# Creating a DDI numbering range

Lets you create a DDI range for ISDN or SIP connections and assign call distribution elements and internal destinations to the DDI numbers.

## Create DDI numbering range

Table 1. Settings
Parameter | Explanation
DDI plan | Lets you select the DDI plan for which you want to create a new DDI numbering range.
DDI number start value | Enter here the first DDI number you want to create.
Last DDI number | Enter here the last DDI number you want to create.
Routing destination | A CDE is defined as standard as the destination for a DDI. If a fax server is in operation on the applications card of a CPU2, Routing destination = FAX must be configured for the fax numbers. Note: This parameter is visible only for a Mitel 470 fitted with CPU2 application card.
Link matching users | Yes; create also DDI numbers with no matching users: All the DDI numbers of the new block will be created. If internal users with the same numbers exist, they will be allocated as call distribution destination. A common destination can be allocated to all the other DDI numbers, depending on the switching position of a switch group (default value. UG 16) Yes; do not create DDI numbers with no matching users: A DDI number will only be created if an internal user with the same number already exists. The user will be allocated as the destination for all the switch positions of a switch group. No: A common destination can be allocated to all the DDI numbers of the new block, depending on the switching position of a switch group (default value: UG 16)
Assign name | If with the parameter Link matching users the internal users can be allocated as call distribution destination, the name of the user is also assigned as name of the corresponding call distribution element.
Reuse matching CDE | If a CDE with a matching user already exists, the DDI points to this CDE.

## Create by copying the routing from another range

Table 2. Settings
Parameter | Explanation
DDI plan | Lets you select the DDI plan for which you want to create a new DDI numbering range.
DDI number start value | Enter here the first DDI number you want to create.
Last DDI number | Enter here the last DDI number you want to create.
DDI plan |
DDI number |

## CDE creation

From a functional point of view the reference numbers of the call distribution elements are insignificant and are assigned automatically.

You can however use the following settings to predetermine a different numbering. e.g. it is helpful for maintaining the overall clarity if the CDE reference number matches the DDI number.

Table 3. Settings
Parameter | Explanation
Start CDE |
Consecutively CDE numbering |

## Predefined call destinations

Enter here the call destinations that are to be configured for the new call distribution elements being created.

Table 4. Settings
Parameter | Explanation
Routing destination | Specification of the connected destination. You can find an overview of the destinations on the next two tables.
User group | Lets you select the user group you want if one of the specified destinations is a user group.
User | Lets you select the user you want if one of the specified destinations is a user.

Table 5. Unique destinations (CDE)
Destination | Explanation
User | The call is routed to a single user (internal user, guest room, PISN user, and others).
User group | The call is routed to a user group, where it is distributed.
KT Line (line key) | Line dialler/key telephone: The call is routed to a KT line and offered to all the line keys linked to this KT line.
Operator console | The call is routed to the operator queue and is offered to all connected operator consoles and operator applications.
ACD (Automatic Call Distribution) | The call is routed to the ACD queue from where it can be fetched by an ACD server or ACD application. Note: For calls to the ACD queue you must select the Force showing DDI number setting in the CDE configuration.
PSTN overflow | Destination of a break-in configuration in the AIN.
Voice mail | The call is routed directly to the voice mail. Note: Only use this destination in an alternative call distribution element of a user with a voice mailbox. Otherwise the call cannot be assigned to any voice mailbox.
Mobile/external phone integration | This destination is part of the mobile/external phone integration. The call distribution element must be linked to the central dial-in number for the mobile/external phone integration.
Modem | This is the remote maintenance destination for the analogue dial-up access. The call distribution element must be linked to the central dial-in number for the analogue remote maintenance.
Remote management (SRM) | This is the remote management destination for the dial-up access of the SRM server. The call distribution element must be linked to the central dial-in number for the IP remote management.
Conference bridge | This destination is used for the dial-in conference. In the numbering plan, the call number 896 is predefined for this purpose, pointing to a CDE with this destination. However, more CDEs can be configured with the routing destination Conference bridge. It is important to define call numbers for these call distribution elements, through which internal conference participants can dial in to the conference bridge. So external users can also reach the conference bridge, a dialling in number must be set up which points to this CDE.

Table 6. Multiple destinations (CDE)
Destination | Explanation
User + UG | The call is routed simultaneously to a single user and to a user group.
User + KT | The call is routed simultaneously to a single user and to a KT line.
KT + UG | The call is routed simultaneously to a KT line and to a user group.
User + UG, busy | The call is routed simultaneously to a single user and to a user group. If one of the destinations is busy, the caller obtains the busy tone and the call is not offered to the second destination either.
User + KT, busy | The call is routed simultaneously to a single user and to a KT line. If one of the destinations is busy, the caller obtains the busy tone and the call is not offered to the second destination either.

See also...

You can find general information about DDI numbers in the DDI plan view for Standard mode).

Note:

In USA/Canada the abbreviation DID (Direct Inward Dial) is used instead of DDI (Direct Dialling In)

Parent topic: Incoming call routing
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