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Step by step instructions for configuring a MeshPhone

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KE0RSX
KE0RSX's picture
Step by step instructions for configuring a MeshPhone

Hi, everyone,

I'll admit it. I feel dumb right now. I've been watching a couple of videos on Youtube, where the person uses an AREDN mesh with N2MH's MeshPhone configured. In one video, he links to an updated configuration file, but you have to be able to access the AREDN mesh that it's stored on. At this time, my mesh (three or four units) doesn't have any access to other meshes around the country. So I'm not able to get to the files/instructions.

So, would it be possible to find the step-by-step instructions for setting up the MeshPhone system, along with the configuration files?  My plan is to set up a Raspberry PI with either AsteriskPBX or FreePBX (whichever works better with N2MH's MeshPhone), and connecting that to one of the mesh nodes.

Thank you in advance.
Have a great night. :)
Patrick W0PCD (formerly KE0RSX, but I haven't updated my login and profile information yet).

 

KG7FIL
I also would like step-by

I also would like step-by-step instructions for setting up the MeshPhone system, along with the configuration files?

Robert 

nc8q
nc8q's picture
Re: Step by step instructions for configuring a MeshPhone

Hi, Patrick

The first thing I noticed about your post is the omission of the number of IP phones on your local mesh network.
Are you asking about hooking up an IP phone to your mesh node (? a mesh phone ?) or
are you asking about configuring your PBX to use the features of N2MH's 'MeshPhone' ?

I got interested in Asterisk (Actually rasPBX, which is FreePBX on a Raspberry Pi) because I
inherited 2 IP phones that could not dial out by IP address.
Thus, to utilize these phones, I needed a PBX. :-|

Locally, we have 6 hams with IP phones; some have multiple phones: home, workshop, ham-shack, Go-kit,...;
we have 2 hams with IP phones that link via tunnel from a non-adjacent county;
we have 3 hams with IP phones that link via tunnel from an adjacent county.
We also have some 'soft' phones registered on our PBXs;
e.g. Linphone or GS-Wave on computers, laptops, tablets, and/or cellphones.
Thus it was apparent to us that a PBX would be helpful.
We have 4 PBXs, some are 'trunked'.
Do you want/need a PBX?

'MeshPhone' was attractive to some of us and on 2 of our 4 PBXs we run the 'MeshPhone' configurations.
I especially like the 'dial by callsign' coupled with the 'SIP:<callsign-phone>' dial by advertised service name.
i.e. I don't need to edit my 'dial-by-callsign' configuration when a neighbor moves his (PBX unregistered) IP phone to another node.
Do you want/need 'MeshPhone'?

Chuck

KE0RSX
KE0RSX's picture
Hi, Chuck,

Hi, Chuck,

At the present time, we don't have any phones on the mesh network. The goal would be to have a PBX on the network managing phones for various agencies, along with our mobile command center. I became interested in this, because of a YouTube video that I saw, where the person had their mesh node set up on a mountain and called their phone inside of their house. They were using the FreePBX (raspbx) and smartphones running Linphone.

So, I guess the short answer is I need both the instructions on how to set up the phones on the node, and how to configure the PBX, using N2MH's configuration file. The YouTube videos that I watched were done by Comsprepper, who appears to be on the same AREDN mesh as N2MH, or at least a node that is connected to N2MH's. Here is a link to his playlist.  https://www.youtube.com/watch?v=fckJpPw_p2A&list=PLfrteFE0V6mUKqoowFbyATp9KTUXBinSh

Hopefully I answered your questions. If not, I'll look back in a couple of days, and try to be more clear.

Have a great day. :)
Patrick.

nc8q
nc8q's picture
"...we don't have any phones on the mesh network"

Hi, Patrick:

"we don't have any phones on the mesh network"

Then you have no use for Asterisk, then you have no use for 'MeshPhone'.

"I need [both the] instructions on how to set up the phones on the node,"

First things first. Get phones.

I hope this helps, Chuck

K1DOS
MeshPhone

I think you are referring to my YouTube video.  If you are not connected to the wider mesh via tunnel or RF link MeshPhone will not be much use.  You can support local dialing with a simple Asterisk installation.  Send me an email if you have additional questions (commsprepper@gmail.com)

KE0RSX
KE0RSX's picture
Thank you.

