Nat Settings - Grandstream Networks HT801 Administration Manual

Enable Hook Flash Enables the FLASH button to be used for terminating calls. Default is Yes.
Hook Flash Timing Defines the time period when the cradle is pressed (Hook Flash) to simulate FLASH.
To prevent unwanted activation of the Flash/Hold and automatic phone ring-back, adjust
this time value. HT801 supports a range from 40 to 2000 ms. Default values are 300
minimum and 1100 maximum.
On Hook Timing Specifies the on-hook time for an on-hook event to be validated. HT801 supports a
range from 40 to 2000 ms. Default value is 400.
Gain Adjusts the voice path volume.
• Rx is a gain level for signals transmitted by FXS
• Tx is a gain level for signals received by FXS.
Default = 0dB for both parameters. Loudest volume: +6dB Lowest volume: -6dB.
User can adjust volume of call using the Rx gain level parameter and the Tx gain level
parameter located on the FXS port configuration page.
If call volume is too low when using the FXS port (ie. the ATA is at user site), adjust
volume using the Rx gain level parameter under the FXS port configuration page.
If voice volume is too low at the other end, user may increase the far end volume using
the Tx gain level parameter under the FXS port configuration PAGE.
Disable Line Echo Disables the LEC will per call base. Recommended for FAX/Data calls. Default is No.
Canceller
Disable Network Disables the NEC will per call base. Recommended for FAX/Data calls. Default is No.
Echo Suppressor
Outgoing Call Defines the call duration limit for the outgoing calls, Default is 0 (No limit).
Duration Limit
Ring Frequency Configures ringing frequency for your phone. 15-60 Hz, Default is 20 Hz.
Ring tones Configures the ring tone cadence preferences. User has 10 choices. The
configuration, completed in Distinctive Ring Tones block in the same page, applies to
ring tones cadences configured here.

NAT Settings

If you plan to keep the handy tone within a private network behind a firewall, we recommend using STUN
Server. The following three settings are useful in the STUN Server scenario:
1. STUN Server (under advanced settings webpage) enter a STUN server IP (or FQDN) that you may
have, or look up a free public STUN server on the internet and enter it on this field. If using public IP,
keep this field blank.
HT801 Administration Guide
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