81voltd(1)

81voltd1

Server-side implementation of the qmi ims data service

Usage

81voltd

Overview

81voltd is a simple implementation of the IMS Data service on QMI/QRTR. It handles the known and important requests to start and stop a connection through the ModemManager D-Bus API, treating other requests as no operation. The IMS Data service is mandatory to support voice call on 4G/5G mobile network.

Bugs

Stopping the implementation does not release or disconnect any bearers. This makes it hard to debug, requiring the modem be set to low-power, then back online.

ModemManager errors are not communicated to the modem.

From 81voltd 1.0.0-1+b1 in Debian 13 (Trixie). Parsed by carta from the page's man source.