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

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: Settings
Area Listen ports for VoIP connections
Use random ports
Click No if you want the phone to use the ports specified in the SIP port and RTP
port fields.
Select Yes, if you do not want the phone to use fixed ports for SIP port and RTP
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 operated 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 = No
SIP port Specify the port number for the SIP port. Enter a number between 1024 and 49152
in the field.
The default port number for SIP signalling is 5060.
The port number specified must not be in the RTP port number range.
Web configurator – Setting the phone using a PC
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Telephony
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Advanced Settings.
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