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COMpact 5000/R - Firmware V6.6A - Installation, Operation and Configuration V05 03/2016
Settings
VoIP
VoIP Provider Settings
Interval for NAT Keep-Alive
enabled
After the time specified here has passed, NAT Keep-Alive packets are sent to the Firewall to
maintain the NAT mapping.
Note:
Some VoIP providers block accounts if the
Interval for NAT Keep-
Alive
is too short. As a rule, this is reported with error message 503 during
SIP registration. If you encounter this problem, we recommend you set a
higher value (e.g. 180).
Outbound proxy
The outbound proxy is an intermediate server that processes all VoIP requests and connec-
tions going to the provider (except for registration).
automatically
: The PBX automatically determines an outbound proxy.
Manual
Port
: The outbound proxy is a fixed default setting. Enter this data as
an IP address or a URL.
Note:
The
Overviews > Ports
page shows an overview of the PBX ports
(incoming and outgoing).
SIP port (1 to 65535)
The SIP port on the PBX is used both as an incoming port and an outgoing port (i.e. for commu-
nications with the VoIP provider).
Notes:
A different SIP port must be used for each VoIP provider.
The SIP port for a VoIP provider cannot be the same as the
SIP port of the
internal VoIP registrar
or the
SIPS port of the internal VoIP registrar
.
The
Overviews > Ports
page shows an overview of the PBX ports (incoming
and outgoing).
Caution:
Each time a port is opened on the NAT router, this creates
a potential source of danger.
•
It is essential you put additional protective measures in place.