Hi All, Does anyone tried enabling the A5/1 Encryption using osmo-bsc and osmo-msc? We are using an UPBOARD with the following elements; osmo-bsc, osmo-bts-trx and osmo-trx in it; and a NUC with osmo-hlr, osmo-msc, osmo-mgcp, and osmo-stp. Both servers are using Ubuntu 16.04 OS. We enabled the a5/1 encryption in both osmo-bsc and osmo-msc. Then provisioned the programmable SIM to osmo-hlr with aud2g comp128v1 auth. OsmoHLR# subscriber imsi 515941234567890 show ID: 9 IMSI: 515941234567890 MSISDN: 09271234567 2G auth: COMP128v1 KI=00112233445566778899aabbccddeeff We are not really sure what causes the LOCUP Reject. Can anyone help us with this issue? Attached are the configuration used during the testing and a trace taken during the testing. Best Regard, Ron Menez ron.menez@entropysolution.com<mailto:ron.menez@entropysolution.com>