Gigaset A580 IP User Manual page 136

RTP port Specify a range of port numbers that are to be used as RTP ports. This range must
be used in the LAN (router) for the phone.
Enter the lowest port number in the left-hand field and the highest number in the
right-hand field (numbers between 1024 and 55000).
Size of the port number range:
The difference between the port numbers must be at least 6 if you permit two
simultaneous VoIP calls on your phone. The difference must be at least 4 if you only
permit one VoIP call (
The lower of the port numbers in the range (in the left-hand field) must be an even
number. If you enter an odd number, the next lowest even number will be selected
automatically (e.g. if you enter 5003, then 5002 is set automatically).
The default port number for voice transmission is 5004.
Use random ports = Yes
SIP port Enter the port number range from which the SIP port is to be dialled.
Enter the lowest port number in the port number range in the left-hand field and
the highest number in the right-hand field (numbers between 1024 and 49152).
This port number range must not overlap with the range specified for RTP port.
The default range is 5060 to 5076.
RTP port Specify a range of port numbers from which the RTP ports are to be dialled.
Enter the lowest port number in the port number range in the left-hand field and
the highest number in the right-hand field.
The default range is 5004 to 5020.
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Now select Set to save your settings.
Web configurator – Setting the phone using a PC
¢
option Allow 1 VoIP call only on Page 122).
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