Registering Sip Account Failed; The Handset Won't Register; Outgoing Calls Successful, Incoming Calls Sometimes - Siemens C470IP Manual

Registering SIP account failed

• Check if the network settings are correct (try to connect to your BASE as explained in STEP 2.
• Check the username and the password (space-sensitive en caps-sensitive)!
• Check if you have more than 1 SIP device on your network, if you have doubts try changing the local SIP port to another port than 5060.
o For this you need to go back to the previous DTMF-page and change the port where the text says "SIP-port".

The handset won't register

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• Reset your BASE and handset and let the handset find your base again, whilst holding the button on your BASE station pressed during
some seconds and after these few seconds letting go of course (it's possible you will have to try this more than one time).

Outgoing calls successful, incoming calls sometimes

• Make sure that you don't have a double NAT (meaning a router behind a router).
• Decrease the NAT keepalive to less than 120 seconds.
• For this you need to go back to STEP 9 and change the number in the box where the text says "NAT refresh time" to less than 120
seconds (this has been standard set at 20 sec.).
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