The Night Service button feature is used on a button on the first extension on the system to turn night service on and off.
•You can only program a Night Service button on the first extension port on the system.
•This function is only supported on a button that includes LED/LCD indicator. The indicator is lit when the function is enabled.
•If the user has this feature enabled, removing this button will turn the feature off.
•Dialing restrictions for extensions not in the Night Service Group remain the same as during normal daytime operation.
•If you reassign the Night Service Button, it is removed from the button where it was previously assigned.
•Night service uses the System Password, if set, as follows:
oYou must enter the password when turning Night Service on or off.
oCalls to numbers other than marked system dials or in the Emergency Numbers list requires entry of the system password.
•If you have a voice messaging system, VMS Hunt Schedule determines when outside calls should ring voicemail. The status of the Night Service Button tells the voice messaging system to operate in day or night mode.
•The Night Service Button returns to the status (on/off) it was in immediately after a power failure or a system reset.
•Night Service is unavailable on T1 lines with Direct Inward Dialing (DID)..
Programming a Night Service Button
1.Click on User in the menu bar.
2.Highlight the required user by clicking on them.
3.Click on the 
edit icon in the Button Programming panel on the right.
4.The current button programming for the user is displayed.
5.In the Program Buttons panel click on the button that you want to program. The current settings of that button are displayed in the Button Specification panel.
6.Click on the Assign Feature button.
7.Select System Features.
8.Select Night Service.
9.Click OK.