Yes, it is your YouTube videos that I was watching. We're just getting started with the mesh network, and I wanted to have this set up for when we get it up and running. In the short term, our plan would be to use Linphone on desktops and smartphones for the VoIP services. And as we can implement digital phones in various locations around the county, we'll add those into the mix. Ultimately our goal is to get our nodes into the bigger AREDN mesh network. So, I'm assuming that in the short term, we only need the local dialing with the mesh phone coming at that point.

To be honest, I thought that MeshPhone was what would configure our local dialing, and never even considered that it was the equivalent of long distance calling between different subnetworks in the AREDN network.

Thank you again. :)
Patrick.

K1DOS
It sounds like in short-term

It sounds like in short-term you will only need a RasPBX with extensions.  When the time comes to connect your nodes (island) to the wider mesh and add MeshPhone you will need your area code and extension information.  This info is required for editing the MeshPhone files.

K8MWS
Step by step instructions for configuring a MeshPhone ??

It seems I have all the same questions as the original poster.  I have RasPBX loaded and one Grandstream 1625 and was planning to use LinPhone or a similar app on my iPhone.  At this point my local mesh is a couple of Aredn nodes on opposite sides of my garage.  No mesh backbone yet here in NW Ohio.  So no - I don't NEED a PBX, but I am trying to learn the technology for the day when I might be able to assist putting together a real mesh network in our area.

I consider myself pretty technologically adept (was an MCSE at one time), but I am frustrated with trying to figure out what the best practices are for Aredn implementation of FreePBX.  For instance - should I choose PJSIP or Chan_SIP (or something else) for extensions?  The videos I find for Aredn PBX on YouTube help, but assume a base level of experience with PBX that I don't have.  I can't imagine that it is necessary to be an expert with all the nuances of PBX to be able to configure a very basic system to get started...   On the other hand, maybe this MeshPhone would be useful as I would like to be able to tunnel to other mesh networks?

Any help or direction would be GREATLY appreciated!  Thanks!

nc8q
nc8q's picture
Aredn implementation of FreePBX

Hi, Mark:

You seem to be 30 miles from the other active mesher in NW Ohio, James, W8ERW.
Since you don't have a connection to an AREDN Mesh, let us hold off on how to
ARDENize a PBX. ;-) I use RasPBX primarily with a Grandstream GXP-1630. So, we
have this much in common already. To 'register' an IP phone I use the default
'extension' protocol 'Chan_SIP' in FreePBX. 1st let us get your 1625 and a
softphone (smartphone, tablet, or desktop) working. I've tried Linphone, Zoiper,
and GS-Wave. Since you have a GS 1625, maybe start with GS-Wave softphone.

'tunnel to other mesh networks?'
Options will exponentially blossom from here:
Meshphone: Worldwide direct dial, local and international conference calls,
date/time/extension/, test tones, Wx radio, dial-by-callsign, ...
Simply, Meshphone is several .conf files added to FreePBX. Easy-peasy to
'cut-n-paste'...once you obtain the .conf files. :-|

I have a very slow (cheap) ISP connection (~2 Mbps), but I can
grant you a temporary tunnel so you can see our local version of
AREDN-ized and Meshphone-ized PBXs. My email addresses at qrz dot com and
callsign at arrl dot net are valid.

Chuck

K8MWS
Aredn implementation of FreePBX

Hi Chuck - thanks for the quick reply.
I have managed to figure out setting up a couple of test extensions on the FreePBX, and tied one of these accounts to my phone. Of course with one phone I can't do much, but I get a busy signal if I dial it's number - so that seems like some progress!  Next up will be figuring out how to get GS-Wave or LinPhone talking to my FreePBX.  I will take you up on the offer for a temporary tunnel once I work through these issues.  Thanks!

w8erw
w8erw's picture
MESh, IP Phones, RasPBX etc.

Hi Mark,
 
I've not gotten into the IP phone aspect although many of us now are using Hamshack Hotline to accomplish much of the same functionality.  I'm in  Fremont, just East of you.  We have quite a few AREDN Meshers in Sandusky and Seneca Counties and several are using Hamshack Hotline on the MESH network.  I have 9 tunnel connections to me here from various users in both counties including the EOC's.  Let me know if you have further questions.  There are also a few AREDN Meshers in the Toledo area.  
 
Thanks,

Jim
W8ERW

K8MWS
MESh, IP Phones, RasPBX etc.

