Grandstream Networks UCM6200 Series User Manual page 157

Send PAI Header
Outbound Proxy Support
Outbound Proxy
DID Mode
DTMF Mode
Enable Qualify
Qualify Timeout
Qualify Frequency
Maximum Number of Call
Lines
Fax Mode
Firmware Version 1.0.0.1
"Send PPI Header" and "Send PAI Header" cannot be enabled at the
same time. Only one of the two headers is allowed to be contained in the
SIP INVITE message.
If enabled, the SIP INVITE message sent to the trunk will contain PAI
(P-Asserted-Identity) header. The default setting is "No".
Note:
"Send PPI Header" and "Send PAI Header" cannot be enabled at the
same time. Only one of the two headers is allowed to be contained in the
SIP INVITE message.
Select to enable outbound proxy in this trunk. The default setting is "No".
When outbound proxy support is enabled, enter the IP address or URL of
the outbound proxy.
Configure where to get the destination ID of an incoming SIP call, from
SIP Request-line or To-header. The default is set to "Request-line".
Configure the default DTMF mode when sending DTMF on this trunk.

Default: The global setting of DTMF mode will be used. The global
setting for DTMF Mode setting is under web UI->PBX->SIP
Settings->ToS.

RFC2833: Send DTMF using RFC2833.

Info: Send DTMF using SIP INFO message.

Inband: Send DTMF using inband audio. This requires 64 bit codec,
i.e., PCMU and PCMA.

Auto: Send DTMF using RFC2833 if offered. Otherwise, inband will
be used.
If enabled, the UCM6200 will regularly send SIP OPTIONS to the device
to check if the device is still online. The default setting is "No".
When "Enable Qualify" option is set to "Yes", configure the timeout (in ms)
for the Qualify SIP message. If no response is received within the timeout,
the device is considered offline. The default setting is 1000ms.
When "Enable Qualify" option is set to "Yes", configure the interval (in
seconds) of the SIP OPTIONS message sent to the device to check if the
device is still online. The default setting is 60 seconds.
The maximum number of concurrent calls using the trunk. The default
settings 0, which means no limit.
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
UCM6200 Series IP PBX User Manual Page 156 of 320