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Unread 04-20-2009, 05:39 PM   #7
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In Linksys ATAs the RTP port range cannot be set per account. According the manual; "The RTP Port Min and RTP Port Max parameters should define a range that contains at least 4 even number ports, such as 100 106." The default range is 16384 to 16482.

While stun is a good choice in many instances, it is not always needed and in fact will add a small degree of unreliability to the phone service. If you use stun you may expect your phone service to fail if the stun server fails. To operate without stun do the following:

1. Forward the SIP ports and the RTP port range.
2. Set STUN Enable: no
3. Set NAT_Keep_Alive_Enable: no
4. In order for the ATA/phone to know it's public IP address, make sure the ATA/phone is registered with at least one SIP registrar, or enter your public IP address into the appropriate setting in the ATA (in Linksys ATAs this setting is EXT_IP).
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