[Resolved] problem with incoming (FPL/Fongo to FPL) calls

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[Resolved] problem with incoming (FPL/Fongo to FPL) calls

Postby zimagold » 09/13/2021

This started a few months ago now. My FPL account can make calls, but it can't receive calls from another FPL or Fongo number. It can receive calls from regular landline or cell phone numbers. If I try to call from a Fongo or FPL number, it just goes to voicemail. The fact that I can receive calls from a regular line seems to suggest that my configuration is okay. This behaviour is the same whether I use my ATA (Linksys PAP2) or a soft phone (Sipnetics)

Can anyone shed some light on this? I have multiple FPL accounts and they're all having this same problem. Thanks. A
zimagold
Just Passing Thru
 
Posts: 2
Joined: 11/05/2015

Re: Strange problem with incoming calls

Postby Liptonbrisk » 09/16/2021

FPL to FPL calls are treated as SIP URI calls, unlike other calls. The problem can be on the other end. I have no problem calling or receiving calls from family members who use FPL.

The problem could be on the other end of the call (ask if they have SIP ALG enabled in their routers; if so, ask them to disable SIP ALG or use voip4.freephoneline.ca:6060 to see if that makes a difference).
To understand why SIP ALG often causes horrible problems, please visit https://www.voip-info.org/routers-sip-alg/ (scroll down to the section on SIP ALG problems).

There have been SPA/PAP ATA users reporting issues when trying to make anonymous outgoing calls to certain numbers (refer to steps 3 and 4 below).

If someone did block your FPL number (could be done in the user's handset by mistake), the outgoing call to that person will drop directly to voicemail. The same will happen if their device is unregistered or offline.

Follow the steps, step by step, down the list, and provide information when requested, please.

1. What brand and model modem are you using?
Click viewtopic.php?f=8&t=20199, go through the steps, and provide the requested information, please.

2. What brand and model router are you using?
Click viewtopic.php?f=8&t=20199, go through the steps, and provide the requested information, please.

If anyone has issued a modem/router combo by their ISP and are also using their own router, ensure the modem/router combo is in bridge mode, and disable SIP ALG in the other router.
If they only have a modem/router combo, gateway, or hub, ensure SIP ALG is disabled in it.

Alternatively, use voip4.freephoneline.ca:6060 in ATAs or IP Phones to help circumvent SIP ALG. The other end of the call may need to do this as well.

3. Check to see whether you've accidentally enabled Caller ID block on your ATA. Dial *68 to remove caller ID blocking on all outbound calls.
Don't use "Anonymous" for display name in your ATA. Don't use or accidentally dial *67.


4. In your ATA, navigate to Voice-->Line (whichever you use for FPL)-->Supplementary Service Subscription-->Block CID Serv:
a) change to no
b) Click "submit"

5. When you login at https://www.freephoneline.ca/doGetCallLogs, select the month, and click "submit", are the failed outgoing calls listed?
a) If so, what does the disconnect reason state?


6. Login to your ATA. Specify a high random SIP port in your ATA between 30000 and 60000.
Navigate to Voice-->Line 1 (or whatever you're using for FPL)-->SIP settings, change SIP Port to a random number between 30000 and 60000.
Do not use the same random SIP port for any other Line. Always choose a different random local SIP port for each Line you're using.

Using a high random SIP port may help to bypass SIP ALG, and it also helps to avoid SIP Scanners (or hackers).
Also, changing local SIP port will reset a potential corrupted NAT association that developed between your router and ATA.

7. In your PAP2T, Navigate to the SIP tab-->NAT Support Parameters, and make sure that the following settings are enabled:

a)Handle VIA received-->yes
b)Handle VIA rport-->yes
c)Substitute VIA Addr-->yes

This helps to ensure RTP (the streaming audio packets sent by FPL's server) packets are sent to your public WAN IP address as opposed to your LAN IP address (nowhere/outer space).

d) NAT Keep Alive Intvl needs to be 20

8. Navigate to Voice-->Line (whichever you use for FPL)-->NAT settings
a) NAT Mapping Enable should be yes
b) NAT Keep Alive Enable should be yes
c) NAT Keep Alive Msg should be $NOTIFY

d) click "Save Settings" button if changes were made

9. This step is not related to your issue.
Navigate to Voice-->SIP-->SIP Timer Values (sec)
Reg Retry Intvl should be 120 seconds

Click "Save Settings" button if changes were made

https://support.freephoneline.ca/hc/en- ... redentials

Many older guides for FPL don't include this setting.

10. Proper device reboot order is always modem (wait for it to be fully up before turning on your)-->router (ensure Wi-Fi SSIDs are populated first on your devices)-->ATA (wait for router to be fully up and running before turning on ATA). That's always proper device reboot order. Reboot your devices now.
Please do not send me emails; I do not work for nor represent Freephoneline or Fongo. Post questions on the forums so that others may learn from responses or assist you. Thank you. If you have an issue with your account or have a billing issue, submit a ticket here: https://support.fongo.com/hc/en-us/requests/new. Visit http://status.fongo.com/ to check FPL/Fongo service status. Freephoneline setup guides can be found at viewforum.php?f=15.
User avatar
Liptonbrisk
Technical Support
 
Posts: 1860
Joined: 04/26/2010
SIP Device Name: OBi202
Firmware Version: 3.2.2 (Build:8680EX)
ISP Name: Cable
Computer OS: Windows 10 x64 Pro
Router: Asuswrt-Merlin

Re: Strange problem with incoming calls

Postby Liptonbrisk » 09/16/2021

You can also see here where another user resolved their FPL to FPL issue by disabling SIP ALG in the router at the other end of the call and by changing to a random SIP Port as mentioned in step 6 above:
viewtopic.php?f=8&t=19773#p77307.

The problem can be a configuration issue at the other end of the call.
Please do not send me emails; I do not work for nor represent Freephoneline or Fongo. Post questions on the forums so that others may learn from responses or assist you. Thank you. If you have an issue with your account or have a billing issue, submit a ticket here: https://support.fongo.com/hc/en-us/requests/new. Visit http://status.fongo.com/ to check FPL/Fongo service status. Freephoneline setup guides can be found at viewforum.php?f=15.
User avatar
Liptonbrisk
Technical Support
 
Posts: 1860
Joined: 04/26/2010
SIP Device Name: OBi202
Firmware Version: 3.2.2 (Build:8680EX)
ISP Name: Cable
Computer OS: Windows 10 x64 Pro
Router: Asuswrt-Merlin

Re: Strange problem with incoming (FPL/Fongo to FPL) calls

Postby zimagold » 09/26/2021

Thank you. Disabling SIP ALG on the router solved the issue.
zimagold
Just Passing Thru
 
Posts: 2
Joined: 11/05/2015

Re: Strange problem with incoming (FPL/Fongo to FPL) calls

Postby Liptonbrisk » 09/26/2021

Thank you for reporting back!
Please do not send me emails; I do not work for nor represent Freephoneline or Fongo. Post questions on the forums so that others may learn from responses or assist you. Thank you. If you have an issue with your account or have a billing issue, submit a ticket here: https://support.fongo.com/hc/en-us/requests/new. Visit http://status.fongo.com/ to check FPL/Fongo service status. Freephoneline setup guides can be found at viewforum.php?f=15.
User avatar
Liptonbrisk
Technical Support
 
Posts: 1860
Joined: 04/26/2010
SIP Device Name: OBi202
Firmware Version: 3.2.2 (Build:8680EX)
ISP Name: Cable
Computer OS: Windows 10 x64 Pro
Router: Asuswrt-Merlin


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