OpenBSC August 2023

openbsc@lists.osmocom.org

11 participants
23 discussions

SMSC address terminology
by Mychaela Falconia 08 Aug '23

08 Aug '23

Hello fellow developers, I am getting ready to implement my own SMSC, connecting to Osmocom CN via GSUP (see OS#6135), and I have a question about SMSC address terminology. In traditional commercial GSM networks, the SMSC address visible to the user (prepended to the TPDU for MT SMs, stored in EF_SMSP record on the SIM for MO SMs) looks like a phone number in full international format, with TON=1 and NPI=1. For example, T-Mobile's SMSC address is +12063130004 (to an uninitiated eye it looks exactly like a regular phone number in Seattle, WA), while the SMSC of Mexican Telcel is +5294100001410 - one digit longer than regular phone numbers in Mexico, and a little irregular in structure. What is the correct term for these SC-address phone-number-thingies? Are they Global Titles - or is GT something different? If I were to make up fake global-looking SMSC addresses of this form, e.g., something like +1xxx55501xx for NANP territory, would it be correct to call such SC-address a fake Global Title? Just wondering... M~

2 1

EFR and/or AMR codec with Osmo-BSC/SIP-connector/Asterisk
by Sipos Csaba 07 Aug '23

07 Aug '23

Dear list, I managed to set up my E1 based Nokia BTS, the complete Osmo-CNI stack, SIP-connector and Asterisk. MO/MT calls do work as well as external SIP calls to and from mobile as well. But no matter what I do only plain FullRate calls are possible. Under osmo-bsc.conf code support is set like this (the BTS HW do support all of these codecs): codec-support fr efr amr but once I also add "codec-list fr3 fr2 fr1" to the MSC section of the osmo-bsc.conf, the calls wont establish anymore. I watched Neel's OsmoDevCall presentation on this topic, but it is not very clear what codecs are supported when osmo-sip-connector and an external PBX is used? Regards, Csaba

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OsmoBTS project
by catalinaelena119＠yahoo.com 07 Aug '23

07 Aug '23

I have git-cloned https://gitea.osmocom.org/cellular-infrastructure/osmo-bts this project in order to have a solution for calling 2 mobile phones in my own network. I dont have any experience with this. I have instaled and configured in the past the same solution from PenHerts git but it is a lil bit old. I want to configure and install this solution bu i do not know the exact steps to do that. I dont find any configuration file or i do not know what to do with them. I do not have any experince with this domain and i want to know the steps in order to run this project properly. Could you help me with any directions?

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OpenBSC August 2023