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IP Phones Used on the Mesh

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N2MH's picture
IP Phones Used on the Mesh

Phones Used on the Mesh

The following table summarizes phones that various hams have successfully used on the Mesh. Please suggest any additions or comments below.

Model POE * Local Power Web Interface tftp Comments
7940 Yes 48V DC Partial Required 2 lines; need to load SIP; see N4SV comments
7961 Yes 48V DC Partial Required Up to 6 lines; need to load SIP; see N4SV comments
GXP-1450 No 5V DC Yes Yes 2 lines
GXP-1620/GXP-1625 1625 only 5V DC Yes Firmware updates
also via http or https
2 lines; Both models are the same phone - only 1625 supports POE
GXP-2000 Yes 5V DC Yes Yes Up to 4 lines
GXP-2140 Yes 12V DC yes yes Up to 4 lines;
GXP-2160 Yes 12V DC yes yes Up to 6 lines; has extra speed dial buttons programmable through the web interface.
GXP-2200 Yes 12V DC Yes Yes Similar to 2160; no extra speed dial buttons; nice video phone with Android but no built-in camera (ie, receive only)
GXV3240 Yes   Yes  
  • Video phone
  • Runs Android
GXV3275 Yes   Yes  
  • Video phone with large, built-in screen
  • Runs Android
  • Big brother to GXV3240
  • Too many features to list
  • See comments in another Forum post about this phone
HT503 No 12V DC Yes ? 2-port ATA 1-FXO 1-FXS
HT701 No 12V DC Yes ? 1-Port ATA FXS
DP715/DP710 No Base: 6v wall wart
Portable: 2 rech. AAA batteries
Yes Yes
  • DP715: Base unit
  • DP710: portable units (5 max)
  • One ip address shared by all portable units
Linksys(now Cisco)    
SPA503G   5V DC Yes   3 Lines
SPA504G Yes 5V DC Yes  
  • 4 Lines
  • End of Life has been announced on 2018-08-13
SPA941 No 5V DC Yes  
  • Discontinued
  • Designed for use with SPA9000 system.
  • See comments from KC8RGO in two messages below.
1535 No 12V DC No ?
  • Config via manual pushbutton menu
  • Older video phone
  • Many units have Turkish Telecom flash screen on boot up
  • Can do video calls
  • Can receive direct IP calls but cannot make direct IP calls, so calls must be set up with SIP
Obi1062 Yes 12V DC Yes ? See W7REJ comments below
SoundPoint 32x Yes 24V DC Yes Yes 2 lines
SoundPoint 33x Yes 24V DC Yes Yes 2 lines
SoundStation IP 5000 Yes POE only Yes ftp 1 line; local power via POE injector only
VVX410 Yes Yes Yes Yes 2 lines
300   5V DC Yes    
SIP-T22P Yes 5V DC Yes Yes
  • 3 lines/3 accounts
  • full featured phone
  • Discontinued
SIP-T54W Yes 5V DC Yes Yes
  • 10 lines/10 accounts
  • full featured phone
  • Nice color display

* POE here means managed 48 Volt POE (IEEE 802.3), such as obtained from an ethernet switch. It does not mean passive 12/24V power as used by a Ubiquiti node or an external 12V power supply.

Last revised 2023-01-22. Thanks for everyone's comments below and private emails.

Additional details

Some additional details for your chart;
Polycom SountPoint 3XX series, does support PoE, also works with a 24 VDC local power supply, has a WEB GUI, can also be loaded from TFTP, can support 2 lines

SNOM 300, runs from local 5 VDC power supply, has WEB GUI

Cisco 7940/60 Must first be flashed with SIP firmware, does support PoE, runs from local 48 VDC power supply, has a simplified "list only" WEB GUI but must be loaded from TFTP to function, 7940 supports 2 lines, 7960 up to 6 lines

Thanks Mark for putting the chart together, I am sure it will be helpful for those just getting started in VoIP over mesh
73, Bill, N4SV

Moderator note: Thanks for your input Bill. Your comments have been added to the chart.

kg9dw's picture
recommended deployment pattern?