Hi Jim - nice to hear from you.  Things are slowly moving forward around the Toledo area for the Aredn Mesh, but I am sure it will take a while.  In the meantime I might get back in touch with you about setting up a tunnel connection once I figure out enough to know what questions to ask!  Thanks!  Mark

w8erw
w8erw's picture
NW Ohio AREDN Mesh

Hi Mark,
Have you gotten any equipment yet?  If not, I'd suggest you read as much as you can here on the AREDN website.  There is a trove of information and discussion on hardware and application.  Personally, I like one of the more recent products, the MikroTik hAP AC Lite.  Not the easiest to set up, but it's powerful, compact and works very well.  If you wish to just explore and minimal cost, I'd have a look at the  GL iNET AR150.  This is palm sized little rascal with a lot to offer at a small cost.  If you have a look at the Supported Hardware page, clicking on the name in the list (green Items), often that will take you to Amazon.com with some excellent pricing.  I'd also tell you to have a look at Hamshack Hotline.  These folks are offering a VOIP service to Hams only (4 digit calling, no access to the PSTNwhich is free other than the telephone device you will need.  Many of us are using the service and it's another great tool in the ARES bag of tricks.  Hamshack Hotline works well behind the AREDN Network too.  HamshackHotline.com

73,

Jim W8ERW
 

K8MWS
 
 
Currently I have the following equipment:
Ubiquiti Nanostation M2
Ubiquiti Nanostation M2 Loco
MikroTik hAP Access Point
GL.iNet GL-USB150 Microrouter
Grandstream 1625 phone
Cheap SV3C IP camera  
I've got a Netgear GS-105E managed switch coming from Amazon so I can start playing around with VLANs. 
Plenty of new shiny things to play with!

I just finished my first version of a Go-Box with the MikroTik AP, a raspberry pi pbx, a POE, and the necessary power supply and converters so I can directly connect the camera, phone, and dtd one of the Ubiquiti nodes.  For now it is really just a test bed for me to learn about all this without having wall warts and cables strewn all over my desk.

Eventually I envision setting up the MikroTik-AP here at home (with the necessary VLANs, etc) as a permanent home Aredn node, connected for the foreseeable future to the wider Aredn Mesh world by internet tunnel.  If and when a mesh backbone is assembled in the Toledo area, then I would add some kind of node with a directional antenna to connect.  For now the Nanostation nodes, phone, camera, etc will be (hopefully) put to use for temporary mesh configurations like the Toledo Air Show or other special events.

I will definitely check out Hamshack Hotline.com - sounds very interesting.

Thanks!  Mark
w8erd
Iphone and GL-USB150

The USB150 works fine when plugged into my windows PC.
I got the necessary cable to connect it to my Iphone5.
The Iphone does not recognize it using Safari.
Has anyone made this work?
Thanks!

Bob W8ERD

k6dlc
k6dlc's picture
  I just order another phone

  I just order another phone to play with, Grandstream 1625 phone. I have a Cisco 7961 that is brick now. There is no Cisco OS and was unable to change the TFTP configuration,  I have one of my raspberry pi with Free PBX install. I wish there was a place to download CISCo OS. I no longer working, retire.

kf5dey
Is there some background documentation on this?

I have a PBX running at home (Incredible PBX - i.e. FreePBX) on a Pi. I have an Allstar node (hamvoip on a Pi). They are trunked together via IAX so I can use my SIP phones with it, so I understand at least the basic concepts of PBX/asterisk/trunking. I also have a pair of AREDN nodes+managed switch. (intended for deployment, not a permanent install at my house...out of range of everyone anyway)

I am trying to understand the role "meshphone" plays, does it auto provision phones? Does it 'autotrunk' (my term) across the AREDN mesh? Or is it simply another PBX that has to be manually trunked?

I an trying to figure out if this is somehow better than running FlexPBX for management of the node phone system? If so how? (I know, of course Linux terminal is the best, and only the unpure use nano instead of VI, etc.) :)

Also what is the Topology of PBX phones in the AREDN system, and is there a standard calling plan / naming convention?

This all came up because I finally learned enough PBX to add one to my AREDN node setup.

Is this "meshphone" a thing, or was this project abandoned?

Thanks, Mike

nc8q
nc8q's picture
Define meshphone

'meshphone' may be an IP phone on a mesh network.
If you are referring to N2MH's amalgamation of 'Asterisk' skeleton configuration files...

"does it auto provision phones?" No but I assume that Asterisk supports this.

"Does it 'autotrunk' (my term) across the AREDN mesh?"
- No, does anything 'autotrunk'?
- What is "the AREDN mesh"?
- Is 'the AREDN mesh' a every AREDN device in the world, or those devices linked in your local AREDN IP network?

