User manual

107
Line 1
Ports Telf1
Enable T.38 support
Enable or disable T.38 Fax mode support with this
checkbox . You can plug a fax machine into either
phone port to send or receive faxes. Functionality
depends upon FAX support by your VoIP service
provider.
Registration Expire
Timeout
The time period the user would like the registration to be
valid for the Registrar/ Proxy Server.
Registration Retry
Interval
The time interval between re-registration attempts.
Max Digit Length
Sets the maximum number of digits for a phone number.
DSCP for SIP
Diff Serv Code Point (DSCP) for SIP.
DSCP for RTP
Diff Serv Code Point (DSCP) for RTP.
Dtmf Relay setting Set the special use of RTP packets to transmit digit
events.
Hook Flash Relay setting
When you integrate Voice over IP (VoIP) technologies to
legacy private branch exchange (PBX) and public
switched telephone networks (PSTNs), there is
sometimes a need to pass a type of signaling known as
'hookflash'. A hookflash is a brief interruption in the loop
current on loopstart trunks that the attached system
does not interpret as a call disconnect.
Once the PBX or PSTN senses the hookflash, it generally
puts the current call on hold and provides a secondary
dial tone or access to other features such as transfer or
call waiting access.
A hookflash is done by momentarily pressing down the
cradle on a telephone. Some telephone handsets have a
button called 'flash' or 'recall' that sends a 'timed loop
break', or 'calibrated flash' which is a hookflash that has
a precise timing.
SIP Transport protocol
Specify if the SIP stack will operate over USP or TCP.
Enable SIP tag matching
(Uncheck for Vonage
Interop).
Since CPE rely on the tags for matching purposes,
implementations which support Replacements MUST
support the SIP specification, which requires tags.