For your deployments, are you using some type of pbx or sip server? Or are you dialing by IP or creating local phone books of some sort?

I really like the idea of not having a centralized server to depend upon, but I also like the ability to provide off-mesh calls or having a centralized phone book.

Moderator note: This topic moved to a new thread under VOIP. Please reply on that thread.

Since most (all?) VoIP phone

Since most (all?) VoIP phone support a central phone book via LDAP or HTTP, maybe a small program could be written to create and sync-up a phone book across the mesh and write them to a local LDAP/HTTP server. The phone just sees the local service.

For it to be truly decentralized, some type of gossip/peer discovery protocol would have to be used for info exchange.

Could be a fun project. 

Moderator note: This topic moved to a new thread under VOIP. Please reply on that thread.

2 more phones in use plus additional tested
Grandstream phones I am using.  
GXP2160 Yes 12V DC yes yes Up to 6 lines; has extra speed dial buttons programable through the web interface.
GXP2140 Yes 12V DC yes yes Up to 4 lines;
Both phones can also dial direct by ip address.  

I have tried the GXV3240.  Works the same as the others but is touch screen and can make video calls. It runs a version of the android operating system and yes I did try to install the sevral mesh software on it.  It did install and did work sort of.  Worked fine in speaker mode but if you want to use the handset the software and the phone gets confused.  I tried 2 phones over mesh which worked fine but I am sure once you get more then a few there will be bandwidth issues.  

I am also using the UCM6104 as my controller.  Very easy to configure, only 12v power requirement, It has the ability to add 4 land line connections or use an online phone service if internet is available for outside calls.  There is also instructions on grandstreams website on how to link together multiple controllers.  
They can be used as a portable unit or central server setup.  

Hope that helps add to the list and answer the controller question.  
kg9dw's picture
That UCM6104 goes for $300,
That UCM6104 goes for $300, but it sure seems to do a lot.
KS6RFI's picture
GXP2160 Phone Settings to get Registered on Broadband-Hamnet
I have a GXP2160 phone but all it sez on the screen is "Account is not registered" and I can't dial out.  I did receive an incoming call from Joe Ayers but soon as he hung up the "Account is not registered" returned to the screen.  So, what setting in the admin portion of the web browser interface did you set in your GXP2160 for it to work on the mesh?
Did you get it working?
A friend has this phone and got the same messages.  Did you get it working?  Do you have a procedure?

K5DLQ's picture
Means that either:

Means that either:

  1. your phone cannot contact your PBX server
  2. your username/id is invalid to the PBX server
  3. your password is invalid/doesn't match the PBX server
If using "DIAL by IP", and account is not needed.
Thanks Darryl, I will have
Thanks Darryl, I will have him find the parameter for dial by IP.

I had recommended that to him before and to also look for calling without registration.  I will look for the param list for that phone.  All he needs to start is IP dialing.
True.  Sometimes amazon has
True.  Sometimes amazon has it for about $250 which is when I got it.    Yes it is pricey but if you don't feel like running your own server on a computer it helps simplify things.   It also does a really cool auto setup on new phones for you and auto assignees the extension if you turn on that feature.   
I wanted to be able to do that plus have the extra option to add land lines or internet phone service to it.  There are a few events we do here that having that feature would be useful.  We usually spend quite a bit of time running land line cords to our county Sheriffs trailer during the county fair and sometimes other events.   The old analog system that is in the trailer has never worked properly so we use our own setup.  This helps simplify things a lot for us where we can now place the UCM6104 in the fair building where the land lines are located and just run the phones over wifi or one network cable going to the trailers computer system.  
The UCM6104 does have tons of features most that we will never use but since it helps do auto setup and simplify the operation a few of us decided to pitch in a buy it.  Most of our radio operators in the area do not have the best programing skills so we thought this would make things smoother which so far it has. Hope that helps give an idea on our thoughts here.  
Is it safe to run a 12V PoE
Is it safe to run a 12V PoE device off of a 24V passive source? My instinct says no but I wanted to make sure.
Use case:
Ubiquiti ToughSwitch TS-5-POE outputs either 0 or 24V passive PoE. I was wondering if I could run any of the 12V ones off of that.
AE6XE's picture
I smoked an ipcam doing this
I smoked an ipcam doing this once. Be sure to check the specs on any device that is plugged in.if the device doesn't take 24 volts, don't attach. Joe AE6XE
That's exactly what I figured
That's exactly what I figured. Is there a good way to step it down from 24 to 12 volts for the Grandstream PoE phones?
They sell DC to DC switching