"Or is it simply another PBX?". It is configuration files edited/added into a PBX.

N2MH-MeshPhone:
"MeshPhone is a network of approximately 40 PBX's that are connected primarily by Mesh.
It features a 7-digit network dialing plan and operates similar in some respects to Autovon.
There is also a feature called "Dial by Callsign" where on any pbx, a person in that area can be called by his callsign using the corresponding keys on a telephone. MeshPhone also has connectivity into HamShack Hotline"

N2MH-MESHPHONE has dial by extension. This is a simple PBX.
- Voice mail - This is, kinda, simple PBX.
- dial by callsign - This is cool, no need to have a whitepages handy, if you know the local callsign.
- dial 'long distance' via coordinated and standardized trunks
- Conference Bridge. - This is, kinda, simple PBX.
- Test numbers: DTMF, Date/Time, Echo, milliwatt, 3 tone slope, PBX ID, Extension ID.

"I an trying to figure out if this is somehow better than running FlexPBX for management of the node phone system?"
Sorry, I have no knowledge of FlexPBX.

"Also what is the Topology of PBX phones in the AREDN system?" It does not alter the topology of a network. It can/does add trunks to other PBXs.

" is there a standard calling plan / naming convention? " Yes, the North America Numbering Plan


"Is this "meshphone" a thing, or was this project abandoned?" Lemmee check.....Yep, I just dialed N2MH's Conference Bridge. It is still a thing
 

I hope this helps,
Chuck

kf5dey
Did I type FlexPBX? I meant

Did I type FlexPBX? I meant FreePBX a GUI frontend for Asterisk...so it is asterisk that is easier to modify and monitor.

If I google the term 'meshphone' it points to N2MH website, that assumes you understand what they are talking about.

Right now I am assuming we are talking about open AREDN nodes...those nodes when powered up automatically populate themselves and create a redundant mesh for intercommunication using digital means (you know this website is called arednmesh right?)...do to standard settings.

If i plug a non provisioned SIP phone into a AREDN node then it is just a lump of plastic.

If I put a PBX on a node, and provision my SIP phone to it...then it is at least a working SIP phone but can't talk to anyone.

If I put a second SIP phone on, or trunk to another PBX, then I can talk to someone else.

So to rephrase the question...what does the software associated with N2MH and associated with the google search term 'meshphone' and also associated with AREDN meshed networks, bring to the table outside what every other PBX software does?

I asked these questions to the email address on the N2MH website, but have not yet received an answer.

I am trying to understand if this is something worth looking into and adding, but I can't even get a straight answer on what it is or what it brings to the table.

If someone could point me to a document somewhere that explained what the point of N2MH's software package addition to asterisk and associated with the name meshphone, so I could do some self guided research on the subject, it would be appreciated.

Thanks, Mike

nc8q
nc8q's picture
MeshPhone(sm)

Hi, Mike:

"Did I type FlexPBX?" Yep.

"I meant FreePBX a GUI frontend for Asterisk." Oh, okay.

"..so it is asterisk that is easier to modify and monitor."
Huh? FreePBX (and rasPBX, which I use) is a GUI frontend to Asterisk.
I did set up a PC with FreePBX and was able to trunk a PBX on the internet to my rasPBX on my AREDN LAN.

"If I google the term 'meshphone' it points to N2MH website, that assumes you understand what they are talking about."
Sorry, I do not 'google'. I 'DuckDuckGo'. I just "googled" 'meshphone and a page of advertisements was displayed.

Okay, so this thread is about:
N2MH MeshPhone℠ is my contribution to providing a service over the Amateur radio mesh network.
N2MH MeshPhone℠ has two parts:

A local PBX supplying sip dialtone to a number of users in the area.
A network service that links together a number of other pbx's out on the Mesh with a common dial plan amongst everyone.
- This allows anyone on the network to call anyone else on the network by dialing 7 digits.
- This 7-digit number is called a "MeshPhone Number" and is the same number anywhere on the network.

"Right now I am assuming we are talking about open AREDN nodes...those nodes when powered up automatically populate themselves and create a redundant mesh for intercommunication using digital means (you know this website is called arednmesh right?)...do to standard settings."

Automatic adaptive discovery and network routing...capable of surviving in a mesh/redundant group of nodes.

