Defining Local Communication Ports For Voip - Siemens Gigaset S675 IP Manual

Setting the phone with the PC
Preferred Refer To
Define the protocol (the contents of the "Refer To" information) that should be
used with preference when forwarding calls:
Target's contact info
This protocol is recommended for "closed" networks (internal company and
business networks).
Original URL
This protocol is recommended when the base station is connected to the
Internet via a router with NAT.
Automatic Refer To
If you select Yes, the base station will automatically attempt to determine the
best protocol.
If the base station cannot determine the best protocol, it will use the protocol
defined in
¤
Select
Please note
For information on how to forward a call when you deactivate both
key to initiate call transfer with the SIP Refer method.
£
Page

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) signaling 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.
¤
Open the following Web page:
178
Preferred Refer To.
Set to save your settings.
64.
and
Transfer Call by
¢
Settings Telephony
Use the R
On-Hook,
¢
Advanced Settings.