---
product_id: 9442033
title: "Obihai OBi504vs Universal Telephone Adapter with 4-Phone Ports (FXS), T.38 Fax, Audio Line-In/Out Ports, 4-Port Ethernet Switch (1 GigE + 3 10/100FE), Supports 9 VoIP Accounts (SIP and Google Voice) and OBiTALK"
brand: "obihai"
price: "€ 4.16"
currency: EUR
in_stock: false
reviews_count: 5
url: https://www.desertcart.sk/products/9442033-obihai-obi504vs-universal-telephone-adapter-with-4-phone-ports-fxs
store_origin: SK
region: Slovakia
---

# Supports 9 VoIP Accounts 4-Port Ethernet Switch 4 FXS Ports Obihai OBi504vs Universal Telephone Adapter with 4-Phone Ports (FXS), T.38 Fax, Audio Line-In/Out Ports, 4-Port Ethernet Switch (1 GigE + 3 10/100FE), Supports 9 VoIP Accounts (SIP and Google Voice) and OBiTALK

**Brand:** obihai
**Price:** € 4.16
**Availability:** ❌ Out of Stock

## Summary

> 📞 Elevate Your Communication Game!

## Quick Answers

- **What is this?** Obihai OBi504vs Universal Telephone Adapter with 4-Phone Ports (FXS), T.38 Fax, Audio Line-In/Out Ports, 4-Port Ethernet Switch (1 GigE + 3 10/100FE), Supports 9 VoIP Accounts (SIP and Google Voice) and OBiTALK by obihai
- **How much does it cost?** € 4.16 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/9442033-obihai-obi504vs-universal-telephone-adapter-with-4-phone-ports-fxs)

## Best For

- obihai enthusiasts

## Why This Product

- Trusted obihai brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Stay Connected:** Never miss a call with support for 9 VoIP accounts, including SIP and Google Voice.
- • **Fast Networking:** Enjoy lightning-fast connectivity with a 1 GigE + 3 Fast Ethernet switch.
- • **Audio Excellence:** Enhance your calls with dedicated audio ports for music-on-hold and paging systems.
- • **Power Resilience:** Stay operational during outages with a PSTN line port that relays to FXS Phone Port 1.
- • **Connect with Ease:** Seamlessly integrate up to 4 regular phones, faxes, and legacy systems.

## Overview

The Obihai OBi504vs Universal Telephone Adapter is a versatile communication hub designed for modern businesses. With 4 FXS telephone ports, a robust 4-port Ethernet switch, and support for multiple VoIP accounts, it ensures seamless connectivity and audio excellence, all while providing backup options during power outages.

## Description

Extremely cost-effective, with cutting-edge technology, the ultra-flexible OBi504vs can be configured to be used for many voice and fax applications. Businesses using premise-based open-standard platforms such as Asterisk, Free PBX, PBX in a Flash or other SIP-based systems will be able to leverage the OBi504vs phone ports as user phone or fax extensions. Likewise, the OBi504vs can be deployed where the business is using a hosted service and need connections available with the OBi504vs for phones, fax machines and paging systems. When coupled with Obihai's powerful OBiTALK cloud-based management portal, the OBi504vs can be deployed in almost any voice and data networking environment, yet be securely and reliably managed from anyplace with a connection to the Internet. Software Feature Highlights: - Call Signaling for Up to 9 SIP-Based Voice Services: SIP (UDP/TCP/TLS) - OBiTALK Calling: Allows for Voice Communications Between OBi Devices and Smart Phone Apps - VoIP Codecs Supported: G.711, G.726, G.729, iLBC - Fax Over IP: T.38 Real-Time Fax over IP, G.711 Transparent Fax (Automatic) - Obihai Call Routing and Bridging Technology: Allows for Full-matrix Switching Amongst Available Services (VoIP, Land Line or Mobile Phone) and/or Ports - Secure Provisioning and Management via the OBiTALK Cloud or via TFTP, HTTP/S or via Integral Web Page - Globally Localizable: Allows for Country-Specific Dialing, Ringing, In-call Tones Additional Hardware Features: - 12v External Power Adapter - Desktop, Wall or 19' Rack Mountable - Durable Metal Enclosure with Kensington Lock Port

## Features

- 4 FXS Telephone Ports - Use with Regular Phones, Faxes and Legacy Systems
- 4 Port Ethernet Switch - 1 GigE + 3 Fast Ethernet
- 1 Line-In Audio Port - Add Music-on-Hold Audio to Calls in Progress
- 1 Line-Out Audio Port - Use with Paging Systems - SIP Addressable
- 3 USB Ports - Use with supported Obihai USB Accessories OBiLINE and OBiBT
- 1 PSTN Line Port with Relay to FXS Phone Port 1 – Use with Line Powered Phone Service in the Event of a Power Outage

## Images

![Obihai OBi504vs Universal Telephone Adapter with 4-Phone Ports (FXS), T.38 Fax, Audio Line-In/Out Ports, 4-Port Ethernet Switch (1 GigE + 3 10/100FE), Supports 9 VoIP Accounts (SIP and Google Voice) and OBiTALK - Image 1](https://m.media-amazon.com/images/I/316M4y0F-bL.jpg)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐ 3.0 out of 5 stars







  
  
    OK if you are familiar with Obihai products.. but, WHAT?  No Manual?
  

