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501 NOT IMPLEMENTED
* Thread starter MattJames
* Start date Feb 23, 2022
Status Not open for further replies.
MATTJAMES
Gold Partner
Advanced Certified
Joined Sep 23, 2021 Messages 10 Reaction score 0
* Feb 23, 2022
*
* #1
I have a client who is attempting to make international calls and getting this
error message in the dashboard "Call or Registration to
XXXXXXXXX@(Ln.XXXXX@XXXXXXX) has failed. XXX.XXX.XXX.XXX replied: 501 Not
Implemented; from IP:XXX.XXX.XXX.XXX:5060"
I have confirmed the system has the checkbox to allow calls to the country in
question checked, and that the SIP trunk supports calls to the location as well.
The phone works fine for local calls, and inter-state, just not international.
The system is on 3CX 18.0 Update 2 (Build 307), the server is a windows cloud
server and calls are being made via the Windows App.
It appears the issue started with the upgrade to version 18 - everything worked
fine under version 16.
Any suggestions would be appreciated.
SAQQARA
Bronze Partner
Basic Certified
Joined Mar 12, 2014 Messages 4,774 Reaction score 1,467
* Feb 23, 2022
*
* #2
The error does shown the correct international format required by the sip
provider ?
Check your e164 settings
MATTJAMES
Gold Partner
Advanced Certified
Joined Sep 23, 2021 Messages 10 Reaction score 0
* Feb 23, 2022
*
* #3
> Saqqara said:
> The error does shown the correct international format required by the sip
> provider ?
>
> Check your e164 settings
> Click to expand...
We have e164 turned off at the moment and use outbound rules to strip "+" and
add "00"
The setup is a little complicated in that is has SIP Trunks for two different
countries - one Australian SIP Trunk, and one New Zealand SIP Trunk - typically
calls to New Zealand numbers are routed through the NZ trunk and vice versa.
I can see the calls are trying going out as "00XX XXXX XXXX" but still getting
the same messaged
LEEJOR
Customer
Joined Jan 22, 2008 Messages 16,373 Reaction score 1,565
* Feb 23, 2022
*
* #4
...and you are getting the same message, on call to either trunks? Are they
different providers?
If you are using ,as an example, the New Zealand trunk, is it necessary to dial
two zeros ahead of the number, or just one? Are numbers to be dialed as if you
are dialing within the country (single leading zero, no country code)?
> MattJames said:
> 501 Not Implemented; from IP:XXX.XXX.XXX.XXX:5060"
> Click to expand...
I assume that the X'd out IP is that of one of the providers?
YIANNISH_3CX
SUPPORT TEAM
Staff member
3CX Support
Joined May 10, 2016 Messages 11,467 Reaction score 1,545
* Feb 23, 2022
*
* #5
501 Not Implemented is usually a provider error indicating that calls to that
destination cannot be completed or a routing issue between them and the upstream
providers. It could also be that your account does not allow for international
calls. Some providers charge that extra and by default is off for security
reasons. If the error is coming from your provider then you need to speak with
them first before making any changes to 3CX.
MATTJAMES
Gold Partner
Advanced Certified
Joined Sep 23, 2021 Messages 10 Reaction score 0
* Feb 23, 2022
*
* #6
> YiannisH_3CX said:
> 501 Not Implemented is usually a provider error indicating that calls to that
> destination cannot be completed or a routing issue between them and the
> upstream providers. It could also be that your account does not allow for
> international calls. Some providers charge that extra and by default is off
> for security reasons. If the error is coming from your provider then you need
> to speak with them first before making any changes to 3CX.
> Click to expand...
This was the first thing I checked - provider confirmed that the trunk allows
it, and that it is unblocked.
MATTJAMES
Gold Partner
Advanced Certified
Joined Sep 23, 2021 Messages 10 Reaction score 0
* Feb 23, 2022
*
* #7
> leejor said:
> ...and you are getting the same message, on call to either trunks? Are they
> different providers?
>
> If you are using ,as an example, the New Zealand trunk, is it necessary to
> dial two zeros ahead of the number, or just one? Are numbers to be dialed as
> if you are dialing within the country (single leading zero, no country code)?
>
>
>
> I assume that the X'd out IP is that of one of the providers?
> Click to expand...
We have tried with the leading zero (i,e NZ call internally) and with the 00 (so
international call) - we have tested on both trunks this morning - it appears
the AUS trunk is working the NZ is not.
And, yes, the is the provider's IP.
COBALTIT
Platinum Partner
Advanced Certified
Joined Mar 22, 2012 Messages 6,740 Reaction score 2,323
* Feb 24, 2022
*
* #8
Again, the provider is rejecting it, not 3CX. Have the provider tell you
SPECIFICALLY why they are rejecting it so you can make adjustments in 3CX. Tell
you it should work or that it is supported isn't going to get you anywhere.
Toggle signature
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MATTJAMES
Gold Partner
Advanced Certified
Joined Sep 23, 2021 Messages 10 Reaction score 0
* Feb 24, 2022
*
* #9
> cobaltit said:
> Again, the provider is rejecting it, not 3CX. Have the provider tell you
> SPECIFICALLY why they are rejecting it so you can make adjustments in 3CX.
> Tell you it should work or that it is supported isn't going to get you
> anywhere.
> Click to expand...
As i mentioned above - I went to the provider. I supplied the logs I have above
showing the attempted calls etc. The calls never made it to their servers - they
have checked the calls are not being blocked by them.
I asked them very specifically if they are blocking them... they said they are
not. They cannot even see the calls attempting to connect.
COBALTIT
Platinum Partner
Advanced Certified
Joined Mar 22, 2012 Messages 6,740 Reaction score 2,323
* Feb 24, 2022
*
* #10
So do a capture and send them the wireshark. The rejection is happening from
that IP. They are probably being dumb and looking at their SIP servers which
wouldn't show attempts if it's being rejected by their SBC. They may not trust
3CX logs or know what 3CX is if it's not a supported provider but they should
trust a wireshark capture
Toggle signature
3CX Platinum Partner & 3CX Supported SIP Trunk Provider
Find my posts helpful? Feel free to make Cobalt IT your partner. Enter 217155 in
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Vote for these ideas! More RPS Control | Beep Optional in Ring Group | Multicast
Page Relay | Add protocol option in phone provisioning
*
Reactions: NickD_3CX and YiannisH_3CX
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