"If i plug a non provisioned SIP phone into a AREDN node then it is just a lump of plastic."
Not necessarily.
My Nortel 1535 will obtain an IP address from my host node, will permit a dial-in, but has no IP-to-IP dial-out.
My GrandStream GXP-1630 will obtain an IP address and can dial-in/out by IP address.

"If I put a PBX on a node, and provision my SIP phone to it...then it is at least a working SIP phone but can't talk to anyone. "
My rasPBX MeshPhone(sm) can be configured to SIP: dial another IP phone by IP address.
The other phone does not need to be registered to a PBX. There only needs to be a 2nd phone on the (AREDN) LAN.

"If I put a second SIP phone on, or trunk to another PBX, then I can talk to someone else." Yep.

"So to rephrase the question...what does the software associated with N2MH and associated with the google search term 'meshphone' and also associated with AREDN meshed networks, bring to the table outside what every other PBX software does?"

MeshPhone(sm) is a group of skeleton .conf files that can be locally edited.
Some of those configuration files are styled to be enhancements for Amateur Radio operators.

"I asked these questions to the email address on the N2MH website, but have not yet received an answer.

I am trying to understand if this is something worth looking into and adding, but I can't even get a straight answer on what it is or what it brings to the table. "

Please reread the portion of
https://www.arednmesh.org/comment/16501#comment-16501
From "N2MH-MeshPhone:" through
"- Test numbers: DTMF, Date/Time, Echo, milliwatt, 3 tone slope, PBX ID, Extension ID."

"If someone could point me to a document somewhere that explained what the point of N2MH's software package addition to asterisk and associated with the name meshphone, so I could do some self guided research on the subject, it would be appreciated."

Sorry. I think N2MH has not put his MeshPhone(sm) configuration files on the 'web'.
You may think of MeshPhone(sm) as enhancements to standard Asterisk(c) configuration files that might benefit an Amateur Radio operator on an AREDN network.
1st things 1st...are you considering adding a PBX to your AREDN network?
2nd, are the enhancements I previously mentioned of interest to you?

Thanks, Mike

 

I hope this helps,
Chuck

kf5dey
Yes I will be adding PBX to

Yes I will be adding PBX to my AREDN nodes.

So I have to assume that the 'meshphone' addition to asterisk somehow adds "From "N2MH-MeshPhone:" through "- Test numbers: DTMF, Date/Time, Echo, milliwatt, 3 tone slope, PBX ID, Extension ID." In some kind of pre-populated framework?

To make it easier for someone to set up a PBX?

That concept I understand.

I apparently was under the false impression that this was some type of software package designed to more easily roll out standardized PBXs and and more easily set up trunking in a deployment scenario.

I see now that I was incorrect in my assumption.

Thanks, Mike

nc8q
nc8q's picture
Asterisk, FreePBX. MeshPhone configuration files

Hi, Mike:

"some kind of pre-populated framework?"
The 'framework' is (Asterisk(c)) configuration files.  (*.conf).
The 'configuration files' is how the PBX is purposed for the services you want.

"To make it easier for someone to set up a PBX?"
To make it easier to add those services previously mentioned to Asterisk (the PBX, the backend)
using FreePBX (the GUI, the frontend) to add the MeshPhone(sm) skeleton configuration files.

You will need an Asterisk PBX.
The FreePBX (frontend) releases install Asterisk (backend).

I hope this helps,
Chuck
 

N2MH
N2MH's picture
I followed up off line with

I followed up off line with Mike, KF5DEY, and for what he wants to do, MeshPhone is probably overkill. However, to follow up on MeshPhone, what it is, and how to install it, there is good info in another post about all of this

https://www.arednmesh.org/content/meshphone

As I mentioned to IZ5FSA, contact me off line for more info or if you have a problem accessing this information.

73, Mark, N2MH

KE0RSX
KE0RSX's picture
Dragging up my old thread...

I'm returning to this thread because we are starting to get digital phones and have FreePBX set up on a server to roll them out. From my understanding, we should set up a local PBX (local dialing) and get everything working. Then, after we've established our "island", we would implement the MeshPhone configurations in order to join the larger mesh and larger PBX network.
Putting the cart ahead of the horse for one second, if I understand things correctly, my MeshPhone dialing number would be 563xxyy (where 563 is my area code or NPA number) and xx would be the prefix, so to speak, and the yy would be the number for the individual phone. The idea is that if I were to set my extensions up as 9700 to 9799, my "MeshPhone number" would be 5639700 to 5639799.

