Important Settings; Nat Settings - Grandstream Networks HT813 Administration Manual

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PSTN Idle Wait
Timeout between
Outgoing Calls
Channel Dialing
DTMF Digit Length
(ms)
DTMF Dial Pause
(ms)
First Digit Timeout
(sec)
Inter-Digit Timeout
Wait for Dial Tone
Stage Method (1/2)
Min Delay Before
Dial PSTN Number

Important Settings

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.
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Used to customize timeout value between PSTN outgoing calls. Range is 0-10
seconds. Default is 4 seconds.
Digit length and Dial Pause are port digit dialing configurations; FXO needs to dial out
digits for VoIP to PSTN 1 stage calls, and unconditional call forward to PSTN, and route
to PSTN. Digit Length is the play time for each digit.
Note: In order to receive the caller ID information, the delay should be set to a value
larger than the delay required to complete the PSTN caller ID delivery.
Dial pause is the time between 2 digits for the same scenario as explained above.
Used for PSTN to VoIP calls. PSTN users need to enter the FIRST digit within the first
digit timeout period. Otherwise the call will be dropped.
When dialing from the PSTN to VoIP, subsequent digits have to be input within the
period of inter-digit timeout. Otherwise the dial plan thinks it is the end of the digit input.
Wait for Dial tone is used for one stage VoIP to PSTN calls. If set to Yes, the device
will first obtain a PSTN line and a dial tone from a central office. After obtaining the
dial tone, the digits dialed will be sent to the central office.
This configuration is applicable for VoIP to PSTN calls and indicates one or two stage
dialing methods.
The time to wait before HT813 initiates the call via PSTN line.
Default 500ms, range is from 50 to 65000ms.
HT813 Administration Guide
Version 1.0.1.2
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