Back to School: It’s Incredible PBX 16-15 for the Raspberry Pi

It’s Back to School Time in the U.S.A., and we have a terrific new August project for you and your shiny new Raspberry Pi 4. It features Asterisk® 16 with all the latest FreePBX® 15 GPL modules plus the feature sets of Incredible PBX® and RasPBX and RonR’s latest build. And it’s all rolled into one terrific (free) bundle. It’s literally the best of all worlds. Finally, a word of caution. This is a work in progress. If you’re looking for instant perfection, come back after Labor Day. But, if you want to roll up your sleeves and participate in an open source project, you’ve come to the right place. We welcome your comments AND contributions. After all, that’s what open source development is all about. Participate!

This is the first of several articles on Incredible PBX 16-15. Today, we’ll get your platform built and walk you through what’s included in the new build. You can expect a new release regularly until we work through all of the kinks and some of the missing pieces. If you’ve been following our articles this past month, you already know that restoring backups from Incredible PBX 13-13 into Incredible 16-15 was one of the primary development goals of FreePBX 15. It remains a little rough around the edges, but we’re close on the CentOS platform. And, in coming weeks, we’ll integrate what we’ve learned on the CentOS 7 platform into the Raspbian 10 Buster image for the Raspberry Pi. In the meantime, come enjoy and explore the powerful, new feature set that comes with Incredible PBX 16-15 out of the box. Unlike RonR’s build, there’s nothing to compile with Incredible PBX 16-15 for Raspbian 10 even though all of the components are there to let you do so whenever the mood strikes. And, unlike the FreePBX Distro, we don’t rely on static packages which make it difficult to make future modifications on your own. Instead, Incredible PBX 16-15 offers a snapshot image with a complete toolkit to make future modifications as desired.

What’s Included? Incredible PBX 16-15 for Raspbian 10 serves up a VoIP powerhouse featuring Asterisk 16 and all FreePBX 15 GPL modules, an Apache web server, the latest MariaDB SQL server (formerly MySQL), Exim4 mail server, and most of the Incredible PBX feature set including SIP, SMS, voice recognition, AsteriDex, PicoTTS Text-to-Speech VoIP applications plus fax support, Click-to-Dial, News, Weather, Telephone Reminders, and hundreds of features that typically are found in commercial PBXs: Conferencing, IVRs and AutoAttendants, Email Delivery of Voicemail, Voicemail Blasting, and more. We’ve also incorporated the Zero Trunk Configuration feature from the LITE build which lets you sign up with one of four VoIP providers and start making and receiving calls instantly.

Choosing a SIP Provider. As we mentioned, Incredible PBX 16-15 comes preconfigured to support four of the major SIP providers: Skyetel, VoIP.ms, V1VoIP, and Anveo Direct. We obviously hope you’ll choose Skyetel not only because they financially support Nerd Vittles and our open source projects, but also because it is a clearly superior platform offering crystal-clear communications and quadruple-redundancy so you never miss a call. Skyetel also sets itself apart from the other providers in the support department. They actually respond to issues, and there’s never a charge. As the old saying goes, they may not be the cheapest, but you get what you pay for. Even without taking advantage of Nerd Vittles free $10 credit plus a half-price offer on up to $500 of Skyetel services, they’re still dirt cheap compared to the Bell Sisters and cable companies. Traditional DIDs are $1 per month. Outbound conversational calls are $0.012 per minute. Incoming conversational calls are a penny a minute, and CallerID lookups are $0.004. With all four providers, you only pay for minutes you use. Using more than one is a good idea. With your Skyetel $10 credit, there’s ample funding to order a phone number and make hundreds of calls at zero cost. Once you’re satisfied with the service (and you will be), you can fund your account with up to $250, and Skyetel will match your deposit plus give you free number porting for any existing numbers you want to add to your account. Quite literally, you have nothing to lose. Effective 10/1/2023, $25/month minimum spend required.

