---
name: "81voltd"
section: "1"
platform: "linux"
package: "81voltd"
version: "1.0.0-1+b1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/81voltd"
---

# 81voltd(1)

Server-side implementation of the QMI IMS Data service

## NAME

81voltd - Server-side implementation of the QMI IMS Data service

## SYNOPSIS

**81voltd**

## DESCRIPTION

**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.

## COPYRIGHT

Copyright (C) 2024 Richard Acayan \<https://gitlab.postmarketos.org/modem/81voltd\>