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Server
Gigaset T300 PRO / Gigaset T500 PRO / englisch / A31008-M2212-R102-3-7619 / admin_administration.fm / 19.03.2012
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By being enabled for the network segment, the Gigaset T300 PRO / Gigaset T500 PRO
becomes an NTP server too, from which the phones and client computers connected in this
segment take their system time. This option must, however, be activated on the end devices.
Network
This tab provides an overview of the configurations entered during initial installation,
which can be modified here.
SIP settings
SIP (Session Initiation Protocol) is an open network protocol standard for establishing
connections between two or more SIP-capable VoIP end devices. A key SIP property is the
usage of RTP (Realtime Transport Protocol). RTP "packets" the connection's audio and
video data and sends it via UDP (User Datagram Protocol). As port assignment with UDP
is dynamic, routers using NAT will not be able to assign the data packets to the
corresponding ports. If the server is in a network that uses NAT, e.g., via a router, you must
activate the NAT checkbox.
NAT (Network Address Translation) "masks" the individual internal IP addresses "to the
outside" (to the Internet) using one or more public IP addresses. Port masquerading, as
this is known, is also frequently used to replace the port numbers during data transfer.
The NAT settings must be considered when the Gigaset T300 PRO / Gigaset T500 PRO
server is linked via a provider connection and/or external phones are connected (see also
The interaction of Gigaset T300 PRO / Gigaset T500 PRO and NAT is very dependent on
the network architecture, and the settings should not be changed on a functioning
system (telephony to be precise). Conversely, the cause of non-functioning connections
may be found in the interaction of firewalls, routers and server.
A more in-depth explanation about NAT and its interaction with VoIP can be found at:
www.voip-info.org
Caution
After modifying the time settings, the web server must be restarted!
Please note
After making changes in this tab, it is necessary to restart the PBX.
Important
The following ports in the firewall must be enabled for using external end devices:
u
5060 UDP and 10000-20000 UDP for SIP clients
u
4569 UDP for IAX-Clients