GRANDSTREAM HT812 Analog FXS IP Gateway 2 Port + NAT Router User Guide

Priority Header  

If "Yes", E.911 INVITE message includes the "Priority" header with the value "emergency"  

Profiles Pages Definitions  

Profiles (1,2)  

Activates / Deactivates the accounts. The FXS port configuration will not change if disabled, although the port will  

not be operational, in this state, there will be no dial tone when picking up the analog phone and making/receiving  

calls will not be possible.  

Profile Active  

Configures SIP server IP address (Supports both IPv4 and IPv6 addresses) or domain name provided by VoIP service  

provider. (For example: sip.mycompany.com, IPv4:192.168.5.170, or IPv6: fe80::20b:82ff:fe75:211d). This is the  

primary SIP server used to send/receive SIP messages from/to HT81x.  

Primary SIP  

Server  

Defines failover SIP server IP address (Supports both IPv4 and IPv6 addresses) or domain name provided by VoIP  

service provider. (For example: sip.mycompany.com, IPv4:192.168.5.170, or IPv6 fe80::20b:82ff:fe75:211d:). This  

server will be used if primary SIP server becomes unavailable.  

Failover SIP  

Server  

Prefer Primary  

SIP Server  

Selects to prefer primary SIP server. The account will register to primary Server if registration with Failover server  

expires. Default is No.  

Specifies IP address (Supports both IPv4 and IPv6 addresses) or domain name of outbound Proxy, or media gateway,  

or session border controller. (For example: proxy.myprovider.com, IPv4: 192.168.5.170, or IPv6:  

Outbound Proxy  

fe80::20b:82ff:fe75:211d). It’s Used by HT818 for firewall or NAT penetration in different network environments. If  

symmetric NAT is detected, STUN will not work and only outbound proxy can correct the problem  

Configures the backup outbound proxy to be used when the “Outbound Proxy” registration fails. (For example:  

proxy.myprovider.com, or IP address, if any: IPv4: 192.168.5.170/ IPv6: fe80::20b:82ff:fe75:211d). By default, this  

field is left empty.  

Backup  

Outbound Proxy  

Prefer Primary  

Outbound Proxy  

If the user configures this option to “Yes”, when the registration expires, the device will re-register via primary  

outbound proxy. By default, this option is disabled.  

From Domain  

allows users to add the actual domain name, it will override the from header.This is an optional configuration.  

Configures the HT81x to collect SIP server address from DHCP option 120. Default is No.  

Allow DHCP  

Option 120  

(override SIP  

Server)  

Selects transport protocol for SIP packets; UDP or TCP or TLS. Please make sure your SIP Server or network  

environment supports SIP over the selected transport method. Default is UDP.  

SIP transport  

SIP URI Scheme  

When Using TLS  

Specifies if “sip” or “sips” will be used when TLS/TCP is selected for SIP Transport. The default setting is “sips”.  

Use Actual  

Ephemeral Port  

in Contact with  

TCP/TLS  

Controls the port information in the Via header and Contact header. If set to “No”, these port numbers will use the  

permanent listening port on the phone. Otherwise, they will use the ephemeral port for the connection. Default is No.  

Indicates type of NAT for each account. This parameter configures whether the NAT traversal mechanism is activated.  

Users could select the mechanism from No, Keep-alive, STUN, UPnP.  

NAT Traversal  

Default setting is No.  

Selects DNS mode to use for the client to look up server. One mode can be chosen.  

A Record (Default): resolves IP Address of target according to domain name.  

SRV: DNS SRV resource records indicate how to find services for various protocols.  

NAPTR/SRV: Naming Authority Pointer according to RFC 2915.  

DNS Mode  

Use Configured IP: If the SIP server is configured as domain name, device will not send DNS queries, but will use  

“Primary IP” or “Backup IP” to send SIP message if at least one of them is not empty. It will try to use “Primary IP”  

first, after 3 tries without any response, it will switch to “Backup IP 1”, then “Backup IP 2”, and then it will switch  

back to “Primary IP” after 3 retries.  

When the HT81x is registered using the second SRV record, making an outbound call, it will try the second SRV  

DNS SRV use  

Registered IP  

(registered IP) first. By default, this option is disabled and the DNS SRV will use first SRV instead of the registered  

IP.  

Configure the preferred IP mode when DNS Mode is SRV or NAPTR/SRV.  

• Default SIP request will always be sent to the address with the top priority based on the SRV query result, even if  

this address is different from the registered IP address.  

DNS SRV  

• Saved one until DNS TTL SIP request will always be sent to the registered IP address until DNS TTL expires or  

registered IP address is unreachable  

Failover Mode  

• Saved on until no response SIP request will always be sent to the registered IP address only until registered IP  

address is unreachable.  

When the primary SBC is up, device will send SIP requests to the primary SBC. If at any point device fails over to the  

secondary SBC, the SIP requests will stay on the failover SBC for the duration of the failback timer. When the timer  

expires, device will send SIP requests to the primary SBC, (in minutes. Default is 60 minutes, max 45 days).  

Failback Timer  

Register before  

DNS SRV  

This feature is used to control whether the device need to initiate a new registration request (following existing DNS  

SRV fail-over mode) first and then direct the non-registration SIP request (INVITE) to the new successfully registered  

server or not.  

Failover  

TEL URI  

Indicates E.164 number in “From” header by adding “User=Phone” parameter or using “Tel:” in SIP packets, if the  

HT81x has an assigned PSTN Number.  

Disabled: Use “SIP User ID” information in the Request-Line and “From” header.  

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General	Details
Name	GRANDSTREAM HT812 Analog FXS IP Gateway 2 Port + NAT Router User Guide
Make	GRANDSTREAM
Language	English
Filetype	PDF (Download)
File size	MB

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