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BT ISDN 30 Business Continuity

Alternative and diverse routing

Alternative routing provides two different cables from the local exchange to your site, so you can protect against cable failure as your service will be maintained on the alternative route.

Furthermore, with diverse routing, you can protect not only against cable failure but also against local exchange failure as there are two separate routes from two exchanges to your site.

How alternative routing works:

Alternative RoutingAlternative Routing

ISPBX is your telephone system

How Diverse Routing works:

Diverse RoutingDiverse Routing

ISPBX is your telephone system

ISDN30 site assurance

There are two options available as part of the site assurance service:

  • Option 1 using existing ISDN30 basic diversion services so all incoming calls can be redirected to a single, pre-arranged number
  • Option 2 which sets up a group of ISDN30 channels to a standby site which are taken out of service when not used

How option 2 works:

Site Assurance Option2Site Assurance Option2

ISPBX is your telephone system

DDI dual parenting

Dual parenting enables direct dial in (DDI) to continue operating if your local exchange processor fails. It can be delivered using either diverse routing or the normal ISDN30 route to the local exchange and then re-routing half on to a second local exchange.

Dual ParentingDual Parenting

ISPBX is your telephone system