2N Wireless 3G router 2N EasyRoute_old design - User manual, 1571 v1.06 - Manual (Page 45)

Table of Programmable Parameters 3.2
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SIP > Basic ERF
Set login data for VoIP providers, codec priorities and other VoIP parameters in
this menu.
Enable
Enable the use of the SIP account and VoIP routing.
User agent
Set the name to be displayed to the called subscriber.
Local port
Set the port to be used for SIP communication by 2N ® EasyRoute.
RTP port base
Set the port for RTP stream sending.
RTP port count
Set the range of the RTP ports to be used. Range 1-10.
Register expire
When the preset time interval elapses, the gateway sends a new registration
packet to the SIP proxy as defined in the SIP > Account menu. Range 30s-3600s.
Keepalive
When the preset time interval elapses, the gateway sends a KeepAlive packet to
restore the gateway path storing time in the NAT router tables.
Range 0-100000ms.