Must because you're in Australia. From Canada on a good connection, I get a 90 ms round-trip ping to voxalot.com and a 224 ms round-trip ping to voxalot.com.au!

Okay, so that mucks up my dial plans. I have to cater for all six digit numbers and 'assume' they are voxalot member numbers....

Is there is special rules that need to be met for a voxalot member number?
- ie cannot start with a zero, must be exactly 6 numbers in length, anything else?

Just that they cannot start with a zero and must be exactly 6 numbers in length.

Perhaps it would be a very good idea to not allow them to start with 13 either, due to the 6 digit 13 number in Australia.

I registered voxalot.com.au as a provider when I could, but another member wants to also register voxalot.com.au and he can't -- he has the same problem that I had with voxalot.com and sipbroker.com

Martin, can you please allow everyone to be able to add voxalot.com, voxalot.com.au and sipbroker.com as providers?

Or perhaps make each of these fully available for dial plan use.

sipbroker.com, voxalot.com and now voxalot.com.au are explicitly blocked in provider registration.

The reason for this is because:

1. sipbroker.com is accessible using * prefix
2. voxalot.com and voxalot.com.au are reachable by dialling 3 digit or 6 digit numbers.

Eventually we plan to make both SIP broker and VoXaLot as entries in the dial plan, however right now we dont see the urgency unless convinced otherwise.

Yes but only _[56]00 for now as 3 digit numbers, will more of these be added?

As for the 6 digit numbers, can you confirm that none start with 13 now and make a new rule to stop any future accounts from starting with 13? Ditto for 18, but these are 10 digit numbers in Australia, so they might not be so important to block.

I don't understand why a restriction can be considered necessary, why might it be a problem?

Possibly yes

No. 13 and 18 numbers are possible

We want to pre-empt uncontrolled cyclic reference. ie. infinite loops etc. We plan to add support for explixit SIP Broker and VoXaLot at a future date but in a controlled way.

Can you not see any problem with 6 digit 13 numbers? I know that ATAs can often have their own dial plans so these to go to the PSTN line if the ATA has an FXO port.

There will be a problem calling 13 xx xx voxalot numbers when there is a possibility of a 'normal' PSTN 13 xx xx number. You can't setup dial plans to cater for this.... [Edit: unless you know specifcally which 13 xx xx numbers are meant to go where]

Yes your points are very valid. That's why we have on our to-do list adding SIP Broker and VoXaLot to dial plans. As with most things just takes time to get it in.