Before you can deploy Incredible PBX 16-15, you’ll first need the necessary Raspberry Pi hardware. Here’s the short list and, if you’re in a hurry, the $35 Raspberry Pi 3B+ will cost you less than $3 extra to get it quickly from Amazon using our referral link. If you prefer to wait for a Raspberry Pi 4, read on. Either way, the RasPi remains one of the world’s best bargains! Assuming you already own an HDMI-compatible monitor and a USB keyboard…

Raspberry Pi 4B from a Raspberry Pi reseller

$8 USB-C RasPi 4 (only) Power Supply

$10 32GB microSDHC Class 10 card (strongly recommended!)

$5 Official RasPi 4 Case

Here’s our 10-Step Guide to installation and setup. "Automatic" means just watch. Steps #1 and #2: follow the links. For the remaining steps, we’ll further document the procedures.

1. Download and unzip Incredible PBX 16-15 image from SourceForge
2. Transfer Incredible PBX 16-15 image to microSD card
3. Boot Raspberry Pi from new microSD card (16GB minimum)
4. Login to RasPi console as root:password to initialize your server (Automatic)
5. In raspi-config Advanced Options, Expand FileSystem to fill your SD card
6. In Localization Options, set Locale, TimeZone, Keyboard, & WiFi Country
7. Reboot after writing down your server IP address (Automatic)
8. Login via SSH or Putty as root:password to set passwords & setup firewall (Automatic)
9. Run admin-pw-change to set the admin password for access to the web GUI
10. Register for and configure at least one trunk provider for Incredible PBX 16-15
11. Enjoy!

Incredible PBX 16-15 requires Internet connectivity to complete its automated install. If you’re using a wired network connection, you can skip to the next section. With the Raspberry Pi 3B and 4B, WiFi is built into the hardware. But you still have to insert your SSID name and SSID password to make a connection to your WiFi network. To do so, follow these next steps carefully. Insert the Incredible PBX 16-15 microSD card into your Raspberry Pi 3 or 4 and apply power to the hardware. When the bootup procedure finishes, login as root with the default password: password. At the first prompt, DO NOT PRESS THE ENTER KEY! Instead, press Ctrl-C to break out of the setup script. At the command prompt, issue the following commands to bring up the WiFi config file:

cd /etc/wpa_supplicant
nano -w wpa_supplicant.conf

If your WiFi network does not require a password, uncomment or insert the four lines below and save the file: Ctrl-X, Y, then Enter. Now restart your server: reboot. When the reboot finishes, you now should have network connectivity.

network={
 key_mgmt=NONE
 priority=1
}

If your WiFi network requires a password, uncomment or insert the following into wpa_supplicant.conf:

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1

network={
 ssid="YourSSID"
 psk="YourSSIDpassword"
 key_mgmt=WPA-PSK
 scan_ssid=1
 priority=7
}

Then scroll down to the SSID entry and replace YourSSID with the actual SSID of your WiFi network. Make sure you preserve the entry with the quotes as shown. Next, replace YourSSIDpassword with the SSID password of your WiFi network. Save the file: Ctrl-X, Y, then Enter. Now restart your server: reboot. When the reboot finishes, you now should have network connectivity.

Once the reboot process finishes, you should see an entry on about the middle line displayed on your monitor which reads: "My IP address is…". Write down the IP address shown. You’ll need it in a minute. Skip the next section since you are using a WiFi connection.

If you don’t see an IP address assigned to your server, then correct the network deficiency (invalid WiFi credentials, DHCP not working, Internet down), and reboot until you see an IP address assigned to your server. DO NOT PROCEED WITHOUT AN ASSIGNED IP ADDRESS.

Incredible PBX 16-15 requires Internet connectivity to complete its automated install. After connecting your server to your local network with a network cable, insert the Incredible PBX 16-15 microSD card into your Raspberry Pi and apply power to the hardware. When the bootup procedure finishes, you should see an entry on about the middle line displayed on your monitor which reads: "My IP address is…". Write down the IP address shown. You’ll need it in the next step.

If you don’t see an IP address assigned to your server, then correct the network deficiency (cable not connected, DHCP not working, Internet down), and reboot until you see an IP address assigned to your server. DO NOT PROCEED WITHOUT AN ASSIGNED IP ADDRESS.

