FPL supports 2 channels. There can be a maximum of two active calls per FPL account.
Each call can last a maximum of 3 hours.
If two calls haven't disconnected because BYE hasn't been received or processed properly somewhere along the path, then you wouldn't be able to make more calls.
Also, if someone else or another device is using your FPL account, then that could also cause problems.
Go through this list, please, step by step, and provide requested information:
1. What is the brand and model of the modem provided by or used with your ISP?
a) If you're using a modem/router combo, gateway, or hub issued by your ISP (and are NOT using your own additional separate router), contact your ISP to ask for assistance for disabling SIP ALG in the modem/router combo, gateway, or hub. Disable SIP ALG.
Here are two examples for disabling SIP ALG in gateways:
i)
Hitron CGN3ACSMR and CODA-4582 series gateway modem/router combo from Rogers (and possibly other ISPs)
Open your web browser, and login at 192.168.0.1. Default username is cusadmin.
Select the “Basic” tab and disable “SIP ALG.” Click the “save changes” button.
ii)
Arris XB6 from Rogers
Open your web browser, and login at 192.168. 0.1
Navigate to Advanced-->Options.
Uncheck the SIP box.
Click "Apply".
2. What is the brand and model of your router? If you are also using your own separate router in addition to the one supplied by your ISP, then you should be enabling bridge mode instead in the modem/router combo, gateway, or hub issued by your ISP.
For Bell Hubs, visit
http://forums.redflagdeals.com/please-s ... r-1993629/. For Bell and Virgin Hubs, I find it's often simpler to perform PPPoE login in your own router (this is PPPoE Passthrough) and disable Wi-Fi in the hub. You will need the PPPoE Username and Password from Bell or Virgin.
For Rogers, visit
https://www.rogers.com/customer/support ... ridgemodem.
Shaw users will have to call Shaw to enable bridge mode at the time of this post.
For Telus Wi-Fi Hubs, put LAN port 1 on the Hub in bridge mode. Then connect your router to LAN port 1.
Alternatively, contact Telus and ask them how to enable bridge mode.
3. Disable SIP ALG in your own separate router if you own one. Here is an example:
https://www.obitalk.com/info/faq/sip-alg/disable-alg.
In Asus routers, SIP ALG is called SIP Passthrough. In Asuswrt-Merlin, the ALG is "+NAT Helper". Just make sure SIP Passthrough in Merlin does not show "+NAT Helper".
4. Don't use DMZ and don't port forward in your router. Both are security risks. Only port forward if you have no other choice.
5. Are you using any other SIP devices (smartphone app, FPL desktop app) other than your Linksys PAP2?
6. Are you sharing your FPL account with anyone?
7. Which proxy server is your ATA registered with? voip.freephoneline.ca, voip2.freephoneline.ca, or voip4.freephoneline.ca:6060?
8. Log into your ATA (switch to "advanced view")
Under Voice-->User 1 and User 2 (both of these)
Check Call Forward Settings
a) Cfwd All Dest:
That field should be blank. If there's a phone number there you don't recognize, you were hacked.
Make that field blank.
b) Cfwd Busy Dest
That field should be blank. If there's a phone number there you don't recognize, you were hacked.
Make that field blank.
c) Cfwd No Ans Dest
That field should be blank. If there's a phone number there you don't recognize, you were hacked.
Make that field blank.
9. Navigate to "Info"-->Line 1 status and Line 2 status in your ATA
Check call 1 and call 2 state
What is their state?
10. When you check your call logs, are you seeing calls that you don't recognize?
If so, someone else is using your FPL account.
Login at
https://www.freephoneline.ca/doGetCallLogs.
Select current month, and click the submit button.
11. Login at
https://www.freephoneline.ca/showSipSettings
SIP Status should show connected
If you don't recognize the device listed for SIP User Agent, you've been hacked. In that case, someone else would be using your Freephoneline account.
12. While you're troubleshooting this problem, keep "Follow Me" disabled. Login at
https://www.freephoneline.ca/followMeSettings.
By the way, when there are multiple devices/softphones/lines using the same FPL account, only the most recent registration is valid. The previous device will lose registration, and, consequently, incoming calls will not work on it. This is especially important to consider if someone else is using your SIP credentials (username and password) that are found after logging in at
https://www.freephoneline.ca/showSipSettings or if you're trying to register your FPL account with a smartphone SIP app (or FPL desktop app) or with another device. Registration is required for incoming calls. It is not required for outgoing calls. Only one registration per FPL account is allowed at any time. A single line on an ATA is one registration. A SIP app is another. A more significant concern, though, is that multiple registration attempts can lead to temporary IP bans. The more devices being used with the exact same FPL account can make the temporary ban happen more quickly. Each time you reboot or restart your ATA or a SIP app, it's attempting to register with Freephoneline again. Multiple registration attempts within a short period can result in temporary IP ban with the proxy server being used.