Defining Local Communication Ports For Voip - Siemens Gigaset A580 IP User Manual

Web configurator – Setting the phone using a PC

Defining local communication ports for VoIP

Specify which local communication ports (port numbers) the telephone is to
use for VoIP telephony. The ports must not be used by any other subscriber in
the LAN.
The following communication ports are used for VoIP telephony:
u
SIP port
Communication port via which the phone receives (SIP) signalling data
u
RTP port
Two consecutive RTP ports (consecutive port numbers) are required for each
VoiP connection. Voice data is received via one port and control data via the
other.
You can set port numbers or port number areas for SIP and RTP ports, or set
your telephone so that it can use any number of free ports from a predefined
range of port numbers.
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Open the following Web page:
Area Listen ports for VoIP connections
Use random ports
Click No
fields.
port
Select Yes, if you do not want the phone to use fixed ports for
port, but rather to use any free ports from predefined ranges of port numbers.
The use of random ports makes sense if you want several phones to be oper-
ated on the same router with NAT. The phones must then use different ports so
that the router's NAT is only able to forward incoming calls and voice data to
one (the addressed) phone.
Use random ports
Specify the port number for the SIP port. Enter a number between 1024 and
SIP port
49152 in the field.
The default port number for SIP signalling is 5060.
The port number specified must not be in the
142
if you want the phone to use the ports specified in the
= No
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Settings Telephony
RTP port
¢
Advanced Settings.
SIP port and RTP
and
SIP port RTP
number range.