Unless your desktop PC and RasPi are both on the same private LAN, the remainder of the install procedure should be completed from a desktop PC using SSH or Putty. This will assure that your desktop PC is also whitelisted in the Incredible PBX firewall. Using the console to complete the install is NOT recommended as your desktop PC will not be whitelisted in the firewall. This may result in your not being able to log in to your server. Once you have network connectivity, log in to your server as root from a desktop PC using the default password: password. Accept the license agreement by pressing ENTER. You then will be redirected to raspi-config. This is the utility used to expand your Incredible PBX 16-15 image to use your entire microSD card. If you fail to complete this step, your microSD card will be restricted to 16GB. In the raspi-config utility, choose Localization Options and set Locale, TimeZone, Keyboard, & WiFi Country. Then choose Advanced Options. All of the defaults should be satisfactory with the exception of the first item: Expand Filesystem. Choose this option and activate the resizing directive. Review the other items and then exit and reboot.

Once your server reboots and you log back in as root, all of your passwords will be randomly assigned with the exception of the root user Linux password and your admin password for access to the web GUI. You can set the root password by issuing the command: passwd. Set the admin password for access to the web GUI with this command: /root/admin-pw-change. With the exception of these two passwords, the remaining passwords can be displayed using the command: /root/show-passwords.

Finally, if your PBX is sitting behind a NAT-based router, you’ll need to redirect incoming UDP 5060-5061 and UDP 10000-20000 traffic to the private IP address of your PBX. This is required for all of the SIP providers included in the Incredible PBX 16-15 build. Otherwise, all inbound calls will fail.

If you’ve decided to go with Skyetel, here’s the drill. Sign up for Skyetel service and take advantage of the Nerd Vittles Free $10 credit and BOGO special. First, complete the Prequalification Form here. You then will be provided a link to the Skyetel site to complete your registration. Once you have registered on the Skyetel site and your account has been activated, open a support ticket and request the $10 credit for your account by referencing the Nerd Vittles special offer. Once you are happy with the service, open another ticket after funding your account and request that Skyetel match your deposit of up to $250. That gets you up to $500 of helf-price calling. Credit is limited to one per person/company/address/location. If you have numbers to port in, you can do it at no cost after funding your account.

Skyetel does not use SIP registrations to make connections to your PBX. Instead, Skyetel utilizes Endpoint Groups to identify which servers can communicate with the Skyetel service. An Endpoint Group consists of a Name, an IP address, a UDP or TCP port for the connection, and a numerical Priority for the group. For incoming calls destined to your PBX, DIDs are associated with an Endpoint Group to route the calls to your PBX. For outgoing calls from your PBX, a matching Endpoint Group is required to authorize outbound calls through the Skyetel network. Thus, the first step in configuring the Skyetel side for use with your PBX is to set up an Endpoint Group. Here’s a typical setup for Incredible PBX 16-15:

• Name: MyPBX
• Priority: 1
• IP Address: PBX-Public-IP-Address
• Port: 5060
• Protocol: UDP
• Description: 16-15.incrediblepbx.com

To receive incoming PSTN calls, you’ll need at least one DID. On the Skyetel site, you acquire DIDs under the Phone Numbers tab. You have the option of Porting in Existing Numbers (free for the first 60 days after you fund your account) or purchasing new ones under the Buy Phone Numbers menu option.

Once you have acquired one or more DIDs, navigate to the Local Numbers or Toll Free Numbers tab and specify the desired SIP Format and Endpoint Group for each DID. Add SMS/MMS and E911 support, if desired. Call Forwarding and Failover are also supported. That completes the VoIP setup on the Skyetel side. System Status is always available here.

To sign up for VoIP.ms service, may we suggest you use our signup link so that Nerd Vittles gets a referral credit for your signup. Once your account is set up, you’ll need to set up a SIP SubAccount and, for Authentication Type, choose Static IP Authentication and enter your Incredible PBX 16-15 server’s public IP address. For Transport, choose UDP. For Device Type, choose Asterisk, IP PBX, Gateway or VoIP Switch. Order a DID in their web panel, and then point the DID to the SubAccount you just created. Be sure to specify atlanta1.voip.ms as the POP from which to receive incoming calls.

