Need bright idea here. SV8500 and call forward

[phadobas]

Here is the request I was asked today:
The user is a receptionist with a 32-button IP phone. She has all but one button used for something already. Her job is to take calls for a group and transfer the caller to the right person in that group. Sometimes she has to leave her desk. When she does, she wants to forward all her calls to a backup phone.
She wants to do this with just one button press instead of dialing the call forward access code, followed by the extension of the backup phone. This is so she can do it quickly, easily and never making a mistake as to where to forward the calls to. So that's fine, but she also wants some sort of light on the phone that indicates that the phone is forwarded, so that when she returns to the desk, she never forgets to unforward it. So that way it's fast, easy and fool-proof to operate this feature.
The trick is that there is only one button available for this.
a) If I program this one button to be the call forward button, then she has to always manually dial the backup phone's extension. Sure, the light turns on, so I win half the battle with this.

b) If I program this one button to be a speed dial, then she can forward the phone by the single press of this button, but there is no light that would remind her to unforward her phone. This is the other half of the battle.

So any bright idea? One thing I was thinking is to make that one button a Do Not Disturb button. And then somehow program the phone so that when it's in DND state, forward all its calls to the backup phone. That way, I'd get the light, and turning the feature on or off would be done with one press of a button. Except this doesn't seem to exist on the 8500.

So any way this could be done?

 

[belevedere]

Is it possible to set the back up phone with the same button assignments as the primary phone? Add a DND button to the back up phone, then calls can go to both and a press of the DND on or off on the back up phone gets the calls to ring there.
Another option is to set up a UCD group with those two phones. Again DND takes the phone in or out of the group.

 

[phadobas]

Hmmm.
Replicating the buttons of the reception phone to the backup phone is not an option.

I have to check into the UCD group idea.
So the reception phone has a prime line and a virtual that acts as a "rollover". The prime line is forward-busy to the "rollover". Then we have the backup phone which has it's own prime line and a virtual.

So should I put the reception phone and its rollover AND the backup phone into a UCD and have the reception DND her phone when she leaves?

 

[belevedere]

That might do it. This is a case where you need to just set it up and try it.

 

[phadobas]

Unfortunately no go.
I set the receptionist phone for Forward-busy to its rollover, and hunt to the backup phone. Pressing the DND button resulted in all calls go to the forward-busy destination (rollover), instead of the hunt destination.

But this might still be the right direction: find a way to make DND behavior send calls to a different destination than the forward-busy destination...

 

[belevedere]

I think UCD would be a better option. With those 2 phones in a UCD group, the DND takes you out of the UCD hunt. Place 1 phone in DND and test, then take it out of DND and place the other in DND and test. Possibly, with only 1 phone in the UCD group, set that group to overflow to the other phone then use DND to generate the overflow.