Question 1

Does this have a built in firewall?

Accepted Answer

No

Question 2

Can the ethernet ports be used in bridge mode instead of nat mode? if so can they bridge traffic at a full 1gbps?

Accepted Answer

I don't know why you would want to set it up in bridge mode, except for maybe a 1ms reduction in latency for SIP calls, while slowing down your main networks traffic, via a new choke point. Also the reason you can't use this in bridge mode is it would require it's own IP Address, and your router would need one too, most ISPs won't let you use 2 IPs from the same connection. Now a bridge mode where it uses the same IP from your ISP is possible, but that would still be using some NAT for it's self and your router. If you attach this straight to your router and  main network, bypassing this ATAs NAT firewall, you wouldn't be increasing latency by any noticeable amount, nor adding another choke point, and you won't be adding to a complicated mess of cables. If you just run an Ethernet cable from your routers LAN port to the Internet port on this, and it should work as long as you have its IP Configuration setting to be DHCP or Automatic, which should be the default. You may need to forward some ports in your router though, but the service provider your using should tell you if you need to and how to set it up and what to enter in.

By the way I do not own one of these ATAs but have done a very high level of research on these types of ATAs, and have been working on Small Business/Large Scale Home IT networking for the past 4-6 years.

Question 3

Does this device work with fax machines using itu-t super g3?

Accepted Answer

Yes, the Grandstream HT818 supports fax machines using ITU-T Super G3 protocol. The device is designed to support T.38 fax relay, which is an industry-standard protocol for sending faxes over IP networks.

Question 4

Can this unit power the rj11 fxs ports to power analog phones?

Accepted Answer

The data sheet lists a Ring Equivalence Number (REN) of 2 so it should be able to ring up to 2 analog phones simultaneously.

ASIN	B07B6TL7N6
Antenna Location	VoIP Communications
Antenna Type	Internal
Best Sellers Rank	#112,491 in Electronics ( See Top 100 in Electronics ) #16 in VoIP Routers
Brand	Grandstream
Built-In Media	1
Color	Black
Compatible Devices	Personal computer, laptop
Connectivity Protocol	Ethernet, Wi-Fi, TR069
Connectivity Technology	Ethernet, Wi-Fi
Control Method	App
Customer Reviews	4.7 4.7 out of 5 stars (89)
Data Transfer Rate	1000 Megabits Per Second
Frequency Band Class	Dual-Band
Has Internet Connectivity	Yes
Is Electric	Yes
Is Modem Compatible	No
Item Weight	500 Grams
LAN Port Bandwidth	1000 Mbps
Manufacturer	Grandstream
Maximum Upstream Data Transfer Rate	1000 Megabits Per Second
Mfr Part Number	HT818
Model Name	HT818
Model Number	HT818
Number of Antennas	1
Number of Ports	8
Operating System	RouterOS
Other Special Features of the Product	WPS
Router Network Type	Dual Band
Security Protocol	WPS
UPC	694727370241 753459298497
Voltage	110 Volts, 220 Volts
Warranty Description	1
Wi-Fi Generation	Wi-Fi 4
Wireless Compability	802.11g

Grandstream Grandstream Powerful 8-Port FXS Gateway with Gigabit NAT Router (HT818)

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