To sign up for V1VoIP service, sign up on their web site. Then login to your account and order a DID under the DIDs tab. Once the DID has been assigned, choose View DIDs and click on the Forwarding button beside your DID. For Option #1, choose Forward to IP Address/PBX. For the Fowarding Address, enter the public IP address of your server. For the T/O (timeout) value, set it to 2o seconds. Then click the Update button. Under the Termination tab, create a new Endpoint with the public IP address of your server so that you can place outbound calls through V1VoIP.

To sign up for Anveo Direct service, sign up on their web site and then login. After adding funds to your account, purchase a DID under Inbound Service -> Order DID. Next, choose Configure Destination SIP Trunk. Give the Trunk a name. For the Primary SIP URI, enter $[E164]$@server-IP-address. For Call Options, select your new DID from the list. You also must whitelist your public IP address under Outbound Service -> Configure. Create a new Call Termination Trunk and name it to match your server. For Dialing Prefix, choose six alphanumeric characters beginning with a zero. In Authorized IP Addresses, enter the public IP address of your server. Set an appropriate rate cap. We like $0.01 per minute to be safe. Set a concurrent calls limit. We like 2. For the Call Routing Method, choose Least Cost unless you’re feeling extravagant. For Routes/Carriers, choose Standard Routes. Write down your Dialing Prefix and then click the Save button.

Before you can make outbound calls through Anveo Direct from your PBX, you first must configure the Dialing Prefix that you wrote down in the previous step. Using a browser, login to the GUI as admin. Navigate to Connectivity -> Trunks -> Anveo-Out. Click the Pencil icon to edit the trunk settings. Then click the Custom Settings tab. Replace anveo-pin with your actual Anveo PIN. Click Submit and Apply Settings to save your changes.

By default, incoming Anveo Direct calls will be processed by the Default inbound route on your PBX. If you wish to redirect incoming Anveo Direct calls using DID-specific inbound routes, then you’ve got a bit more work to do. In addition to creating the inbound route using the 11-digit Anveo Direct DID, enter the following commands after logging into your server as root using SSH/Putty:

cd /etc/asterisk
echo "[from-anveo]" >> extensions_custom.conf
echo "exten => _.,1,Ringing" >> extensions_custom.conf
echo "exten => _.,n,Goto(from-trunk,\\${SIP_HEADER(X-anveo-e164)},1)" >> extensions_custom.conf
asterisk -rx "dialplan reload"

We’re in the home stretch now. You can connect virtually any kind of telephone to your new PBX. Plain Old Phones require an analog telephone adapter (ATA) which can be a separate board in your computer from a company such as Digium. Or it can be a standalone SIP device such as ObiHai’s OBi100 or OBi110 (if you have a phone line from Ma Bell to hook up as well). SIP phones can be connected directly so long as they have an IP address. These could be hardware devices or software devices such as the YateClient softphone. We’ll start with a free one today so you can begin making calls. You can find dozens of recommendations for hardware-based SIP phones both on Nerd Vittles and the PIAF Forum when you’re ready to get serious about VoIP telephony.

We recommend YateClient which is free. Download it from here. Run YateClient once you’ve installed it and enter the credentials for the 701 extension on Incredible PBX. You can find them by running /root/show-passwords. You’ll need the IP address of your server plus your extension 701 password. In the YateClient, fill in the blanks using the IP address of your Server, 701 for your Username, and whatever Password was assigned to the extension when you installed Incredible PBX. Click OK to save your entries.

Once you are registered to extension 701, close the Account window. Then click on YATE’s Telephony Tab and place some test calls to the numerous apps that are preconfigured on Incredible PBX. Dial a few of these to get started:

DEMO - Apps Demo
123 - Reminders
947 - Weather by ZIP Code
951 - Yahoo News
TODAY - Today in History
LENNY - The Telemarketer's Worst Nightmare

If you are a Mac user, another great no-frills softphone is Telephone. Just download and install it from the Mac App Store.

Only if you experience one-way or no audio on some calls, add your external IP address and LAN subnet in the GUI by navigating to Settings -> Asterisk SIP Settings. In the NAT Settings section, click Detect Network Settings. Click Submit and Apply Settings to save your changes.

