Hi all, To 3CX devs - great product, many thanks. But I have a problem with 7.1 beta and the version 7.0 before it. Previously on 6.x I've had no problems with DDI but when I upgrade following the documented procedure: backup - uninstall - install - restore; my DDIs do not work. The main number that's bound to the VoIP provider works ok but DDIs that are carried by that same provider do not. This is the successful main number that works: 08:59:51.670 [CM503004]: Call(6): Calling: RingAll800:100Ext.100103Ext.103101Ext.101107Ext.107@[Dev:sip:email@example.com:5060, Dev:sip:firstname.lastname@example.org:5060, Dev:sip:email@example.com:5060] 08:59:51.654 [CM503010]: Making route(s) to <sip:firstname.lastname@example.org:5060> 08:59:51.654 [CM505003]: Provider:[Magrathea] Device info: Device Not Identified: User Agent not matched; Capabilities:[reinvite, replaces, able-no-sdp, recvonly] UserAgent: [MSSGW] Transport: [sip:22.214.171.124:5060] 08:59:51.654 [CM503001]: Call(6): Incoming call from 077123123123@(Ln.10002@Magrathea) to <sip:email@example.com:5060> This is the one that fails: 09:03:27.753 [CM500002]: Unidentified incoming call. Review INVITE and adjust source identification: INVITE sip:0207DDI DDI@126.96.36.199 SIP/2.0 Via: SIP/2.0/UDP 188.8.131.52;branch=z9hG4bKc3c6.3bff0036.0 Via: SIP/2.0/UDP 184.108.40.206:5060;branch=z9hG4bK49C4E221AD Max-Forwards: 14 Record-Route: <sip:220.127.116.11;lr=on;ftag=237884C0-C1A> Contact: <sip:firstname.lastname@example.org:5060> To: <sip:44207DDIDDIDDI@n.e164.org.uk> From: "0771231231236"<sip:email@example.com>;tag=237884C0-C1A Call-ID: DF9E76-7D211DE-9EE9D4B2-5B8D3061@18.104.22.168 CSeq: 101 INVITE Expires: 180 Min-SE: 1800 Allow: INVITE, BYE, CANCEL, ACK Date: Wed, 04 Mar 2009 09:02:20 gmt Supported: 100rel, timer, resource-priority, replaces Timestamp: 1236157340 User-Agent: MSSGW Allow-Events: telephone-event Content-Length: 0 Remote-Party-ID: <sip:firstname.lastname@example.org>;party=calling;screen=yes;privacy=off I've tried entering the DDI as either 0207DDIDDIDDI 44207DDIDDIDDI It's not just the one DDI, cant make any of them work. Any suggestions welcome. Thanks. Paul. Fixed it - there's an entry in Edit Port [VoiP provider main number] for Source Identification by DID Thanks anyway. Paul.