Aastra Telecom 57I C53I manual Sip nat rtp port

Configuration Parameters

Operational, Basic, and Advanced Parameters

Parameter –	IP Phone UI	Options->SIP Settings->RTP Port Base
sip nat rtp port	Aastra Web UI	Advanced Settings->Network->
		Advanced Network Settings
RTP Port Base	Configuration Files	aastra.cfg, <mac>.cfg
(in IP Phone UI)
NAT RTP Port
(in Web UI)
Description	Indicates the port through which the RTP packets are sent. This value
	must specify the beginning of the RTP port range on the gateway or
	router.
	The RTP port is used for sending DTMF tones and for the audio stream.
	Your network administrator may close some ports for security reasons.
	You may want to use this parameter to send RTP data using a different
	port.
Format	Integer
Default Value	51720
Range	Not Applicable
Example	sip nat rtp port: 51730

Appendix A

41-001160-00, Rev 01 Release 2.0 A-23