Most Raspberry Pi implementations will be on networks managed by companies like Comcast, Spectrum, and AT&T that block downstream mail servers (that’s you) from sending email. The solution is to use Gmail or your local ISP as a smart relay host to send mail from your server. You’ll need this to deliver voicemails via email. Here’s how to set it up using a Gmail account without two-step authentication. Log into your server as root and run configure-exim-email. Choose "mail sent by smarthost; received via SMTP or fetchmail." Accept all the defaults until you get to Outgoing Smarthost prompt. Enter: smtp.gmail.com::587. At the following prompts, choose NO, NO, mbox, and NO. When the setup completes, edit /etc/exim4/passwd.client and insert the following line using your Gmail AcctName and AcctPW:

*.google.com:AcctName@gmail.com:AcctPW
smtp.gmail.com:AcctName@gmail.com:AcctPW

Save the file and then issue the following commands to complete the setup:

update-exim4.conf
systemctl restart exim4
exim4 -qff

Now send yourself a test email message to make sure things are working properly:

echo "test" | mail -s testmessage yourname@yourmailprovider.com

Some prefer an email notification whenever your server is booted. Once you have configured a relay host above, you can add the feature by editing /etc/rc.local and adding the following lines with your actual email address just above the service knockd start line:

_PRIVATE="Private IP: `cat /etc/hostip | cut -f1-2 -d " "`"
_PUBLIC=" Public IP: `curl -s -S --user-agent \\
"Mozilla/4.0" http://myip.incrediblepbx.com | awk 'NR==2'`"
echo "$_PRIVATE\\n$_PUBLIC" | mail -s "RasPi 16-15 has booted" yourname@yourmailserver.com

We’ve eased the pain of administering your new PBX with a collection of scripts which you will find in the /root folder after logging in with SSH or Putty. Here’s a quick summary of what each of the scripts does.

admin-pw-change lets you update the admin password for web browser access to the Incredible PBX GUI.

apache-pw-change lets you update the admin password for Apache applications such as AsteriDex and Reminders.

avantfax-pw-change lets you update the root password for AvantFax access (coming soon!).

add-fqdn is used to whitelist a fully-qualified domain name in the firewall. Because Incredible PBX 16-15 blocks all traffic from IP addresses that are not whitelisted, this is what you use to authorize an external user for your PBX. The advantage of an FQDN is that you can use a dynamic DNS service to automatically update the IP address associated with an FQDN so that you never lose connectivity.

add-ip is used to whitelist a public IP address in the firewall. See the add-fqdn explanation as to why this matters.

del-acct is used to remove an IP address or FQDN from the firewall’s whitelist.

configure-exim-email lets you reconfigure the email server if you need to use an SMTP relay such as Google to get outbound email flowing. Tutorial here.

iptables-restart is the ONLY command you should ever use to restart the IPtables firewall and Fail2Ban.

knock.FAQ contains your PortKnocker credentials for emergency access to your server if the firewall locks you out. Tutorial here.

proximity (once configured) will automatically forward calls to your cellphone when you are out of BlueTooth range from your RasPi. Also must enable running of script in /etc/crontab.

reset-conference-pins is a script that automatically and randomly resets the user and admin pins for access to the preconfigured conferencing application. Dial C-O-N-F from any registered SIP phone to connect to the conference.

reset-extension-passwords is a script that automatically and randomly resets ALL of the SIP passwords for extensions 701-705. Be careful using this one, or you may disable existing registered phones and cause Fail2Ban to blacklist the IP addresses of those users. HINT: You can place a call to the Ring Group associated with all five extensions by dialing 777.

reset-reminders-pin is a script that automatically and randomly resets the pin required to access the Telephone Reminders application by dialing 123. It’s important to protect this application because a nefarious user could set up a reminder to call a number anywhere in the world assuming your SIP provider’s account was configured to allow such calls.

show-feature-codes is a cheat sheet for all of the feature codes which can be dialed from any registered SIP phone. It documents how powerful a platform Incredible PBX 16-15 actually is. A similar listing is available in the GUI at Admin -> Feature Codes.