They sell DC to DC switching power supplies  24v in to 12v out (and many variants there of) that may work.

This may be a bit big in this case but if you search you can find others (may need filtering) from smaller self contained modules.

N2MH's picture
Maybe a venerable 7812 voltage regulator chip might work. Be mindful of heatsink requirements.
K5DLQ's picture
this is a high-effeciency
this is a high-effeciency switching drop-in replacement for the 7812....
looks nice, but, $9
N2MH's picture
I've seen 5 volt versions of this on Digi-key. I'm sure that 12 volt versions exist as well. One nice thing about them is that if they get overloaded,they simply shut down and don't pass any power through.
AE6XE's picture
Checkout this 24v to 12v gadget..
Does that step down or just
Does that step down or just inject? To put it another way if I plug it into a 24v passive PoE source, will it output 12v without me plugging the DC power plug into anything?
WU2S's picture
Step down
The data sheet says that the input voltage is from 18v to 30v. The input side is the female RJ45.
AE6XE's picture
Correct,  the specification
Correct,  the specification says the 12v 'output' is on the 1/8" jack and builds up the fact of full 300'+ cable length (meaning 24v on the input side).    No need to build something equivalent and piece together all the parts unless you just want to.  Plug the cat5 into the 24v toughswitch port,  use this adaptor to directly plug into a 12v ipCam on the other end.  

The issue is more of a limitation on how many power-watts the ipCam/device needs and what this adaptor rating is.    The specs say 1W (probably spike), then says 0.75W elsewhere (probably continuous).  

If you have a PTZ ipCam drawing 2+W of power, this is problematic.  If so, look on the vendor site to see if same device at higher power specs, or you would need to piece all the parts together from some of the other responses.   We're locally running a 12v ipCam PTZ over a 100' Ubiquiti toughCable Pro, but using the power supply that came with the ipCam--think it was a 2A.  There's an injector on the toughswitch side--so 0v port.    It is working fine.  But the issue is voltage drop at that distance to not affect the ipCam function.

KE2N's picture

If you have to step from 24/12 see eBay 


These are small, efficient and weatherproof and don't cost that much .... similar ones can be found on Amazon.
KB5UGF's picture
24v to 12v step-down module
We use these to step down the 24 volt poe voltage to 12 volts to run our cameras on our remote node sites:
They use a LM7812 chip but are a complete module with heat sink, and under $3!
Grandstream 12V tolerance
I like the idea of being able to run off of a 12V battery.  For ham gear, that "12V" typically translates to 13.8VDC +/- 15%.  So... things start getting flaky below @11.7VDC.  As I recall, the Ubiquity nodes are spec'd to operate down to @10.5VDC, so they are fairly tolerant.  But... what about the Grandstream phones?  How low can they go before getting flaky?  And will you let the smoke out if you operate them at say... 14VDC?


K5DLQ's picture
My Grandstream GXP2000 is 5V.
My Grandstream GXP2000 is 5V.    I use a car charger adapter: 12V to 5V USB.
N2MH's picture
5V Switching Regulator

To power the phone I use with Stanley, I was able to hide the 5V switching regulator into the base of the phone.

But what about the 12V Granstream phones?
I appreciate the answers, but my question was about 12V phones.  In my mind, the 5V phones are somewhat easier, since the PoE voltage you are using is largely a moot point... you'll be using a voltage regulator or down converter of some sort in any event.  But with a 12V phone and a nominal 12V PoE system... one has to worry about how close to 12V you need to be for a particular phone.

