From 07a878d23db94eae233513e1f8eaf986708492bc Mon Sep 17 00:00:00 2001 From: Harald Welte Date: Sat, 19 Nov 2022 10:52:46 +0100 Subject: [PATCH] retronetcall OCTOI status update --- .../octoi_status_update.adoc | 101 + .../octoi_status_update.html | 4187 +++++++++++++++++ 2 files changed, 4288 insertions(+) create mode 100644 2022/retronetcall-octoi_status_update/octoi_status_update.adoc create mode 100644 2022/retronetcall-octoi_status_update/octoi_status_update.html diff --git a/2022/retronetcall-octoi_status_update/octoi_status_update.adoc b/2022/retronetcall-octoi_status_update/octoi_status_update.adoc new file mode 100644 index 0000000..8c39dae --- /dev/null +++ b/2022/retronetcall-octoi_status_update/octoi_status_update.adoc @@ -0,0 +1,101 @@ +OCTOI (Osmocom Community TDM over IP) Status Update +=================================================== +:author: Harald Welte +: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 diff --git a/2022/retronetcall-octoi_status_update/octoi_status_update.html b/2022/retronetcall-octoi_status_update/octoi_status_update.html new file mode 100644 index 0000000..4839035 --- /dev/null +++ b/2022/retronetcall-octoi_status_update/octoi_status_update.html @@ -0,0 +1,4187 @@ + + + + +OCTOI (Osmocom Community TDM over IP) Status Update + + + + + + + + +
+

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

+
+ +
+
+
+

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 e1-tracer hardware + +
    • +
  • + +osmo-1d now finally has a 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

+
+ +
+
+
+

yate problems regarding missing call.answer

+
+
    +
  • + +TBD + +
    • +
+
+
+
+

resuming work on the BRI interface

+
+ +
+
+
+

EOF

+
+

End of File

+
+
+ +