Installation Instructions

87
Configuring the system on the DECT Manager
Gigaset N720 DECT IP Multicell System / engbt / A31008-M2314-L101-6-7619 / web-conf.fm / 29.08.2016
Version 2, 06.08.2010
Defining local communication ports (listen ports) for VoIP
This setting only has to be changed if the port numbers are already being used by other
subscribers on the LAN. You can then specify other fixed port numbers for the SIP and RTP
port or ranges of numbers for the SIP port.
The following communication ports are used for VoIP telephony:
u SIP port
The communication port via which the phone receives (SIP) signalling data. The
default standard port number is set to 5060 for SIP signalling. You can use values
between 5060 and 6000.
If several VoIP phones are operated on the same router with NAT, it makes sense to use
randomly selected ports. 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 intended) phone.
¤ Activate Use random ports for SIP and specify a number range for SIP port from
which the ports are to be chosen.
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. The
system uses additional ports for the base station connections (32 ports per DECT
module), based on a specified base port. Default setting for the base port: 5004.
The RTP port range calculated for the DECT modules is displayed on the Own Base
Station Data page (
£ page 68).
Saving settings
¤ Click on Set to save your settings on the page.
Please note
Settings for the R key are only possible if
– The R key has not been activated for call transfer (
£ page 86) and
– SIP Info has been activated (
£ page 84).