show-passwords is a script that displays ALL of the passwords associated with Incredible PBX 16-15. This includes SIP extension passwords, voicemail pins, conference pins, telephone reminders pin, and your Anveo Direct outbound calling pin (if configured). Note that voicemail pins are configured by the user of a SIP extension the first time the user accesses the voicemail system by dialing *97.

timezone-setup lets you reconfigure the correct time zone for your server.

purge-cdr-cel-records cleans out all existing entries in both the CDR and CEL tables of the Asterisk CDR database.

log-cleanup removes all entries from most of the logs in /var/log.

sig-fix disables module signature checking in FreePBX. It is automatically disabled upon installation.

readme-RonR.txt documents the scripts provided from RonR build. We do NOT recommend using the FCC Blacklist because of its current size.

update-IncrediblePBX is the Automatic Update Utility which checks for server updates from incrediblepbx.com every time you log into your server as root using SSH or Putty. Do NOT disable it as it is used to load important fixes and security updates when necessary. We recommend logging into your server at least once a week.

pbxstatus (shown above) displays status of all major components of Incredible PBX 16-15.

Forwarding Calls to Your Cellphone. Keep in mind that inbound calls to your DIDs automatically ring all five SIP extensions, 701-705. The easiest way to also ring your cellphone is to set one of these five extensions to forward incoming calls to your cellphone. After logging into your PBX as root, issue the following command to forward calls from extension 705 to your cellphone: asterisk -rx "database put CF 705 6781234567"

To remove call forwarding: asterisk -rx "database del CF 705"

For each release, we will post fixes for Incredible PBX 16-15 here. If you download a newer release, previous fixes have already been addressed and should not be applied. If you’re still using an earlier release, be sure to apply all patches for your release plus all patches for subsequent releases.

Release 1 Fixes:

Login to your server as root and issue the following commands to update your server. A reboot is not required unless noted.

service knockd start
sed -i 's|exit 0"|exit zero"|' /etc/rc.local
sed -i 's|exit 0|service knockd start\\nexit 0|' /etc/rc.local
/root/reset-extension-passwords

A glitch in the admin-pw-change utility used to set the password for web access to the GUI has also been fixed. Simply log out of your server and log back in as root, and the Automatic Update Utility will fix the problem. You then can successfully set your admin password.

Release 2 Fixes:

# failed exim messages from Fail2Ban
sed -i 's|/dev/null|:blackhole:|' /etc/aliases
systemctl restart exim4
exim -bp | exiqgrep -i | xargs exim -Mrm
systemctl restart fail2ban
# missing AGI files
cd /var/lib/asterisk/agi-bin
wget http://incrediblepbx.com/raspi1615-agibin.tar.gz
tar zxvf raspi1615-agibin.tar.gz
rm -f raspi1615-agibin.tar.gz

Release 3 Updates/Fixes:

Release 3 adds dozens of Incredible PBX applications. See the Application User’s Guide for tutorials. In addition, release 3 adds MySQL ODBC support (special thanks to @jerrm for sorting this out) with demo Asterisk applications for customer lookups (dial 222 and enter 12345) and AsteriDex speed dials (dial 223 and enter 335 (D-E-L) for Delta Airlines.

Release 4 Updates/Fixes:

Release 4 adds Allison’s Demo IVR and Stealth AutoAttendant as well as support for Blinkt!. It provides hourly alerts during the workday as well as whenever pbxstatus is run. You can order one here. This brings us to functional equivalence with the CentOS 7 release of Incredible PBX 16-15.

Release 5 Updates/Fixes:

Release 5 sets NAT default setting for all extensions to YES. This reduces the likelihood that callers will experience one-way audio on calls. The size of the swap file also was double to eliminate dashboard warning messages when some larger microSD cards were deployed.

Continue Reading: Icing on the Cake for Incredible PBX 16-15 and Raspberry Pi

Originally published: Wednesday, August 7, 2019

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Special Thanks to Vitelity. Vitelity is now Voyant Communications and has halted new registrations for the time being. Our special thanks to Vitelity for their unwavering financial support over many years and to the many Nerd Vittles readers who continue to enjoy the benefits of their service offerings. We will keep everyone posted on further developments.