User's Manual

SME VoIP System Guide, Version 1.5
Proprietary and Confidential
Chapter: SME VoIP Administration Interface
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9.4.4 NAT Settings
We define some options available when NAT aware routers are enabled in the network.
Parameter
Description
Enable RPORT
Define whether RPORT should be used in SIP messages. Enabled by setting to Yes
and disable by choosing No
Permitted values: Yes, No. This option is disabled by default.
Keep alive time
This defines the frequency of how keep-alives are sent to maintain NAT bindings.
Permitted values: Positive integer default is 90, unit is in seconds
9.4.5 SIP/RTP Settings
These are some definitions of SIP/RTP Server settings:
Parameter
Description
Local SIP port
SIP server port number reserved for a specific customer by the network operator.
Port used for first user agent (UA) instance. Succeeding UA's will get succeeding
ports.
Permitted values: Port number default 5060.
SIP ToS/QoS
Priority of call control signalling traffic based on both IP Layers of Type of Service
(ToS) byte. ToS is referred to as Quality of Service (QoS) in packet based
networks.
Permitted values: Positive integer default is 104
RTP port
Usually the first RTP port to use for RTP audio streaming.
Permitted values: Port number default 50004 (depending on the setup).
RTP port range
The number of ports that can be used for RTP audio streaming.
Permitted values: Positive integers, default is 20
RTP TOS/QoS
Priority of RTP traffic based on the IP layer ToS (Type of Service) byte. ToS is
referred to as Quality of Service (QoS) in packet based networks.
See RFC 1349 for details. “cost bit" is not supported.
o Bit 7..5 defines precedence.
o Bit 4..2 defines Type of Service.
o Bit 1..0 are ignored.
Setting all three of bit 4..2 will be ignored.
Permitted values: Positive integer default is 160