You've got it. Use a Calling Search Space to limit where the user can forward their calls to.
You can create a CSS's for each Calling Class of Service that you want. Maybe Executives need to be able to forward their phones to long distance numbers, but regular users only need to forward their phones to local and internal numbers.
Correct. As Tim stated. Go to the Directory Number Configuration of the phone. Then scroll down to where the Call Forward parameters are and there you will see that you have the ability to assign a different CSS for all, busy, and no answer. These can be different than the CSS assisgned to the phone/dn.
Forwall all CSS: is the CSS to restrict where the phone can be uncondional Forwarded.
Forward busy: is the CSS to restrict where the phone can be forwarded when it is busy
Forward no answer: is the CSS to restrict where the phone can be forwarded when nobody answer.
I can not restrict where the call can be forwarded manually by the phone user when he receive a call and want to forward that call.
That it is very important because when a call that comes in (from PSTN) and it is forwarded to PSTN (manually by the user) toll fraud is produced and disconexion problems if it is an FXO. And others problems to (E1 b-channels, etc).
When you say "when he receives a call and want to forward that call"
If a user is receiving a call, then he is not forwarding it. If you mean restricting where he can TRANSFER it, then you are limited to using the calling search space of the phone. There is no way that I know of to restrict the transfer css.
Currently there is no Transfer CSS. Please contact your Cisco Account Team to find out if this feature is being looked at and if not ask them to create a feature request. I can see where this would be desirable for many customers.
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