I have a remote user, on our FreePBX system. They recently bought a new modem, and are no longer to make/receive calls from their remote phone. The only thing that changed, was the new modem. The model number is a Motorola MG7315.
Symptoms:
- The phone registers, but the Asterisk console reports that there are serious network troubles as soon as it registers.
- It stays registers for a brief time, and then becomes unreachable. (visible from the Asterisk console)
- Whenever the user tries to make a phone call, the phone becomes unreachable. (visible from the Asterisk console)
Troubleshooting steps so far:
- In the settings of the modem, there is an option to turn off SIP ALG, which I already did. No change.
- There is an option to add the phone to a DMZ on the modem. I've done this also. No help
Any ideas for further troubleshooting?