How to configure the One Number Link You (ONLY) service for the U1900 series unified gateway

The One Number Link You (ONLY) service refers to a service in which multiple terminals of a user share the same number and the same supplementary services.
To configure the One Number Link You (ONLY) service for the U1900 series unified gateway, do as follows:
1. Log in to the U1900 using the CLI and access the Config mode.
2. (Optional) Add a time segment index and bind different time segments for different numbers.
For example, add time segment index 1 to specify the following time segment: 08:00-18:00 from Monday to Friday.
config add timerange index 1 weekly mon&tue&wed&thu&fri begintime 8 endtime 18
3. Log in to the web management system of the U1900.
4. Choose User > SIP User.
5. Select the number for which the ONLY service needs to be configured, and click Service Configuration.
The service configuration page is displayed.
6. In the Complex Service area, click Configure next to ONLY service.
7. In the dialog box that is displayed, set required parameters as prompted.
8. Click OK.
A configuration success message is displayed.

Note: For detailed parameter settings, obtain the U1900 product documentation of the corresponding version from Huawei official website.