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How many telephone numbers can I have with ISDN30 & 30e? | BT Business
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How many telephone numbers can I have with ISDN30 & 30e?

You can have an unlimited number of DDI numbers, allowing customers and business contacts to dial directly through to staff members, without passing through a switchboard.

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Using ISDN30/30e

Find out more information on ISDN30/30e and the features it has including alternative and diverse routing, customer and admin controlled call forwarding and diversion, maintenance and resilience options and Business Continuity.

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