Knowledge base DDI setup
In some number ranges (e.g. 033) we offer DDI (direct dial in) blocks. These are blocks of 10, 100, 1000 or even 10000 numbers routed to one destination. You could have several blocks.
To manage the blocks each block has a single entry in our control pages with an X where any digit can be. e.g. 0123456789X for a block of 10, or 012345678XX for a block of 100. This allows you to control where the numbers are sent (e.g. SIP, IAX, H.323). Incoming calls to any of the numbers is delivered as per this setting.
To make outgoing calls you can use a SIP or IAX authenticated login using the number (with the X in it) as the login, and the password you set. This is just the same as using single numbers. One difference is that you can set the CLI (calling number) to any of the numbers in the block. If you set the CLI to one of the numbers then that is what is used. If you do not set the CLI or set an invalid one then the number using 0 instead of X is used. If you have a presentation number then this is used instead when you do not set a CLI. This means you can chose to use any of your numbers, or a presentation number if you have one, on a per call basis from your own phone system.
Billing appears against one billing number (the number with X's in it). The calling number shows on the bill.
We can arrange for individual numbers to have their own entry even when within a block. In this case you pay for the block and also for the individual numbers you have chosen. The individual numbers can have their own management and billing as normal and are effectively removed from the block. The exception is that they can still be used as a CLI when calling using the block login. This can be useful where most numbers are handled by your phone systems but you need some specific exceptions handled differently.