User's Manual

Firmware Version 1.0.0.5
UCM6510 IP PBX User Manual
Page 53 of 192
GUI->PBX->Internal Options->Language.
SIP Settings
NAT
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.
Can Reinvite
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".
DTMF Mode
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.
Insecure
 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".
Enable Keep-alive
If enabled, empty SDP packet will be sent to the SIP server periodically
to keep the NAT port open. The default setting is "Yes".
Keep-alive Frequency
Configure the Keep-alive interval (in seconds) to check if the host is up.
The default setting is 60 seconds.
Auth ID
Configure the authentication ID for the user. If not configured, the
CallerID number
Other Settings
SRTP
Enable SRTP for the call. The default setting is disabled.
Fax Detection
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 UCM6510 web
GUI->PBX->Internal Options->Fax/T.38.