Wall warts
If you measure the open circuit voltage of the average cheap "12V" unregulated wall wart that every electronic device comes with today they are all over the place. Usually 14-15V and I've seen 16. They're all meant for some voltage drop. I don't think the phone will have any problem operating from 11-14V volts (14V, as when your battery is under charge). That being said, my grandstream 2170's power block is exactly 12.02V open. Ha! Of course the phone is probably around 11 under load with that big screen and speakerphone blaring. U can always get a 12V regulator. I would pick one with a wide input say 9-36V if I was going to spend the money, to be able to run from 12 or 24V nominal. Ian
How are these various phones
How are these various phones at dealing with jitter? In my test pings from a Nanostation M2 on a hillside pointing at my house, I was seeing ping times swing from 150ms to 700ms and back, with a link quality of 60%. It would probably have been better if my link quality was better.
KB5UGF's picture
IP Phones and Jitter
There may be a jitter buffer setting you can adjust. We use Grandstream HT701 analog telephone adapters (about $20 used) and discarded POTS (plain old telephone system) phones. The GUI for the ATA lets you choose 3 lengths for the jitter buffer, default is medium. But what helped us the most was reshuffling the codec order from the factory preset of most to least bandwidth intensive, to the opposite, that is least to most bandwidth intensive. It now sounds a little digital (like dmr!) but rarely drops packets. Our pings are generally a little better than what you've indicated though, but trying both those things may help(?)
We have use in Europe HamNET

We have use in Europe HamNET IP Phones (and soft phones: for example PhonerLite with good codec OPUS) with asterisk PBX base on DUNDi protocol

You can see online status HamNET Europe PBX:

We have generate phone number base on callsign which is converted to DTMF code. We can use special WWW page which help generate phone number from callsign: or manually: NOCALL = N (62) + O (63) + C (23) + A (21) + L (53) + L (53) = 626323215353

73 Waldek SP2ONG

Linksys SPA941 PHONES

I have several Linksys SPA941 phones.  
POE:  no
5 Volts . . . . 12V mistake fried one (grabbed wrong wart).
4 lines
IP dialing only till I figure out more options.


  1. Click on key w/ folded over page symbol
  2. Scroll down with scroll key to NETWORK to obtain an IP address.
  3. Push the 1st button from the horizontal four buttons for SELECT.
  4. Key IP address into your browser.
  5. Press the 4th button two times (Cancel) to get back to main menu.

OK, let’s set parameters for our phone
  1. Click on User Login
  2. Click Admin Login
  3. Click Advanced
The following in bold caps are selections on the browser screen:
  1. Enter Station Name   i.e KC8RGO-4.
  2. Enter Text Logo  i.e KC8RGO-4
  3. Click Submit All Changes
HINT:  If the screen image does not return, retransmit from the URL entry.

  1. Enable IP Dialing set to YES
  2. Make call without registration  set to YES
  3. Answer call without registration set to YES.
  4. Click Submit All Changes
  1. Key- in IP addresses of phones you want to call.
  2. Click Submit All Changes
Hint: date – even though it shows the example of (MM/DD, do MM/DD/YYYY)
  1. Local Date, Time, GMT Offset
  2. Click Submit All Changes
Linksys SPA Provisioning Guide
This looks like a good starting point for getting these units up and running quickly.  Many thanks de G2DS.
Many thanks, I now have a couple of these units up and running via AREDN mesh and they work pretty well in IP dialling mode.
KS6RFI's picture
GXP2160 Phone Settings to get Registered on Broadband-Hamnet

I need some guidance for a Grandstream GXP2160 VOIP phone settings to get the phone registered to operate on Broadband-Hamnet.

K5DLQ's picture
the phone settings should not
the phone settings should not be any different between AREDN and Broadband-Hamnet.  It's all about the PBX that you are connected to.

