needs a branded mobile extension with coordinated deskphone and mobile call handling. The integration and operator controls are its strongest reasons to buy; the required Sipwise deployment, separate commercial license, and custom pricing are the clearest reasons to choose another softphone.