We are currently investigating issues with one of our connectivity providers. It appears ports and packets required for some of our clients sites to communicate with us or being blocked. We hope to have this issue resolved as soon as possible.

UPDATE: 09/03/2010 9am

We still experiencing issues with  connectivity to our SIP Servers.  This seems to affect only few customers within a specific public IP range. Our engineers are in contact with our uplink provider to solve this issue as soon as possible.