Assuming that I'm correct in this, then I want to set my local numbers up to be the xxyy from above, correct? (in my example 9700 to 9799 for local numbers).

So now the silly question for why I'm posting again. How do I decide what set of numbers to use? Do I just pick a set of two numbers and go from xx00 to xx99, or is there some roadmap for who should use what numbers in an area code? We're the first mesh to be set up in my area code, so the options are wide open. A second question is this... Our ARES team is basically three counties in two districts that are working together. So, would we want to put all three under one local number system, or would we need to divide them up by county (or district).  what I mean by this is Muscatine and Louisa Counties are in District 5 and Cedar County is in District 4. But our core members are members of all three teams.

I'm sure it will be futher down the road before we try to join the larger mesh network. But, I want to get everything set up right now, so that we don't have to change things then.

Have a great night, and Happy New Year. :)
Patrick.

N2MH
N2MH's picture
You Are Correct

Hello Patrick,

You are quite correct in your assumptions. And, by deciding on your local number plan in advance, you are definitely not putting the cart before the horse, but quite the opposite.

Since you are the first to set up shop in 563, you are free to choose any local 4-digit plan that suits you. The only caution would be to steer clear of any numbers that begin with "7". The digit 7 is used in MeshPhone as the first digit of two-digit access codes that bring you into various features of MeshPhone. For example, 73 gets you into the Dial by Callsign feature where you can call someone by their callsign, or even by some alpha-numeric string such as "EOC", etc. 78 gets you into the MeshPhone dial plan where you dial the 7-digit network number for someone out on the network. When choosing a local number range, you should give some thought as to how many extensions you will need. Extensions are used for both people (who may need more than one extension) and for locations such as repeater sites, EOC's, hospitals, etc. Maybe even services such as your local NOAA Weather Radio broadcast. Your local environment will drive this number.

With regard to your area consisting of 3 counties and 2 districts - you could give each county/district their own unique 2-digit extension range and arrange your local network for 4-digit dialing. So, county A could be 91xxx, county B could be 92xxx, county C could be 93xxx, or something similar. For the actual hardware PBX, you could do it all with one PBX (if you have good Mesh connectivity) or with a PBX in each county with trunks between all 3 switches, or something else in between. If you go the separate PBX route, you will have some measure of survivablilty in case one PBX fails or you lose Mesh connectivity. With MeshPhone trunks, some simple digit manipulation on each end will support both 4-digit and 7-digit dialing. This means that you will not need separate trunks for each dialing method.

I proposed this idea for the whole state of Tennessee on their Mesh network and they adopted it and are using it today. They have a 4-digit dial plan for local calling within the state, regardless of county. Groups of counties have 90 or 190 available extensions, depending on their population (which also drives the number of hams in that county). For the greater wide area MeshPhone network, each county uses their local Area Code plus their 4-digit local number. In addition, several hams have developed their own Go-Kit pbx's that tie into the greater MeshPhone network.

Note that each PBX reserves 10 extension numbers for network purposes and testing. You should take that into account when developing your extension needs.

Hope this answers your questions.

73, Mark, N2MH
 

w8erw
w8erw's picture
VOIP PBX

Partick,
 
Understand PBX is "Private Branch Exchange", normally, you will be setting up 4 digit station numbers.  7 or 10 digits would begin to conflict with the "North American Numbering Plan" and is not necessary.  Using only 4 digit station numbers, you could call and connect with any other station on your system.  To go outside your system you would add truck level access, dial 9 for instance and receive dial tone from a trunk provided by a SIP provider or in our case perhaps a trunk from Hamshack Hotline.  With this you would then proceed to dial what ever station or phone number you desired on the remote system.  Multiple level access arrangements would also be possible with trunks provided by more than one entity and each having it's own level access digit followed by station number on that system which could be either 4 or 7 digits.  With the proper set up, these other systems could then also dial into yours in a similar manner.  Trunk level access would normally allow multiple calls to be made.  You could also use local POTS, "Plain Old Telephone Service" for outside access locally.  This would would in the same manner although allowing for only a single connection or call at a time.  Once you have all this set up the MESH becomes the transport vehicle and acts as any other IP network to provision VOIP service.  You could also set up your own trunking arrangements between one or more additional PBX's configured on Raspberry Pi's for instance.  Think of all this within a modular concept, configuring each island or local PBX and then adding what other connections desired.  Each one then operating within it's own environment or also having the additional capability of connecting to the others.  I trust this all makes some sense.  Jim
 

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