Hi there, The wiki states that the above hangup cause is used when a call is hung up from the API. However, I've recently been getting some calls being hung up (often, oddly, multiple calls simultaneously - this is all on a system without automated calls) with this reason, eg: freeswitch.log.2013-04-16-13-16-57.1:2013-04-16 13:02:42.455796 [NOTICE] switch_core_session.c:246 Hangup sofia/sbc/02076084900@10.10.0.2 [CS_EXCHANGE_MEDIA] [MANAGER_REQUEST] freeswitch.log.2013-04-16-13-16-57.1:2013-04-16 13:02:42.455796 [NOTICE] switch_core_session.c:246 Hangup sofia/sbc/02076087470@10.10.0.2 [CS_EXCHANGE_MEDIA] [MANAGER_REQUEST] freeswitch.log.2013-04-16-13-16-57.1:2013-04-16 13:02:42.455796 [NOTICE] switch_core_session.c:246 Hangup sofia/sbc/2076087440@10.10.0.2 [CS_EXECUTE] [MANAGER_REQUEST] freeswitch.log.2013-04-16-13-16-57.1:2013-04-16 13:02:42.455796 [NOTICE] switch_core_session.c:246 Hangup sofia/sbc/02076087440@10.10.0.2 [CS_EXCHANGE_MEDIA] [MANAGER_REQUEST] freeswitch.log.2013-04-17-09-53-16.1:2013-04-17 09:35:42.115787 [NOTICE] switch_core_session.c:246 Hangup sofia/sbc-ext/+441768351327@88.215.61.195 [CS_EXECUTE] [MANAGER_REQUEST] freeswitch.log.2013-04-17-09-53-16.1:2013-04-17 09:35:42.115787 [NOTICE] switch_core_session.c:246 Hangup sofia/sbc-ext/+441502563921@88.215.61.195 [CS_EXECUTE] [MANAGER_REQUEST] freeswitch.log.2013-04-17-09-53-16.1:2013-04-17 09:35:42.115787 [NOTICE] switch_core_session.c:246 Hangup sofia/sbc-ext/+441325460860@88.215.61.195 [CS_EXECUTE] [MANAGER_REQUEST] freeswitch.log.2013-04-17-09-53-16.1:2013-04-17 09:35:42.115787 [NOTICE] switch_core_session.c:246 Hangup sofia/sbc-ext/+447870616904@88.215.61.195 [CS_EXECUTE] [MANAGER_REQUEST] freeswitch.log.2013-04-17-09-53-16.1:2013-04-17 09:35:42.115787 [NOTICE] switch_core_session.c:246 Hangup sofia/sbc-ext/+441325385210@88.215.61.195 [CS_EXECUTE] [MANAGER_REQUEST] Is there any other reason that could produce this Cause code? I am *definitely* not executing any api commands to hang up channels. Thanks Alex -- This message is intended only for the addressee and may contain confidential information. Unless you are that person, you may not disclose its contents or use it in any way and are requested to delete the message along with any attachments and notify us immediately. "Transact" is operated by Integrated Financial Arrangements plc. 29 Clement's Lane, London EC4N 7AE. Tel: (020) 7608 4900 Fax: (020) 7608 5300. (Registered office: as above; Registered in England and Wales under number: 3727592). Authorised and regulated by the Financial Conduct Authority (entered on the Financial Services Register; no. 190856).