Grandstream Networks UCM6102 User Manual page 90

Can Reinvite
DTMF Mode
Insecure
Enable Keep-alive
Keep-alive Frequency
Auth ID
TEL URI
Other Settings
SRTP
Fax Detection
Firmware Version 1.0.7.11
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 UCM6100 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 UCM6100 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.
Configure the authentication ID for the user. If not configured, the
extension number will be used for authentication.
If the end device/phone has an assigned PSTN telephone number, this
field should be set to "User=Phone". Then a "User=Phone" parameter
will be attached to the Request-Line and TO header in the SIP request to
indicate the E.164 number. If set to "Enable", "Tel:" will be used instead
of "SIP:" in the SIP request. The default setting is disabled.
Enable SRTP for the call. The default setting is disabled.
Enable to detect Fax signal from the user/trunk during the call and send
the received Fax to the Email address configured for this extension. If no
Email address can be found for the user, send the received Fax to the
default Email address in Fax setting page under web GUI->PBX-
>Internal Options->Fax/T.38.
UCM6100 Series IP PBX User Manual Page 88 of 233