Problems making/receiving calls
MINOR Closed VoIP and SIMs
STATUS
Closed
CREATED
Jun 22, 08:07 AM (13¾ years ago)
AFFECTED
VoIP and SIMs
STARTED
Jun 21, 06:00 PM (13¾ years ago)
CLOSED
Jun 22, 10:13 AM (13¾ years ago)
REFERENCE
297 / AA297
INFORMATION
  • INITIAL
    13¾ years ago by Adrian

    We have changed a number of lines to the new call server. This should be seamless but it seems that it is not the case for all of the lines. Support can change you back if needed but the issues need to be addressed anyway in the longer term.

    The main issues are :-

    1. Configuration. Customers using <number>.call.me.uk as the registrar will have correctly changed to the new IP 81.187.30.119. However, some customers have 81.187.30.110 or a.speechless.aaisp.net.uk hard coded and have not changed. You can still register and route calls via the old call server and calls should reach you as normal, however we'll be contacting people still on the old server to update config.

    2. Registration firewalls. Customers correctly registering on the new server may have firewalls not allowing replies. The reply comes from port 2002. You really need to allow all UDP from our call servers to your SIP devices.

    3. Invite firewalls. Incoming calls now come from 81.187.30.119 but many people have locked the firewall to just one IP. We have 81.187.30.110-119 for our call servers, and have used 110, 111 and 112 in the past. Please allow UDP SIP from all of our call server addresses.

    4. SIP forwarding. Where we forward calls to you by SIP, the call comes from 81.187.30.119 now. Some people have firewalls allowing this but configurations that are not accepting the call from the new call server. The config needs to allow calls from any of our call servers.

    5. RTP firewall. The actual audio traffic is carrier by UDP. It is often symmetric so does not have firewall issues. The new call server negotiates end to end RTP so the audio can come from anywhere on the internet. We suggest allowing all UDP to you SIP devices.

    Anyone with these issues this morning can have the call server changes back to the old server. However, configuration and firewalling issues need to be solved in the longer term and some issues (like SIP forwarding) will remain for calls that start on the new server.

    In order to scale up our operation and make it more robust and reliable we have to be able to set up multiple servers and have calls reach you from more than one IP address.

  • UPDATE
    13¾ years ago

    Calls to numbers in international format (starting +) were failing - this has been fixed now.

  • RESOLUTION
    13¾ years ago by Adrian

    This seems to have gone more seamlessly than I expected. Just a few people with issues so far.

    Any issues - please do contact support.

  • Closed