Grandstream Networks UCM6510 User Manual page 157

Trust Remote Party ID
Send Remote Party ID
Generate In-Band Ringing
Server User Agent
Send Compact SIP Headers
Add "user=phone" to URI
Firmware Version 1.0.0.5
should be larger than RTP Timeout. The default setting is no timeout.
Configure whether the Remote-Party-ID should be trusted. The default
setting is "No".
Configure whether the Remote-Party-ID should be sent or not. The
default setting is "No".
Configure whether the UCM6510 should generate inband ringing or not.
The default setting is "Never".

Yes: The UCM6510 will send 180 Ringing followed by 183 Session
Progress and in-band audio.

No: The UCM6510 will send 180 Ringing if 183 Session Progress
has not been sent yet. If audio path is established already with 183
then send in-band ringing.

Never: Whenever ringing occurs, the UCM6510 will send 180
Ringing as long as 200OK has not been set yet. Inband ringing will
not be generated even the end point device is not working properly.
Configure the user agent string for the UCM6510.
If enabled, compact SIP headers will be sent. The default setting is "No".
If enabled, "user=phone" will be added to URI that contains a valid
phone number. The default setting is "No".
UCM6510 IP PBX User Manual Page 156 of 192