Grandstream Networks UCM6204 User Manual

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UCM6200 Series User Manual
NTP Server
Configure the URL or IP address of the NTP server. The SIP end device may
obtain the date and time from the server.
Time Zone
Configure the time zone used on the SIP end device.
Table 24: Global Policy ParametersPhone Settings
Default Call Settings
Dial Plan
Configure the default dial plan rule. For syntax and examples, please refer to
user manual of the SIP devices to be provisioned for more details.
Enable Call Features
When enabled, “Do Not Disturb”, “Call Forward” and other call features can be
used via the local feature code on the phone. Otherwise, the ITSP feature code
will be used.
Use # as Dial Key
If set to “Yes”, pressing the number key “#” will immediately dial out the input
digits.
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”. 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.

Grandstream Networks UCM6204 Specifications

General

Brand	Grandstream Networks
Model	UCM6204
Category	PBX
Language	English