User's Manual

SME VoIP System Guide, Version 1.5
Proprietary and Confidential
Chapter: SME VoIP Administration Interface
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9.3 Servers
In this section, we describe the different parameters available in the Servers configurations menu.
Parameter
Description
NAT Adaption
To ensure all SIP messages goes directly to the NAT gateway in the SIP aware
router. NAT Adaption option should be “No” or otherwise choose “Yes”
Possible value(s): Yes, No
Registrar
SIP Server proxy DNS or IP address
Permitted value(s): AAA.BBB.CCC.DDD:<Port-Number> or <URL>:<Port-###>
Note: Specifying the Port Number is optional.
Outbound Proxy
This is a Session Border Controller DNS or IP address (OR SIP server outbound
proxy address)
Set the Outbound proxy to the address and port of private NAT gateway so that
SIP messages sent via the NAT gateway.
Permitted value(s): AAA.BBB.CCC.DDD or <URL> or <URL>:<Port-###>
Examples: “192.168.0.1”, “192.168.0.1:5062”,
“nat.company.com” and “sip:[e-mail]:5065”.
Re-registration
time
The window period (in seconds) when base stations SIP registers with SIP server.
Permitted value(s): Positive integer
Keep Alive
This directive defines the window period (30 secs.) to keep opening the port of
relevant NAT-aware router(s), etc.
Valid Input(s): Enable, Disable
DTMF Signalling
Conversion of decimal digits (and '*' and '#') into sounds that share similar
characteristics with voice to easily traverse networks designed for voice
Valid Option(s)
In band: Meta-data (e.g.: tone digits) and control information sent in the same
voice band, using the same VoIP codec as the human voice (e.g. G.711, G.729,
etc.)
SIP INFO: Carries application level data along SIP signalling path (e.g.: Carries
DTMF digits generated during SIP session OR sending of DTMF tones via data
packets in the same internet layer as the Voice Stream, etc.).
RFC 2833: DTMF handling for gateways, end systems and RTP trunks (e.g.:
Sending DTMF tones via data packets in different internet layer as the voice
stream)
Both: Enables SIP INFO and RFC 2833 modes.
Codec Priority
Defines the codec priority that base stations uses for audio compression and
transmission.
Possible Option(s): PCMU, PCMA, iLBC.