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Grandstream HT-502 Dual Port FXS Gateway


List Price: CDN$ 83.62
Price: CDN$ 52.60
You Save: CDN$ 31.02 (37%)
In Stock.
Ships from and sold by Olivabel-US.
12 new from CDN$ 45.95
  • Connectivity Technology:Wired
  • Form Factor:External
  • Networking / Device Type:VoIP phone adapter
  • Width:115 Mm
  • Depth:75 Mm
  • Height:25 Mm
  • Data Link Protocol:Ethernet Fast Ethernet
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Product Details

  • Product Dimensions: 14 x 5.6 x 12.7 cm ; 181 g
  • Shipping Weight: 757 g
  • Item model number: GS-HT502
  • ASIN: B002FA1MUK
  • Date first available at Amazon.ca: Feb. 28 2011
  • Average Customer Review: 4.5 out of 5 stars  See all reviews (2 customer reviews)
  • Amazon Bestsellers Rank: #35,749 in Electronics (See Top 100 in Electronics)
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Customer Reviews

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Most helpful customer reviews

1 of 1 people found the following review helpful By Shanna on Jan. 17 2013
Verified Purchase
This little box is very much like the Linksys (Cisco) SPA 2102 - widely used by ISPs who provide digital phone services. It seems to work quite well, but is rather short on documentation, especially considering the very extensive number of settings in the web admin.

I like having the LAN port to connect my computer through, reducing the number of cables and connections to the router. However, i could not get this working without bridging my computer to the main router. Have not figured that one out. When i forwarded VOIP ports to the ATA from the main router the LAN port on this ATA stopped working. Maybe my lack of knowledge, i don't know.

I've had ongoing issues with this ATA losing its registration with my VOIP provider (at least once a day). This seems to have improved (and may be solved) by using the "No NAT traversal but keep alive" option. It is too soon to know for sure if this resolves it.

The box is quite warm, but not really hot, so probably nothing to worry about.

All in all this device is working fine and doing it's job, and the few small problems may be either my inexperience or problems with my VOIP provider. I cannot say at this point that this ATA has any significant issues.

Note that the HT502 has two FXS ports. The HT503 has one FXS and one PSTN -- good for anyone who needs to keep a landline but wants VOIP and landline on the same physical phone. If choosing again i might get the HT503.
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By Eric Chamberland on April 15 2014
Verified Purchase
Soooo many options in the configurations menus, but it performs better than my old linksys spa-2102. Combined with freephoneline.ca, I now have a phone number for 50$ for life!

Cool!
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Most Helpful Customer Reviews on Amazon.com (beta)

Amazon.com: 24 reviews
17 of 19 people found the following review helpful
Flawed solution April 12 2011
By R. Cane Questions - Published on Amazon.com
Verified Purchase
At first, the HT-502 worked like a charm. It was simple to set up, the two ports worked in tandem without a hitch, and all seemed right with the world.

About 2 weeks into ownership, suddenly one or both ports started losing SIP registration and failing to reacquire it: i.e., phone service would suddenly terminate, at times mid-call. The various VOIP forums had a number of complaints of similar behavior. Corrective actions that seem to have been successful for other users failed for me. Upgrading the firmware from the stable version (from 2010) to a new beta version made no change at all. Grandstream support has not responded to a ticket.

Additionally, quality of voice service began deteriorating. Echo cancellation stopped canceling echos. High frequencies became horribly distorted and clipped. And calls started breaking up, as if I were using AT&T Wireless service when not standing directly beneath a cell tower.

I could have lived with loss of registration -- painfully, but power-on resets aren't that difficult -- except that the last time the circuits dropped, the whole unit failed. It will not power on; its LEDs are blind; I am without phone service on two lines.

Alas, Grandstream seems not to offer a warranty, and I'm 2 weeks beyond the point where Amazon will accept a return. I aim to replace the unit, but am unwilling to take the risk with another Grandstream. A six-week lifespan for a phone switch is unacceptable.Even if it's just this unit that's a lemon, support for it is abominable.
9 of 9 people found the following review helpful
Wonderful device used with Callcentric Oct. 20 2010
By Hue Bell - Published on Amazon.com
Verified Purchase
Call quality is great (so is Callcentric, BTW). I recently purchased this device for use with a voice over IP calling service. I considered the Linksys models but noticed some had issues, resets, etc. This unit has been flawless. It was running within minutes and has not hiccuped in the time I've had it. I eventually hooked it up to my home circuit (disconnected from local telco) and have enjoyed never thinking about the device. If not for a reminder from Amazon, I would have forgotten it. That's the sign of a great product. And, as always, Amazon's service was #1.
7 of 7 people found the following review helpful
Craptastic power supply ruins an otherwise quality experience July 17 2013
By J. Cocchini - Published on Amazon.com
If you have a residential VOIP telephone service (voice over cable/dsl/etc.), you very likely have a Grandstream box that connects the service to your phone(s). In my case, it's an HT502. My second one, since I replaced my first VOIP provider as a result of the horribly glitchy service. I thought it was the service. Nope.

Be aware that the craptastic power supply is barely powerful enough to run the box on a good day. Trying to improve power stability by plugging it into a spike protection or heaven forbid, battery backup, actually makes it worse. This was confirmed by my current (pun) VOIP provider. The symptoms are all manner of glitchy nonsense: voice quality, unexpected hangups, whatever.

Replacing the power supply w/a 750ma unit (instead of the 500ma one) makes everything bright and shiny.

Too bad Grandstream had to spend (literally) maybe 6 cents? instead of 9 cents apiece on power adapters. It's a good unit otherwise.
6 of 6 people found the following review helpful
Works well and low cost Feb. 12 2012
By Skyfire12 - Published on Amazon.com
Verified Purchase
Purchased to replace a flakey HT503 that would keep losing its registration for no apparent reason. The 502 with the same settings has run flawlessly in it's place and has not lost server registration so I am very happy. This a budget priced unit that we use often as an ISP that sells VOIP services to the public for 19.95 per month. We have tons of them out there along with some other solutions from other vendors but are pleased with the Grandstream product line. The call quality on a decent speed high speed connection is as good as standard POTS lines. No one knows our clients are using VOIP unless they mention it. I had a rather poor quality Huwei cell phone on Cricket service and the voice quality was poor, but when I used my home line on the 502 people could not believe how clear I was comparatively so they work fine despite the low cost and if they die, they are cheap and quick to replace because you can bacxk up the config and just upload it to the replacement.
2 of 2 people found the following review helpful
Plug and Play April 3 2012
By Warren Jason - Published on Amazon.com
Verified Purchase
I have two VoIP lines from [....], a VoIP provider I've used for many years. I was using a 2-line adapter from Linksys that had gone bad after several years of service. At the recommendation of one of BroadVoice's techs, and after reading all the reviews on Amazon, I decided to try this Grandstream adapter. For redundancy, I bought two Grandstreams: one two-line adapter for each line of service to my home. That way, if either of them goes bad, I can immediately provision both lines on the remaining adapter while awaiting a replacement adapter. I hate to have phone lines down!
I've only had the Grandstreams for a week, but I can say that they were a snap to install and configure, have a stand for (optional) horizontal operation, are fully featured and I haven't had a second of stress from them.
If I were looking for gripe, I would say they cost about 25% more than they should.

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