Zoom ADSL X6v - Manual (Page 55)

RTP Protocol Parameters
This page displays the VoIP system's Real-time Transport Protocol
jitter buffer parameters. The page is informational only.
SIP Parameters
1 Select the SIP (Session Initiation Protocol) Parameters menu
to display the SIP Protocol Parameters configuration page.
2 Change the SIP Local Port setting only if you have a conflict –
for example, if you have multiple VoIP devices on your Local
Area Network.
If this is the case, change the port in even-numbered
increments: 5062, 5064, etc.
3 Click Save These Settings.
55 Chapter 4: Setting Up VoIP Service