The extensions DDI number is being forwarded because the LID setting for the route, is either 1 or 2.
To stop the DN information being transmitted, so only the main number is shown, LID needs to be set to 0 (ZERO).
For DASS/ISDN30 type ccts:
Print out the RDB (Route Data Block) using overlay LD 21 and check the LID setting.
It can be changed using LD 16. Once is it set to 0, the billing number only will be sent in the CLI.
For ISDN30E type ccts, also known as EURO or ETSI:
If under ISDN you see the following, highlighted in red.
* Denotes Euro ISDN
To stop the DDI extension number going out and to send only the main number then a check of the CDB (Customer Data Block) is required as follows:
Press return (twice) until data is output
CLID sending extn DDI instead of main switch number.
The solution to this problem is to change CDB, under NET_DATA and then CLID YES look for DIDN prompt and set to NO.
This will then follow HLCL prompt and will only send the main site number.
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