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28431 posts

Uber Geek

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  # 1386495 13-Sep-2015 09:19
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Our of curiosity why did you decide to deploy a FreePBX install with no knowledge of VoIP?

You really need to be understanding what you're doing, and more importantly what the settings mean. Having gsm as a codec for example has the potential to break lots of things as most devices doesn't support it and unless you have a very specific low bandwidth requirement with hardware that supports it I'm not sure why you'd want to use it.

 



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  # 1386546 13-Sep-2015 11:05
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Right checked the SIP Setting on FreePBX and set NAT to "no" The result is still the same. I am confident the Codecs are sufficient but will need to check on that. Think we will need to do diagnostics with CallPlus because currently they have my trunk numbers diverted to cellphone so as not to lose incoming calls. I have a fairly OK diagram of the arrangement here showing the setup but posting PDF here does not seem straight forward.

CallPlus NAT off?
What is the External Address for the PBX
Can CallPlus see 10.38.23.125?
Are Ports OK?
What Codecs?
What about the telephone number diversion

 
 
 
 


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  # 1386602 13-Sep-2015 11:54
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There is no need to worry about NAT if you are connecting directly to the Callplus proxy. Nor is there a need to know any public addresses.

I would suggest running a packet capture (tcpdump) and see what is actually being sent in the invites and sdp. That will tell you quite quickly what is going wrong.



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  # 1386625 13-Sep-2015 13:42
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Sure thank you, I understand the NAT thing - As suggested it may be time for Wireshark. The FreePBX has two networks, I wish to ensure the trunk communication is bound to the VLAN. My thinking to specifying the remote destination IP / Network (External address) will enable the PBX to use the correct route and engage the VLAN. The Asterisk SIP settings ask for this information so it makes sense to me to find out what that IP may be. Task for tomorrow. 



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  # 1386628 13-Sep-2015 13:56
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  # 1387498 14-Sep-2015 21:20
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I have resolved the issue, all the trunks now working etc – Just need to get CallPlus to turn the redirects off the phone numbers. Yes it was a small thing. It appears to be a valid gateway entry on one of the FreePBX VLANs. I removed it and the trunking sprang to life. I am not sure why it held pre-eminence over the local LAN gateway configuration. May be someone could enlighten me on this?

 

  • CallPlus answered all my queries:
  • NAT off - Yes but not for the Internet route
  • What is the External Address for the PBX - For this I used the CallPlus internet static IP
  • Can CallPlus see 10.38.23.125 - Yes there system could communicate
  • Are Ports OK - Yes
  • What Codecs - ulaw, alaw they also support g729 all of which FreePBX had in play
  • What about the telephone number diversion - Not an issue for outbound testing

Thank you to those who responded constructively.

28431 posts

Uber Geek

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Biddle Corp
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  # 1387502 14-Sep-2015 21:29
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FreePBX does not support G.729 unless you've paid for and installed a licence.

Like GSM there is absolutely no reason to have this enabled in your settings as it will simply cause you grief.





 
 
 
 




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  # 1387509 14-Sep-2015 21:34
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Noted sbiddle - Thank you.

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