Grandstream UCM6100 User Manual for 1.0.9.25 - Manual (Page 97)

Firmware Version 1.0.9.25 UCM6100 Series IP PBX User Manual Page 96 of 303
Auto Answer by Call-info
If set to "Yes", the phone will automatically turn on the speaker phone to
answer incoming calls after a short reminding beep, based on the SIP
Call-Info header sent from the server/proxy.
The default setting is enabled.
NAT Traversal
Configure which NAT traversal mechanism will be enabled on the
endpoint device.
If set to "STUN" and STUN server is configured, the phone system will
periodically send STUN message to the SUTN server to get the public IP
address of its NAT environment and keep the NAT port open. STUN will
not work if the NAT is symmetric type.
If set to “Keep-alive”, the phone system will send the STUN packets to
maintain the connection that is first established during registration of the
phone. The “Keep-alive” packets will fool the NAT device into keeping the
connection open and this allows the host server to send SIP requests
directly to the registered phone.
If it needs to use OpenVPN to connect host server, it needs to set it to
“VPN”.
If the firewall and the SIP device behind the firewall are both able to use
UPNP, it can be set to “UPNP”. The both parties will negotiate to use
which port to allow SIP through.
The default setting is "Keep-alive".
Use Random Port
Configure whether to allow the endpoint device to use random ports for
both SIP and RTP messages. This is usually necessary when multiple
phones are behind the same full cone NAT. The default setting is "No".
Note: This parameter must be set to "No" for Direct IP Calling to work.
General Settings
Call Progress Tones
Configure call progress tones including ring tone, dial tone, second dial
tone, message waiting tone, ring back tone, call waiting tone, busy tone
and reorder tone using the following syntax:
f1=val, f2=val[, c=on1/ off1[- on2/ off2[- on3/ off3]]];
• Frequencies are in Hz and cadence on and off are in 10ms).
• “on” is the period (in ms) of ringing while “off” is the period of silence.
Up to three cadences are supported.
• Please refer to user manual of the SIP devices to be provisioned for
more details
HEADSET Key Mode
Select “Default Mode” or “Toggle Headset/Speaker” for the Headset key.
Please refer to user manual of the SIP devices to be provisioned for more
details.