*by D***E on Reviewed in the United States on January 9, 2014*

I was excited to see the Obi508 because I needed 4 or 5 ports and wanted it all in one box.  I had used the Obi202s in the past so I was familiar with the configuration and interface.  This was a good thing because my unit arrived with ABSOLUTELY NO DOCUMENTATION.  Not a quick start sheet, manual, CD, NOTHING.  There is no documentation for the Obi508 on their website so I emailed support.  Over a week later and no response from tech support.  If you are not familiar with Obi products, better wait until they have some documentation up on their website.I decided to just treat it like an overgrown Obi202, and was able to get it up and running.  Seems to work fine, except I have no idea what the POTS line input does, or how you utilize it.  Pretty sorry for a $300 piece of gear.  Also gives me zero confidence in Obihai as far as customer support goes.

### ⭐ 1.0 out of 5 stars







  
  
    READ BEFORE YOU BUY !!!!!!!!!!!
  

*by L***R on Reviewed in the United States on January 13, 2014*

UPDATE 2019-03-22Polycom/Obi will not respond to customer's support requests to address MAJOR software issues, based on my experiences.  I have a paid support plan and they will not provide support at all.  An update will follow if and when Polycom addresses issues effecting several customers.Update 2018-11-18Support is non-existent.  Can't get them to return my calls.  Many, many issues with the service.  Never again will I buy an obi!!Update 2018-07-10Firmware updates are too buggy and support is nonexistent.  You have to pay 20.00 a year to be a "beta" tester because that is only way you will receive updates.  I'm no longer happy with the product.I received my unit a week ago and also noticed that it did not include a manual.  I assumed that OBi figured that most customers that purchase the OBi508vs are familiar with their products and also planned to have a online guide.  It now appears that they just put a quick start guide online for this unit.The first thing that surprised me when I set up the unit (I have previously purchased a few OBi202's) was the lack of OBiWiFi support.  I contacted their support and they replied quickly explaining that the potential for high bandwidth usage may affect call quality, so they chose not to currently support it.  They did, however, explain that I could connect the 508 to my existing 202's port and connect wirelessly through the 202's OBiWiFi, but they don't recommend I do this unless absolutely necessary.  I doubt that 8 concurrent calls would be smooth over WiFi too. They later stated that OBi may add the WiFi feature to the 508 at a later date, in spite of the issues.  I just wish they made that clear at purchase.  It would not have changed my mind about the purchase, but would have saved me time because I thought the unit was defective since I couldn't get ObiWiFi to work.  I now have an extra ObiWiFi dongle.Even though  in May 2014, Google Phone will stop working with Obi, I believe my Callcentric / localphone service is inexpensive enough to justify continued support of Obi products.  After extensive research, they are the providers that give the best value, in my opinion.  The 508 is new and they have only recently released their first 508 firmware upgrade.  If the 508 turns out to be as solid of a product as the 202, Obi will have a big winner.Edit on 01/15/2014:  After using the unit for a few days, I found a couple of bugs in the firmware.  Tech Support is very helpful and responsive and seemed to fix some bugs that I reported. Main problems are with SP5-8. I have learned that you can only have four service providers (Callcentric, localphone, etc.) but can choose 8 Sip lines within the four.  Would be better if it was like the 202 where each sip slot was totally independent. Also, there is no easy way to use ** codes to get to the higher ports (SP5-8) because they conflict with other services. For example, **8 is calling out to BT so **8 cant use SP8 port.A bigger issue is that the unit loses its connection (usually overnight) and requires a reboot to go back on line.  I tried to assign a static IP to see if that helps.  Wont know until tomorrow.I feel the product has great potential but it seems like the firmware is not quite ready for prime time.  An admin guide specific for the 508 would be helpful.  Changed from 4 to 3 stars.  Well, back to beta testing the 508, for now!!Edit on 02/09/2014: After using the unit for a month, the firmware seems to be much more stable.  Upgraded to 4 stars.

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    Offline doesn't work for more then 30 min. Took weeks to figure out why.
  

*by A***S on Reviewed in the United States on July 9, 2014*

Don't waste your time it simply doesn't work.  It's a great idea of having any type of service provider you want in one box, very flexible, Hardware looks solid still it actually works for about 30 minuets then it shows offline.  My other voip provider Ooma keeps working my Obi200 keeps working this thing goes offline for no apparent reason attempted a few solutions like replacing the cable modem, used Ethernet switch to no avail.  Save your money and get the 202 or other voip solution.After a few weeks I have configured the Obihai 202 with two lines I followed instruction for callcentric service.  Those instructions are very specific and detailed.  First Step was to disable ObiTalk registration!!!  a few weeks later I now realize I still had obitalk registration turned on when I configured callcentric account.  Nobody told me to turn that off tech support had failed to foresee this issue.  I think if I have manually configured it without obitalk menu would have worked perfectly.Tech support needs to understand this OBItalk configuration should be turned off and then service set up manually!!!

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-02-24*