MobiLink IP
CALL CONTROL
MobilinkIP_Usermanual-sw1.2.21_revGen.doc
Page 115 of 188
6.7.2 Settings
Configure the settings for the IP phone exchange that will work with the MobiLink and also
the settings used for NAT traversal..
Select the parameters for the IP phone exchange where the Rohde & Schwarz Topex S.A.
VoIP-2-mobile interface is connected:
IP address
, port, and protocol to be used (SIP or
H323).
Select the parameters for the IP phone exchange
where the Topex MobiLink IP interface is connected:
IP address
, then the port and protocol to be used.
Here you set up the protocol to be used for VoIP and the
corresponding port number. By default the port used for SIP
protocol is the standard
5060
, but the user may change this value if
the SIP PBX operates differently.
Likewise, when you select H323 protocol instead of SIP, the
default port number is
1720
, but you can change this setting.
Traversal of NAT:
The usage of Network Address Translation was imposed by the limited address space of
IPv4.
With NAT, multiple computers on a LAN
could share a single public IP address for
accessing the Internet. But the use of NAT
breaks end-to-end connectivity, which
must be restored.
The techniques for NAT traversal do precisely this, allow communication in client-to-client
networking applications, especially peer-to-peer and Voice-over-IP as in the case of
MobiLink IP. When you need to use NAT traversal, set it to Enabled and fill in the
corresponding public IP address.
