I have read around the posts to try and find a solutions to my problem, but have found nothing definitive.
I have SIP configured, can make outbound calls but cannot receive inbound, callers receive busy tone.
It is acting as though port 5060 plus RTP ports from the internet are blocked, but I have not found a way to check that. How can I monitor what is being blocked by the firewall?
I have also tried to ssh to the CPE but the default credentials do not work. What are the ssh credentials.
Firmware build time: Jun 3 2013 / 13:54:38 Firmware version: V200R001B180D20SP00C00
Is there newer firmware for this device?
Cheers