UCM6200 Series User Manual
Version 1.0.20.38
Table 33: SIP Extension Configuration Parameters – Media
Use NAT when the UCM6200 is on a public IP communicating with devices
hidden behind NAT (e.g., broadband router). If there is one-way audio
issue, usually it is related to NAT configuration or Firewall’s support of SIP
and RTP ports. The default setting is enabled.
By default, the UCM6200 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 UCM6200 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
“RFC4733”. 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, RFC4733 will be used if offered, otherwise “Inband” will be
used.
If the phone has an assigned PSTN telephone number, this field should
be set to “User=Phone”. “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.
Configure the Alert-Info, when UCM6200 receives an INVITE request, the
Alert-Info header field specifies an alternative ring tone to the UAS.
Enable or disable T.38 UDPTL support.
Enable SRTP for the call. The default setting is disabled.
Select Fax mode. The default setting is “None”.
• None: Disable Fax.
• Fax Detect: Fax signal from the user/trunk during the call can be
detected and the received Fax will be sent to the Email address
configured for this extension. If no Email address can be found for the
user, the Fax will be sent to the default Email address configured in
Fax setting page under Web GUI→Call Features→Fax/T.38.
• Yes – Allow Fax to Email for this extension. Faxes will be sent to the
user’s email address configured in the extension’s Basic Settings.
• No – Do not send any faxes to the user’s email address configured in
the extension’s Basic Settings.
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