Grandstream Networks UCM6510 IP PBX User Manual page 102

Last Name
Email Address
Language
SIP Settings
NAT
Can Reinvite
DTMF Mode
Insecure
Enable Keep-alive
Keep-alive Frequency
Firmware Version 1.0.1.12
Configure the last name of the user. The last name can contain characters,
letters, digits and _.
Fill in the Email address for the user. Voicemail will be sent to this Email
address.
Select the voice prompt language to be used for this extension. The default
setting is "Default" which is the selected voice prompt language under web
GUI->PBX->Internal Options->Language. The dropdown list shows all
the current available voice prompt languages on the UCM6510. To add
more languages in the list, please download voice prompt package by
selecting "Check Prompt
Options->Language.
Use NAT when the UCM6510 is on a public IP communicating with devices
hidden behind NAT (e.g., broadband router). If there is one-way audio
issue, usually it's related to NAT configuration or Firewall's support of SIP
and RTP ports. The default setting is enabled.
By default, the UCM6510 will route the media steams from SIP endpoints
through itself. If enabled, the PBX will attempt to negotiate with the
endpoints to route the media stream directly. It is not always possible for
the UCM6510 to negotiate endpoint-to-endpoint media routing. The default
setting is "No".
Select DTMF mode for the user to send DTMF. The default setting is
"RFC2833". If "Info" is selected, SIP INFO message will be used. If
"Inband" is selected, 64-kbit PCMU and PCMA are required. When "Auto"
is selected, RFC2833 will be used if offered, otherwise "Inband" will be
used.

Port: Allow peers matching by IP address without matching port
number.

Very: Allow peers matching by IP address without matching port
number. Also, authentication of incoming INVITE messages is not
required.

No: Normal IP-based peers matching and authentication of incoming
INVITE.
The default setting is "Port".
If enabled, empty SDP packet will be sent to the SIP server periodically to
keep the NAT port open. The default setting is "Yes".
Configure the Keep-alive interval (in seconds) to check if the host is up.
The default setting is 60 seconds.
UCM6510 IP PBX User Manual
List" under web GUI->PBX->Internal
Page 100 of 277