Integrated Services Digital Network (ISDN) is a set of communication standards for simultaneous digital transmission of voice, video, data, and other network services over the traditional circuits of the public switched telephone network.

A repository for the PBX (Private Branch eXchange) project on Linux

E1 transceiver based around LIU; mirror of https://gitea.osmocom.org/retronetworking/osmo-e1-xcvr

The Cryptofon Project aims to design a universal narrowband voice and text / data narrowband communication standard, that is encrypted and flexible to adapt for existing narrowband communication systems - aimed to be a more secure and open alternative to the propietary Secure Communications Interoperability Protocol (SCIP)

Eclipse TITAN test port for E1 timeslots; mirror of https://gitea.osmocom.org/ttcn3/titan.TestPorts.E1

Osmocom open source E1 (TDM) hardware; mirror of https://gitea.osmocom.org/retronetworking/osmo-e1-hardware

E1 TDM interface daemon for icE1usb open source E1 USB interface; mirror of https://gitea.osmocom.org/retronetworking/osmo-e1d

Osmocom fork of DAHDI telephony drivers; re-introduces support for old hardware and adds support for Osmocom OSHW E1 adapter

H.323 ISDN Gateway

Osmocom E1 recorder for DAHDI; mirror of https://gitea.osmocom.org/cellular-infrastructure/osmo-e1-recorder

Osmocom Media Gateway (MGW); speaks RTP and E1 as well as MGCP; mirrored from https://gitea.osmocom.org/cellular-infrastructure/osmo-mgw

Notifies you about incoming/outgoing calls of a Auerswald COMpact 3000

Osmocom Abis interface library; mirrored from https://gitea.osmocom.org/osmocom/libosmo-abis

modular ISDN kernel driver

PRI Library