I use Android's native sip on my cell or tablet over WiFi or Cell. The PBX server is RasPBX. Yes it has FreePBX GUI. 

But I run a small codec like G.729 over wifi.. G.729 sounds like an old 3G cell phone.. But low bandwidth. So any wired SIP phone that can run G.729 and 12 volt or lower for field work. Also for field work I don't like POE. Something else you might want to think about is App-RPT for Asterisk. 



N8NQH's picture
if you have a phone or other

if you have a phone or other device that runs off 5vdc, then there is this option for field powering from a USB port:

I strongly recommend the one made by Tripp-Lite, it handles decent current draw, works over a wider range of applications.


WU2S's picture
Very nice
A very nice cable. Thanks for finding this.
K5DLQ's picture
I made one of these with an
I made one of these with an old iphone cable that went bad...  ;-)
Thanks for the recommendation
Thanks for the recommendation.  I purchased pair and test running both a 5V AirRouter and 5V Grandstream phone off a 20AH USB battery pack.  I am at the 75% capacity mark on the battery after running 12 hours.  Will indeed be handy for quick field deployments of mesh router and phone.  Previously I was using a 7AH 12V battery which we much bulkier along with 12V Linksys router and 12V Grandstream phone.

Jeff KC8NNO Nashville TN
K6MEC's picture
I'm looking for VoIP phones
I'm looking for VoIP phones that will run off 12V batteries without excessive drain. I have several Cisco IP phones now, but they all require 48VDC.
My guess is that converting the voltage is going to be very costly from an energy standpoint, but has anyone done this, or have a resource on how to do it?
N8NQH's picture
The Grandstream GXP1600
The Grandstream GXP1600 series run off 5v, the GXV3240/3275 run off 12v.... though the latter being video phones - they draw more current.

Do you have a USB port somewhere handy, look at post #31
Cisco IP 7940 and air Router
I have been playing today with an air Router running AREDN but when plugging the Cisco IP phone into the air routers LAN ports it doesn't funtion correctly, by that it doesn't reach the PBX. Plug it into a Linksys router and it works fine.
Put a switch between the UBNT air Router and the Cisco phone it works fine.

I have the feeling its to do with the VLAN's but not sure the diffrence of the Linksys LAN ports running HSMM and the UNBT running AREDN and why the Linksys works.

N2MH's picture
Which Jack ?

Hi Andy,

When running AREDN code on an Air Router, the right most jack (when looking at the back of the node) is the DTD port, running VLAN 2 tagged. Make sure you plug your phone into the next three jacks to the left of the DTD jack. The jack all the way on the left is the WAN jack. You certainly don't want to plug your phone in  there! :-) Just beware that the 4 jacks in a row are not all LAN ports, just the 3 left-most ones.

Do you get the same condition if you plug your Cisco phone into the middle 3 jacks? Your post did not mention which jack into which you plugged your phone.

Mark, N2MH

Obihai Obi1062
Model: Obihai Obi1062
PoE: Yes
Local power: 12v
Web interface: Yes
tftp: ?
Comments: I am currently using an Obi1062. Works great with excellent voice quality. Either local or Obihai Web configuration.
KK4JZS's picture
Yealink T21P E2

I am looking at some Yealink T21P E2 phones on Craigslist.  Anyone know if there are any issues with using these?  Seems like they are very similar to the T22P model listed in the OP's table.

Thanks for any input.


N2MH's picture
Should be OK


I've configured both the Yealink T22P and a T19 phones. Aside from the number of lines, the configuration pages look identical. I would expect the same to hold true for the T21 phones. They do work well on the Mesh. Be advised that dialing by ip address on these phones is difficult compared to the Grandstream series of phones. If direct ip dialing is important to you, you may wish to look at the Grandstream phones instead. If all you want is a phone that will be behind a pbx, then Yealink will work well for you.

73, Mark

W2TTT's picture
IP Phones
Aly, Two things... embed a tiny switching regulator to preserve your phone. I have trashed devices over time with higher voltages. You can backlight the display with a few well placed LEDs.


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