Programming switchboards: Can all the telephone calls be sent to a single extension that serves as a post-operator?

The switchboard must be programmed for the night-time service.
From extension 41 enter the sequence: 98 1234 (extension no.) 5 R
The number 5 indicates night-time service for line 1.
98 1234 (extension no.) 6 R
The number 6 indicates night-time service for line 2.
The night-time service is activated by keying in code 901 R from any telephone. Key in 900 R to deactivate. If the night-time service is activated, all the telephone calls must be sent to the extension set in the programming. There may be more than one extension telephone.