Hi Norbert,
I don't know of any way to do this type of "One Button" config but maybe this CME feature would work for you. Maybe the client would like this as well as it is an automated service;
call-forward night-service
To automatically forward calls to another number during night-service hours, use the call-forward night-service command in ephone-dn or ephone-dn-template configuration mode. To disable automatic call forwarding during night service, use the no form of this command.
call-forward night-service target-number
no call-forward night-service
Night-service hours are defined using the night-service date and night-service day commands.
An ephone-dn can have all four types of call forwarding defined at the same time: all-calls, no-answer, busy, and night-service. Each type of call forwarding can have a different forwarding destination defined in its target-number argument. If more than one type of call forwarding is in effect (is active) at one time, the precedence order for evaluating the different types is as follows:
1. call forward night-service
2. call forward all
3. call forward busy and call forward no answer
If you use an ephone-dn template to apply a command to an ephone-dn and you also use the same command in ephone-dn configuration mode for the same ephone-dn, the value that you set in ephone-dn configuration mode has priority.
Examples
The following example establishes night-service hours from 1 p.m. Saturday until 8 a.m. Monday. During that time, calls to extension 1000 (ephone-dn 1) are forwarded to extension 2346.
telephony-service
night-service day sat 13:00 12:00
night-service day sun 12:00 08:00
night-service code *1234
From this good doc;
http://www.cisco.com/en/US/products/sw/voicesw/ps4625/products_command_reference_chapter09186a008061134b.html#wp1063536
Hope this helps!
Rob
