Hi Nitin,
I do not believe what you are asking is possible under normal configurations. If I could better understand the intent of your desired configuration, perhaps there may be a creative solution available.
If the employee escort presents his badge (and his alone), what is the behavior you want from this door?
If the unescorted badge is presented, I assume you want the door not to unlock.
The problem here is that with a single reader, single gateway, single door configuration, there isn't a way to configure the system so that the employee escort is both able to badge in by himself and badge in as a 2nd swipe to enable a guest to enter. Of course restricting the door so that an employee escort must badge in to open is simple, as that would be the normal behavior (grant access for employees.)
Now.. for creative solutions (and assuming it would be acceptable for the employee escort to not be allowed in unless the 2nd (guest) badge is presented,) you could configure this reader and door as if it were really 2 doors. (I have not tested this in a lab, just hypothesizing at this time.) Configuring the guest badge to open a 'phantom door', triggering an output on the gateway (a 'phantom lock') and having this output be wired in series with the lock mechanism and a second output on the gateway, the employee escort would badge in, grant access on the phantom door, triggering the output on that gateway module as if it were unlocking the door. The door would not actually unlock since it is wired in series with the output on the 2nd module defining the real door. The relock timer for this phantom door would have to be set long enough to permit the employee escort to badge in while the phantom door was still in the unlocked state. Once the employee escort badges in and is granted access, the lock solenoid would be powered and the door would unlock.
Solutions like this would have to be tested, and may not be Cisco / TAC supported. It would require wiring the reader to both modules on the gateway (this could potentially cause problems,) or using separate readers for guest and escort so that the phantom door has its own reader.
A less creative and known to work option would be to deploy readers which have a keypad, and require that a badge swipe plus pin is required for access. The employee escort would know the pin, the guest badge holder would only have the badge. With this solution, the employee can always badge in using his own card, and the guest needs the escort to open the door as the guest does not know the pin.
I hope that helps,
Jim
