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Towers Crescent

  Access Control System

The buildings are equipped with an electronic access control system monitored by QDC Solution Center. The perimeter building access system limits entry into the building after normal business hours. Key readers are located at the building entrances for access after business hours.

Building hours are as follows:


7:00AM - 7:00 PM (Monday - Friday)

Revolving door is locked at 10:00 PM (Monday - Friday) and unlocked 7:00 AM - 7:00 PM on weekends.

The building is monitored by QDC Solution Center at all times including evenings, Saturdays after 1:00 PM, Sundays and holidays.


7:00 AM - 7:00 PM (Monday - Friday)


7:00 AM - 7:00 PM (Monday - Friday)


7:00 AM - 7:00 PM (Monday - Friday)

QDC Solution Center Telephones

By lifting the handset, you will automatically be connected to QDC Solution Center's Central Monitoring Station. The telephones may be used if there is a problem with the operation of your key. The monitor will unlock the door after verifying your name and key number. Special admission may be arranged in advance for visitors by calling QDC Solution Center at 703- 641-8900. Instruct visitors to use the security phone for admittance.

Revoking Lost or Stolen QDC Solution Center Keys

If a QDC Solution Center key is lost or stolen, or if it is not returned by a terminated employee, please contact QDC Solution Center immediately to deactivate the key. If the QDC Solution Center key is returned (by an employee leaving the company), the key can be reassigned to another employee. If the key is lost or stolen, or if an employee is terminated and does not return the QDC Solution Center key, it will be deactivated permanently.

All authorized employees will be issued a numbered and encoded QDC Solution Center key, which shall be assigned to that particular individual. The access control system works only if it is kept up-to-date. Please keep an active list of authorized QDC Solution Center key holders and their numbers. This should be done periodically and it is IMPERATIVE! In addition to limiting access to unauthorized personnel, the card readers make a permanent recording of the employees using it to gain access to the building. This may be useful to you in the event of a loss or theft after hours. For that reason alone, it is imperative that the name assigned to the QDC Solution Center key corresponds to its user.

Additionally, please make sure QDC Solution Center has an updated list of the emergency contacts and notification procedures for your organization. QDC Solution Center uses this list in the event they need to contact you about an active alarm or a building emergency. Typically, in the event of an alarm, you may want the lobby host to investigate first. This may eliminate the need for you to travel to the office unnecessarily. If so, please be sure to explain this to your QDC Solution Center representative when completing the instructions.

Quadrangle Monitoring Services Intro Letter

QDC Card Admin Form

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