retronetcall OCTOI status update

2022/retronetcall-octoi_status_update/octoi_status_update.adoc

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+OCTOI (Osmocom Community TDM over IP) Status Update
+===================================================
+:author:	Harald Welte <laforge@gnumonks.org>
+:copyright:	2022 by Harald Welte (License: CC-BY-SA)
+:backend:	slidy
+:max-width:	45em
+
+
+== Overview
+
+* Brief OCTOI Intro
+* migration to co-located hub complete
+* osmo-e1d status update
+* new osmo-isdntap project
+* OCTOI BERT problems
+* Octoi Event PBX
+* yate problems regarding call.answer
+* resuming work on the BRI interface
+
+
+== OCTOI in a nutshell
+
+* community TDM network on top of the Internet
+* to interconnect classic TDM and ISDN equipment in absence of public networks
+* audience
+** retrocomputing folks with interest in data communications
+** hopefully at some point also museums
+
+== migration to co-located hub
+
+* noris.net provides free power/connectivity/colo for us (thanks!)
+* lots of preparatory work to get GPS signal to "our" rack
+** https://osmocom.org/issues/5542[OS#5542], https://osmocom.org/issues/5624[OS#5624], https://osmocom.org/issues/5626[OS#5626], https://osmocom.org/issues/5627[OS#5627]
+* physical setup in mid-September
+* C*NET ENUM routing change on October 1st
+* Users all migrated (https://osmocom.org/issues/5690[OS#5690]
+* https://osmocom.org/projects/octoi/wiki/Colocated_Hub
+
+== software setup at co-located hub
+
+* AVSt server
+** DIVF VM: 2x Digium TE820 passed through via SRV-IO
+*** runs `osmo-e1d` with dahdi-trunkdev for remote TDMoIP links
+*** runs `yate` as simulated central switch
+*** runs `osmo-isdntap` to record calls
+** grafana LSC for https://stats.retronetworking.org/
+** services LXC for future services (e.g. telnet services)
+** openvpn LXC for remote access to event PBXs
+** synchronet LXC to experiment with our own synchronet BBS
+
+== `osmo-e1d` status update
+
+* support for https://osmocom.org/projects/e1-t1-adapter/wiki/E1_tracer[e1-tracer hardware]
+* osmo-1d now finally has a https://downloads.osmocom.org/docs/latest/osmoe1d-usermanual.pdf[user manual]
+* rpm packaging (spec file thanks to @roox) for openSUSE Tumbleweed + CentOS8
+
+== `osmo-isdntap` project
+
+* we already can record raw E1 lines (e1-tracer, osmo-e1-recorder, ...)
+** that was useful for getting a few minutes/hours of Abis traffic for OsmoBSC etc.
+* for ISDN PRI use cases, we'd want
+** pcap files of D-channel traffic
+** raw captures of B-channel data
+
+The b-channel recorded data should help us understand more of the B-channel protocols (X.75, T.70, G4 fax, V.110,
+V.120, H.21, ...)
+
+== `osmo-isdntap` project
+
+* very simple hack at this point
+* create RXMIRROR + TXMIRROR of DAHDI D-channel
+* filter all Q.921/LAPD I frames
+* simplistic decode of Q.391 message types
+* detect whenever an exclusive B-channel is assigned (start recording)
+* detect whenever a call is disconnected (stop recording)
+
+== OCTOI event PBX
+
+* A _modded_ Auerswald COMmander Basic 2 19"
+** internal icE1usb for OCTOI connection
+** internal beaglebone green (Linux SBC) for running `osmo-e1d`
+
+Fully plug+play setup for having a few S0/BRI and analog PSTN ports at an event
+
+One unit complete, three other units almost finished (waiting for icE1usb production)
+
+== BERT problems
+
+* https://osmocom.org/issues/5694
+
+== yate problems regarding missing call.answer
+
+* TBD
+
+== resuming work on the BRI interface
+
+* https://osmocom.org/issues/5417
+
+== EOF
+
+End of File