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  1. Connecting 3cx to existing PABX

    Connecting PBX’s to 3CX is something that we have done a few times now, and it is possible. Essentially there is an ISDN gateway that will connect the ISDN lines, the ISDN PBX and the SIP 3CX. DDI numbers are mapped at the gateway either to 3CX or to the OmniPCX, dependant on whether the...
  2. RTX Dect Phones

    Hi, I have just tried that and it worked OK. There was must be a difference between yoour setup and mine. 3CX is v11 SP3, the RTX base stations are 01.79. Only 1 server is defined without a proxy. 3CX settings in "other" on extension has supports re-invite unticked. I am not sure why this...
  3. Can't reactivate V7 license after having to restore

    Hi, I suggest that you upgrade to a later version. If you have a backup this should be quite easy to do. Uninstall v7, Install version 8 and restore, check that all is working, backup again. Then uninstall v8, restore then install V9 and restore - until you get to V11. You will then have an...
  4. Distributing inbound calls using SIP forking

    Dear Forum, I felt that this may be useful, so wanted to share it with you all. This solution allows more calls by simply adding additional SIP trunk ADSL lines. We had an issue where we had one dedicated SIP trunk line with Spitfire (in the UK), but found that we were losing lots of calls...
  5. redundant internet connections supporting (2) 3CX systems

    Re: redundant internet connections supporting (2) 3CX system Hi, This week we have setup a 3CX with 3 redundant Internet connections - and can support upto 4 using STUN. This is using a Draytek 3200. If you disconnect the main connection used for VoIP it re-configures quickly to use one of...
  6. redundant internet connections supporting (2) 3CX systems

    Re: redundant internet connections supporting (2) 3CX system Hi, Unfortunately I have no experience of running DDNS on the 3CX machine. There was must be some good clients out there which you could test. The good thing about having DDNS on the router is that the router knows when a WAN...
  7. redundant internet connections supporting (2) 3CX systems

    Re: redundant internet connections supporting (2) 3CX system Hi, I hope to try to answer both of your questions:- 1) In my experience it is better to use separate LANs or VLANs for each 3CX. However, we have succeeded in connecting them on one subnet. Here are a couple of ways around it. The...
  8. Connecting two gateway in different location over internet

    Re: Connecting two gateway in different location over intern Hi, There are two ways that you could do this:- 1. Use a VPN to the location where the remote gateway is based. It's likely that you will need to replace the router to do this at each end. The Draytek 2830 would work well. Make...
  9. Latency and Call Quality Issues, Especially in Remote Office

    Re: Latency and Call Quality Issues, Especially in Remote Of Hi, We have carried out a few quite large installations. It seems to me that most of the problems are related to access for the branch office. To connect remote sites we use routers that support both QOS and VPN. This ensures that...
  10. 3CX SIP Trunk Cisco UCM Help

    Hi, We had a project where we needed to changeover one phone at a time meaning that the old phone system had to be retained until all were changed over. To make calls to the old Asterisk based system we used a bridge. This might work with one end slave, the other master. Another method, if...
  11. RTX Dect Phones

    Hi, Thanks for your document and noted about loading the directory. It would be nice to automate this, but it would not be an issue if there were a reasonable number of RTX phones. I have been using these phones for a while including the facility to allow dect roaming between base stations...
  12. Problems with outbound dialing, 3cx gatway skype

    The key might be "user agent not matched" as in the log. Your codecs might mismatch, so check them. You could do a verbose log and that will tell you about the SDP and whether that matches both ends. Kind regards Richard
  13. 3cx doesn't detect T38 media

    It could be that it would be better if the fax software sent UDP packets straight to the BRI interface. Make sure that for both the FAX extension and the BRI gateway that PBX. Do this as follows:- Go the the gateway and on the advanced tab uncheck PBX delivers audio. Check both "Support...
  14. UK based fax over T.38 provider

    Hi, We have customers who have been using T.38 for some time. No problem at all. They also provide suitable ADSL services as well as SIP trunks. Kind regards Richard
  15. No ringback tone dialing from 3CX Phone system to PSTN line

    Re: No ringback tone dialing from 3CX Phone system to PSTN l Hi, I hope firstly that I understand the nature of the problem. I can see two ways to fix this issues- 1 Use a router with VPN to link 3CX to location of PSTN gateway. Routers at both sites would have to be something like a Draytek...
  16. GSM cards for 3CX PBX

    Portech gsm gateway is supported by 3CX. You can buy various size boxes that support 1,2 4 or even more SIMS. Richard
  17. Merge BT phones and 3CX without VOIP contract?

    Hi, I suspect that the PC running 3CX is running a high cpu load. I can assure you that normally do not get anything like that delay. Also using the 3102 needs the correct setup for the UK so that you get the best clarity available. The right line impedance for example. You can google both...
  18. Maintaining calls while moving through the warehouse

    Another thought. There is now a wireless standard 802.11r. The r is for roaming. I don't know of any wi fi phones hard or soft that support this standard. Cisco does with its latest access points. Roaming switch over should take less than 50ms. Richard
  19. sipgate diversion header

    Hi, I tested this provider some time ago and diversion header did not work. The only one in the UK that I have found that works is Voipfone. Kind regards Richard
  20. Maintaining calls while moving through the warehouse

    Hi, I just wanted to back up what Leejor had to say. We have been testing various DECT phones. It is possible for them to roam, unlike wi-fi phones where their ability is limited at best. Proper DECT solutions can be quite expensive, but RTX phones come at a good price and have roaming...
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