OTG Softphone

OTG Softphone is a business communication app designed for organizations that use PBX-based telephony and collaboration services. It gives users a professional mobile softphone experience with secure account login, business calling, voicemail access, presence visibility, chat, fax access, and call history in one application.

The app is built for business users who need to stay connected from anywhere using their PBX extension. OTG Softphone supports SIP-based voice calling, extension registration, in-call controls, caller information, and account-based communication features that integrate with supported PBX environments.

Key features include:

Business voice calling over PBX extension accounts
Secure login using administrator-provided credentials
Voicemail access
Presence and team status visibility
Chat and messaging support
Call history
Mobile-friendly interface for day-to-day business communication
OTG Softphone is intended for authenticated organizational users and may require administrator provisioning or PBX credentials before use.