Grandstream Networks UCM6510 User Manual page 184

Outbound Proxy
DID Mode
DTMF Mode
Enable Qualify
Qualify Timeout
Qualify Frequency
Maximum Number of Call
Lines
Fax Mode
SRTP
CC Settings
Enable CC
CC Max Agents
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 UCM6510 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 limite.
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 UI->PBX->Internal Options->Fax/T.38.
Enable SRTP for the VoIP trunk. The default setting is "No".
If enabled, the system will automatically alert the user when a called party
is available, given that a previous call to that party failed for some reason.
Configure the maximum number of CCSS agents which may be allocated
for this channel. In other words, this number serves as the maximum
number of CC requests this channel is allowed to make. The minimum
value is 1.
UCM6510 IP PBX User Manual
P a g e | 183