Grandstream Networks HT812 Administration Manual page 43

2. Use random SIP/RTP ports (under advanced settings webpage), this setting depends on your network settings. Generally,
if you have multiple IP devices under the same network, it should be set to Yes. If using a public IP address, set this
parameter to No.
3. NAT traversal (under the FXS web page) Set this to Yes when gateway is behind firewall on a private network.
DTMF Methods
The HT812/HT814 support the following DTMF mode:
• DTMF in-audio
• DTMF via RTP (RFC2833)
• DTMF via SIP INFO
Set priority of DTMF methods according to your preference. This setting should be based on your server DTMF setting.
Preferred Vocoder (Codec)
The HT812/HT814 support following voice codecs. On Profile pages, choose the order of your codecs:
• PCMU/A (or G711µ/a)
• G729 A/B
• G723.1
• G726
• iLBC
• OPUS
• G722
Configuring HT812/HT814 Through Voice Prompts
As mentioned previously, The HT812/HT814 have a built-in voice prompt menu for simple device configuration. Please refer
to "Understanding HT812/HT814 Interactive Voice Prompt Response
access its menu.
DHCP MODE
Select voice menu option 01 to enable HT812/HT814 to use DHCP.
STATIC IP MODE
Select voice menu option 01 to enable HT812/HT814 to use STATIC IP mode, then use option 02, 03, 04, 05 to set up IP
address, Subnet Mask, Gateway and DNS server respectively.
PPPOE MODE
Select voice menu option 01 to allow the HT812/HT814 to enable the PPPoE mode. PPPoE Username and Password should be
configured from web GUI.
FIRMWARE SERVER IP ADDRESS
Select voice menu option 13 to configure the IP address of the firmware server.
CONFIGURATION SERVER IP ADDRESS
Menu" for more information about IVR and how to