Special functions for One Number Service

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Special functions for One Number

Service

If your telephone is integrated in an ONS group (ONS = "One Number Service"), you may be reached on all other telephones in this group, just as on your own tele- phone. For setting up an ONS group, contact your ad- ministrator.

An ONS group can consist of a maximum of 3 telephones (phone numbers).

ONS-Group

A (Master)

B

C

One member of the group may be an external tele- phone (e.g. a mobile telephone). One telephone in the group is the "master" (A); the master's phone number is also received by the other parties (B, C) in the ONS group.

If A, B or C is called, all telephones in the ONS group ring. If A, B or C is busy, all telephones in the ONS group are busy (busy tone for a caller from outside the ONS group). Each telephone within the ONS group may be reached at its original phone number.

The following features have further effects for internal party telephones within an ONS-group:

Call waiting ￿ page 22

Call Forwarding ￿ page 33

Do not disturb ￿ page 40

Line mailbox (MWI) ￿ page 21

Callback ￿ page 13

If your ONS group contains a mobile tele- phone, make sure that it is always available (switched on). Otherwise the mobile mailbox may answer the call prematurely, which can lead to problems when signaling the call on the other ONS group members.

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Siemens 4000 operating instructions Special functions for One Number Service

4000 specifications

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