Yealink T48S - Help Needed

[thereverendd]

I am remotely provisioning a T48S, It shows in 3cx as
SIP Server/Call Manager ID: 4101
Extension 425 is registered, contact: sip:[email protected]:5065, received from: xx.xxx.xx.xx

But.. on the phone itself the phone says NO SERVICE and the Green phone next to the line is blinking.. It appears to have remotely provisioned as there is now a 3cx screen saver on the phone
but when I go to make a call the phone gives an error that says "Invalid Account" can someone please help. Thank you in advance.

 

[thereverendd]

Ok wanted to update everyone about this..

I did some digging while waiting for a reply here.. It seems that 100% the problem with this phone
was the WRONG firmware.. I can not believe that I overlooked this but.. If you have this problem. Please
be sure to check your firmware and upgrade as needed..

That part is SOLVED but I have another problem.. AFTER about 30 seconds
the phone disconnects the ALL calls .. anyone help with this part too?

 

[thereverendd]

This is ONLY on OUTGOING calls.. Sorry I said ALL

 

[AWS2P]

you have only one T48S set in STUN mode ?

 

[thereverendd]

At this time YES.. but I do have 2 phones at the remote location. This T48S is replacing a Cisco 303 that I had, the Cisco 303 worked 100% no issues.

 

[AWS2P]

incoming calls are working properly ? do you have audio both ways? what happens if you dial *777 and speak? do you hear you back ?
did you follow 3CX guide to set the phone in STUN ?
did you ticked "pbx delivers audio"

Do you have an error message when dialing out?
Did you set log in verbose and see what can be found interesting in?

 

[thereverendd]

Did the *777 and yes I hear myself and when calling myself on my cell I hear myself both ways.
as well. I followed the the steps on provisioning the phone but can you clarify the "Set the phone is STUN"
so I can make sure I have done that on the phone as well. Thanks again

 

[AWS2P]

is your T48S on same LAN as PBX ? or on another location?

 

[AWS2P]

If stun, untick 'Disallow use of extension outside the LAN (Remote extensions using Direct SIP or STUN will be blocked)' under options

Have you followed this guide , and see limitations at the end
https://www.3cx.com/sip-phones/yealink-t4-series/

 

[thereverendd]

The T48S is not in the same location as the 3cx pbx and the option is unticked

 

[AWS2P]

Did you set a static ip to the phone ?
Did you NAT all needed ports on phone location firewall?

 

[AWS2P]

in future if you need to add new phones , you should use an SBC instead of STUN, no pain with settings ans provisionning, new phones are seen in console as they were local

 

[AWS2P]

What is your problem with outgoing calls? do you have forbidden message?
Is your extension part of an outbound rule?

 

[thereverendd]

Did you set a static ip to the phone ?
Did you NAT all needed ports on phone location firewall?

I did not have a static IP on the cisco phones so i did not think I would need one on this phone, Also what ports should I forward to the phone and why would that be the case if I can make 30 second calls then it quits?

 

[thereverendd]

I see this in the Activity LOG

"02/24/2020 6:55:36 PM - [CM503021]: Call(C:30): ACK is not received from sip:[email protected].3cx.us:5060 "

 

[thereverendd]

I went into my router and had to go to NAT FILTERING and CHECK "Disable SIP ALG"
and make NAT filtering OPEN and now it appears to be working



Thank you guys for all the help!